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  • 1.
    André, Samuel
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Johansson, Joel
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    The design platform – a coherent platform description of heterogeneous design assets for suppliers of highly customised systems2017Inngår i: Journal of engineering design (Print), ISSN 0954-4828, E-ISSN 1466-1837, Vol. 28, nr 10-12, s. 599-626Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Companies developing highly customised products are continuously faced with fluctuating requirements during the early and late stages of the product development (PD) process. This differs from companies that develop end-consumer products, which uses fixed specifications and where product platforms have been a successful enabler for efficient customisation. However, in the past, product platforms have not been able to fully support companies working in an engineer-to-order business environment. This article outlines the results from a three-year collaborative research project between academics within the area of engineering design and practitioners from the engineer-to-order industry. The research introduces a design platform (DP) that aims to support the development of customised products when traditional platform concepts do not suffice. The platform approach provides a coherent environment for heterogeneous design assets to be used in PD by supporting both the design activity and the finished solutions. The needs and abilities regarding such a platform were investigated through a series of interviews and workshops at four companies. Then, the DP was modelled and support tools were developed. Finally, company representatives evaluated the complete DP and its applications, reporting promising results.

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  • 2.
    André, Samuel
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    A platform model for suppliers of customized systems: Creating an ability to master fluctuating requirements2016Inngår i: Proceedings of the ASME 2016 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, IDETC/CIE 2016, Charlotte, August 21-24, 2016., 2016Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Companies developing highly customized products within the supplier industry are continuously faced with fluctuating requirements during both the quotation process and continued development. This research proposes a platform approach to aid suppliers when modularity or platform scalability do not suffice. The platform approach, Design Platform, focuses on descriptions that not only contain information about tangible components and systems but also information, knowledge and methods supporting the actual design of the product. A support system called Design Platform Manager has been developed to aid in using the platform approach and is introduced at a supplier active in the automotive industry. The system enables creation of generic product items that can be structured and instantiated to become product variants as well as Design Elements that are blocks of knowledge that describe a design or supports the activity of designing. A first evaluation is made that overall shows good result according to the company representatives.

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    fulltext
  • 3.
    André, Samuel
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Introducing Design Descriptions on Different Levels of Concretisation in a Platform Definition2015Inngår i: Product Lifecycle Management in the Era of Internet of Things / [ed] Bouras, A., Eynard, B., Foufou, S., Thoben, K.-D., Springer, 2015, s. 800-810Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Product platforms has been widely accepted in industry as a means to reach both high product variety while maintaining business efficiency. For suppliers of highly customised products, however, the development of a platform based upon predefined modules is a challenge. This is due to the large differ-ences between the various systems their products are to be integrated into and the customer's individual preferences. What is common for most platform descriptions is the high level of concretisation, such as predefined modules, they are built upon, but how can companies act when that is not possible? Are there other principles that can be used for the definition of a product platform? This paper presents a concept to incorporate other types of descriptions of different levels of concretisation into a product platform. Parts of the concept has been realised in a computer support tool and tested at a case company in order to improve their quotation process.

    Fulltekst (pdf)
    fulltext
  • 4.
    André, Samuel
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Johansson, Joel
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Poorkiany, Morteza
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Managing Fluctuating Requirements by Platforms Defined in the Interface Between Technology and Product Development2014Inngår i: Advances in Transdisciplinary Engineering: Moving Integrated Product Development to Service Clouds in the Global Economy / [ed] Cha, J., Chou, S.-Y., Stjepandić, J. , Curran, R., Xu, W., Amsterdam: IOS Press, 2014, s. 424-433Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Product platforms play an important role for the efficient customisation and variant forming of products in many companies. In this paper four different companies ranging from OEM to B2B suppliers have been interviewed on how they engage in technology and product development, create and maintain product platforms and how they respond to the changing requirements on the platforms and on the products and product families derived from them. The objective is to find how product platforms are used to meet the demands of efficient product customisation. The companies all have identifiable product platforms and established processes for product development. However, there are differences in how they define technology development, how the platforms are created, maintained, replaced and what the platforms contain. The introduction of new technology into the platforms and how the platforms are used from a Lean product development perspective has been of interest in the survey as reported in the paper.

  • 5.
    Arjomandi Rad, Mohammad
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Raudberget, Dag
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Produktionsutveckling. Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling. Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Produktionsutveckling.
    Data-driven and Real-time Prediction Models for Highly Iterative Product Development Processes2022Inngår i: Transdisciplinarity and the Future of Engineering / [ed] B. R. Moser, P. Koomsap, J. Stjepandić, IOS Press, 2022, s. 463-472Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Some high-level technical products are associated with transdisciplinary simulation-driven design processes. Therefore, their design process involves many stakeholders and is prone to frequent changes, leading to a highly iterative process with a long lead time. Despite the decades of statistical approximations and metamodeling techniques on prediction models, companies are still striving toachieve fully automated real-time predictions in early design phases. The literature study shows a gap in existing methods such as not being fully real-time or suffering from high dimensionality. This paper presents a generic model for the development process of such described products and motivation for such modeling through a series of semi-structured interviews with an automotive sub-supplier company. The proposed process model points to the digital verification in every design loop as the bottleneck which is then confirmed by interviewees. As alternative solutions to overcome the problems, a method for data-driven and real-time prediction models is presented to enable the designer to foresee the consequence of their decision in the design phase. To evaluate the method, two examples of such real-time metamodeling techniques, developed in an ongoing research project are discussed. The proposed examples confirm that the framework can reduce lead time spent on digital verification and therefore accelerate the design process in such products.

  • 6.
    Arjomandi Rad, Mohammad
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Salomonsson, K.
    Department of Mechanical Engineering, School of Engineering Science, University of Skövde, Skövde, Sweden.
    Cenanovic, Mirza
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Produktionsutveckling.
    Balague, H.
    Autoliv AB, Vårgårda, Sweden.
    Raudberget, Dag
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Produktionsutveckling. Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Correlation-based feature extraction from computer-aided design, case study on curtain airbags design2022Inngår i: Computers in industry (Print), ISSN 0166-3615, E-ISSN 1872-6194, Vol. 138, artikkel-id 103634Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Many high-level technical products are associated with changing requirements, drastic design changes, lack of design information, and uncertainties in input variables which makes their design process iterative and simulation-driven. Regression models have been proven to be useful tools during design, altering the resource-intensive finite element simulation models. However, building regression models from computer-aided design (CAD) parameters is associated with challenges such as dealing with too many parameters and their low or coupled impact on studied outputs which ultimately requires a large training dataset. As a solution, extraction of hidden features from CAD is presented on the application of volume simulation of curtain airbags concerning geometric changes in design loops. After creating a prototype that covers all aspects of a real curtain airbag, its CAD parameters have been analyzed to find out the correlation between design parameters and volume as output. Next, using the design of the experiment latin hypercube sampling method, 100 design samples are generated and the corresponding volume for each design sample was assessed. It was shown that selected CAD parameters are not highly correlated with the volume which consequently lowers the accuracy of prediction models. Various geometric entities, such as the medial axis, are used to extract several hidden features (referred to as sleeping parameters). The correlation of the new features and their performance and precision through two regression analyses are studied. The result shows that choosing sleeping parameters as input reduces dimensionality and the need to use advanced regression algorithms, allowing designers to have more accurate predictions (in this case approximately 95%) with a reasonable number of samples. Furthermore, it was concluded that using sleeping parameters in regression-based tools creates real-time prediction ability in the early development stage of the design process which could contribute to lower development lead time by eliminating design iterations.

  • 7.
    Arjomandi Rad, Mohammad
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Elgh, Fredrik
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    System properties to address the change propagation in product realization2020Inngår i: Transdisciplinary engineering for complex socio-technical systems – Real-life applications: Proceedings of the 27th ISTE International Conference on Transdisciplinary Engineering, Warsaw, Poland, 1-10 July 2020 / [ed] J. Pokojski, M. Gil, L. Newnes, J. Stjepandić & N. Wognum, Clifton, VA: IOS Press, 2020, Vol. 12, s. 343-352Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Demanding markets and complex products are only some of the reasons that make changes and variations inevitable through different stages of product realization. From early phases of product development to downstream production phase, these changes or variations cause failure either directly or by propagating to other phases, triggering more fluctuations like the well-known butterfly effect. In this paper, first, the definition of changes in product realization will be reviewed and then different papers and their classification on change related system properties (illites) will be discussed and compared. It was argued that considering a system-level view, one could trace these propagations in the systems as a result of not being robust, flexible, or adaptable, etc. Some of the ambiguity in this semantic field demonstrated and most repeated definitions are identified as the unanimous and agreed-upon definitions in the literature. In the end, a historical comparison of the three identified properties presented. The results of this study help us to understand the multidisciplinary nature of these propagations and identify their stemming turbulent environment. This will be used as a foundation for forthcoming research either to prevent these propagations or utilize their attributes in the product realization.

    Fulltekst (pdf)
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  • 8.
    Dogea, Ramona
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Identifying challenges related to industry 4.0 in five manufacturing companies2021Inngår i: Procedia Manufacturing, E-ISSN 2351-9789, nr C, s. 328-334Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The emergence of the 4th industrial revolution has resulted in significant improvement in the effectiveness of product and production development. Nowadays, research has been done focused on new technologies of integrated products and production platforms to support decision making in engineering processes. This means that there is the need to continuously explore different ways of integrating product and production platforms in industry. The aim of this paper is directed at finding the current state of practice in today´s industry with respect to their degree of automation. To make this achievable, a methodology based on the interactive research principles and the design research methodology is followed. As input data, six Swedish companies were interviewed in order to draw a picture of their challenges and needs for each lifecycle phase of selected products. The main contribution of this work is the identification of gaps in their product and production platforms as well as methods to address them. Struggling with understanding and adopting Industry 4.0, this paper also reviews the concepts and approaches related to digitalisation of product and production platforms. The results show that there are three application fields the companies have been facing: simulation and calculation, automation as well as data management. Within them, there are common aspects like lack of software tools, design and production automation, data migration and collection, or data handling in production. The findings of the study strongly suggest companies to adopt Industry 4.0 techniques to improve their product and production assets.

  • 9.
    Elgh, Fredrik
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    André, Samuel
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Johansson, Joel
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Design Platform - A Coherent Model for Management and Use of Mixed Design Assets2017Inngår i: Transdisciplinary Engineering: A Paradigm Shift: Proceedings of the 24th ISPE Inc. International Conference on Transdisciplinary Engineering / [ed] C. H. Chen, A. C. Trappey, M. Peruzzini, J. Stjepandić, & N. Wognum, IOS Press, 2017, nr 3-4, s. 703-712Konferansepaper (Fagfellevurdert)
    Abstract [en]

    For many companies, it is a challenge to balance product variety and cost, i.e. external and internal efficiency. Product platforms has been the dominant solution for a business targeting mass-customization. The main idea is to dived the product into modules that can be shared among different product variants. This has been a success on the consumer market, however, many manufacturing companies are engineer-to-order (ETO) oriented, such as original equipment suppliers (OES). They design a unique solution, often in close collaboration with other companies, based on different product concepts and/or core technologies. For these companies, there is a strategic need for a platform model influenced by the principles of masscustomization, although, not limited to only include modules. In this work, a novel platform model, called Design Platform is described. The model has been developed and applied in cooperation with four companies. The Design Platform provides a coherent environment for management of heterogeneous design assets to be used in product development and supports an improved ability to master fluctuating requirements and systematic introduction of new technologies.

    Fulltekst (pdf)
    fulltext
  • 10.
    Elgh, Fredrik
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    André, Samuel
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Johansson, Joel
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Design Platform: Setting the Scope and Introducing the Concept2016Inngår i: Proceedings of the DESIGN 2016 14th International Design Conference, Dubrovnik, May 16-19, 2016. / [ed] Marjanović, D., Štorga, M., Pavković, N., Bojčetić, N., Škec, S., The Design Society, 2016, s. 1253-1264Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Product platforms has been a successful enabler for efficient mass customization. However, they cannot fully support suppliers working in an engineer-to-order business environment. This work identifies the need and scope of a different platform model that supports customization and management of fluctuating requirements. A novel plaform model is introduced entitled Design Platform. The model is based on the current state and future target condition at four companies. The model provides a coherent environment for heterogeneous design assets to be used in product development.

    Fulltekst (pdf)
    fulltext
  • 11.
    Elgh, Fredrik
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Johansson, Joel
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Poorkiany, Morteza
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Raudberget, Dag
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Traceability of decisions in product realization processes of custom engineered products2018Inngår i: DS92: Proceedings of the DESIGN 2018 15th International Design Conference / [ed] Marjanović D., Štorga M., Škec S., Bojčetić N., Pavković N., The Design Society, 2018, s. 249-260Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Custom engineered products require an engineer-to-order approach in development, quotation preparation and order processing. This work reports the result of a three-and-a-half-year project were the objective was to develop means for implementation and management of computer support for engineering design and production engineering of customized products. Efficient re-use is essential for success and decision is identified as the core concept to trace tasks executed, knowledge used, design rationale and artefacts developed throughout the product realization process.

    Fulltekst (pdf)
    fulltext
  • 12.
    Elgh, Fredrik
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Johansson, Joel
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Lennartsson, Martin
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Heikkinen, Tim
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Raudberget, Dag
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Platform Models for Agile Customization – What's Beyond Modularization?2018Inngår i: Transdisciplinary Engineering Methods for Social Innovation of Industry 4.0: Proceedings of the 25th ISPE Inc. International Conference on Transdisciplinary Engineering / [ed] Margherita Peruzzini, Marcello Pellicciari, Cees Bil, Josip Stjepandić, Nel Wognum, IOS Press, 2018, s. 371-380Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Many manufacturing companies are suppliers that deliver unique solutions to different business customers. Intense quotation work, with a high demand on accuracy and quick response, and development projects executed in close collaboration with customers and other actors characterize these companies. The projects can run for years or a few weeks depending on the business. Changes of requirements are frequent and technology development required for improved functionality, sustainability and competitiveness. The use of a product platform has been acknowledged as a strategic enabler for product family development and mass customization. However, companies struggle with adopting the common platform approach building upon pre-defined modules and components as it constraints the fulfilment of unique customer requirements and the introduction of new technology at high pace. This work reports the results from case studies conducted in collaboration with four companies. They are in many ways different but face the same challenges when it comes to customization, fluctuating requirements and need of high pace in technology advancement. The focus of this paper is on their initial states; including how they work with their product concept before the customer entry point, the work that is initiated when an order is accepted, the character of requirements and the adoption of product platforms. Criteria on, and identification of, new platforms models, termed Design Assets, are presented followed by a mapping to the Design Platform concept pointing out areas upcoming work, both scientifically and at the companies.

    Fulltekst (pdf)
    Fulltext
  • 13.
    Hatami, Sepehr
    et al.
    Chalmers University of Technology, Department of Materials and Manufacturing Technology .
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Datorstödd konstruktion. Högskolan i Jönköping, Tekniska Högskolan, JTH, Maskinteknik.
    Nyborg, Lars
    Chalmers University of Technology, Department of Materials and Manufacturing Technology.
    Optimized Selection of Processing Routes for Sintered Parts Manufacture: A Component-Oriented Approach2009Inngår i: Advances in Powder Metallurgy and Particulate Materials, 2 ( Part 13 ): Proceedings of the 2009 International Conference on Powder Metallurgy & Particulate Materials / [ed] MPIF, Princeton, N.J.: Metal Powder Industries Federation , 2009Konferansepaper (Fagfellevurdert)
    Abstract [en]

    To stay competitive, PM manufacturers have to be able to accept a wide range of components with different features and properties. Thus, it is of utmost importance for manufacturers to adapt their common process routes to new requirements as rapidly and economical as possible. The procedure of identifying the right route among all the alternatives requires abundance of experience and knowledge and is a crucial and time-consuming decision; usually made by a team of engineers. In this study, by considering the mechanical properties and design specifications of the final component, a simple methodology is developed to aid the engineer(s) in selection of the optimum PM process route. In order to sort the possible routes according to cost, a cost estimating module has been devised. The total concept is applied to a case studyies and its accuracy has been evaluated.

  • 14.
    Heikkinen, Tim
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Elgh, Fredrik
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Extended Product Models – Dealing with Topological Changes and System TransparencyManuskript (preprint) (Annet vitenskapelig)
  • 15.
    Heikkinen, Tim
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Incorporating Design for Additive Manufacturing in Multidisciplinary Design Automation – Challenges Identified2019Inngår i: Proceedings of CAD'19, 2019, s. 372-376Konferansepaper (Fagfellevurdert)
  • 16.
    Heikkinen, Tim
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Elgh, Fredrik
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Incorporating Design for Additive Manufacturing in Multidisciplinary Design Automation – Challenges Identified2020Inngår i: Computer-Aided Design and Applications, ISSN 1686-4360, Vol. 17, nr 5, s. 936-947Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    One interesting method to take advantage of the particular capabilities of Additive Manufacturing is to utilize a combination of lattice-structures and topology optimization. This paper presents the results and experiences from attempting to incorporate these in an existing multidisciplinary design automation system within the aerospace industry. A combined state of art and practice is outlined with discussions regarding challenges in current commercial CAD tools, multidisciplinary design automation, and with respect to aerospace requirements.

    Fulltekst (pdf)
    Fulltext
  • 17.
    Heikkinen, Tim
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion. Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion. Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion. Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling.
    Andersson, Petter
    GKN Aerospace Sweden.
    Automated Producibility Assessment Enabling Set-Based Concurrent Engineering2016Inngår i: Transdisciplinary Engineering: Crossing Boundaries / [ed] Milton Borsato, Nel Wognum, Margherita Peruzzini, Josip Stjepandić and Wim J.C. Verhagen, IOS Press, 2016, s. 947-956Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The aero-engine industry is continuously faced with new challenging cost and environmental requirements. This forces company's, active in the industry, to work toward more fuel efficient engines with less environmental impact at a lower cost. This paper presents a method for assessing producibility of large sets of components within aircraft engines to enable a Set-Based Concurrent Engineering development approach. A prototype system has been developed aimed at enabling weldability analysis at a sub-supplier within the aero-engine industry. It is a part of a multi-objective decision support tool used in early design stages. The tool produces sets of CAD-models reaching the hundreds for different analyses, mainly focusing on performance aspects within structural analysis, aerodynamics and thermodynamics.

    Fulltekst (pdf)
    fulltext
  • 18.
    Hjertberg, Tim
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    A tool for obtaining transparency and traceability in heterogeneous design automation environments2018Inngår i: Computer-Aided Design and Applications, ISSN 1686-4360, Vol. 15, nr 4, s. 488-500Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Today, CAD-system are used for much more than just geometric modeling. They are complemented by various software and information sources forming a complete environment for handling all life-cycle aspects of the product. In such systems, the CAD-system works as a central hub. The software and information sources may be of various types making the system highly heterogenous. This presents problems with transparency and traceability in the system making long term management difficult. In this paper, a novel tool is presented to keep track of the dependencies between the various parts of such systems providing an overview and making it possible to predict the effect of proposed changes and facilitating long term management. The tool is tested in a highly heterogeneous environment at a manufacturer of aerospace components, with the result that the traceability is expected to increase at the expense of that time must be spent on defining dependencies and meta-information as the system is evolving.

  • 19.
    Hjertberg, Tim
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion. Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion. Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion. Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling.
    Managing Dependencies in Heterogeneous Design Automation Systems2016Inngår i: Transdisciplinary Engineering: Crossing Boundaries / [ed] Milton Borsato, Nel Wognum, Margherita Peruzzini, Josip Stjepandić and Wim J.C. Verhagen, IOS Press, 2016, s. 279-288Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Increasing competition in cost efficiency, lead-times, product quality, quotation accuracy, and abilities to provide customization drives companies toward development and adoption of new methods. To re-use knowledge gained from previous projects in order to avoid producing the same knowledge again and to circumvent previously encountered obstacles is an approach which is more or less used by most companies. Utilization of Design Automation (DA) systems in the engineering design process have proven to increase process efficiency and to enable new ways of working by systematic re-use of engineering knowledge. In order to ensure system longevity, industrial practitioners and researchers have pointed at implementation and long term management as important aspects to consider during development. The systems are often built on top of commercial software and legacy systems integrated by different types of scripts and system descriptions which becomes dependent of each other in different ways. Changes made during maintenance in one of these artifacts propagates through the dependency structure making traceability and transparency key factors for keeping the system valid over time. This paper presents a description of the problem in a real industrial setting together with a suggestion of an approach, based on set-up and management of dependencies between sections inside and across different types of system components, which is aimed to aid implementation and management of DA tools. A prototype system which informs the user, of functional sections related to a functional section to be updated, have been developed. The prototype is applied on a multidisciplinary heterogeneous system environment used for simulation based knowledge build up and concept evaluations of jet engine components.

    Fulltekst (pdf)
    fulltext
  • 20.
    Hjertberg, Tim
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Poorkiany, Morteza
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Johansson, Joel
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Implementation and management of design systems for highly customized products – state of practice and future research2015Inngår i: Transdisciplinary lifecycle analysis of systems: Proceedings of the 22nd ISPE Inc. International Conference on Concurrent Engineering / [ed] Richard Curran, Nel Wognum, Milton Borsato, Josip Stjepandić, Wim J.C. Verhagen, IOS Press, 2015, s. 165-174Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Individualized products, resource-smart design and production, and afocus on customer value have been pointed out as three opportunities for Swedishindustry to stay competitive on a globalized market. All these three opportunitiescan be gained by efficient design and manufacture of highly customized products.However, this requires the development and integration of the knowledge-basedenabling technologies of the future as pointed out by The European Factories ofthe Future Research Association (EFFRA). Highly custom engineered productsrequire an exercising of a very rich and diverse knowledge base about the products,their production and the required resources for design and manufacture. Thedevelopment and implementation of systems for automated design and productionpreparation of customized products is a significant investment in time and money.However, our experience from industry indicates that significant efforts arerequired to introduce and align these kinds of systems with existing operations,legacy systems and overall state of practice. In this paper, support for systemdevelopment in literature has been reviewed in combination with a survey on thestate of practice in four companies regarding implementation and management ofautomated systems for custom engineered products. A gap has been identified anda set of areas for further research are outlined.

    Fulltekst (pdf)
    fulltext
  • 21.
    Jarfors, Anders E.W.
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Material och tillverkning.
    Matsushita, Taishi
    Jönköping University, Tekniska Högskolan, JTH, Material och tillverkning.
    Siafakas, Dimitrios
    Jönköping University, Tekniska Högskolan, JTH, Material och tillverkning.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    On the nature of the anisotropy of Maraging steel (1.2709) in additive manufacturing through powder bed laser-based fusion processing2021Inngår i: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 204, artikkel-id 109608Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Additive manufacturing is growing rapidly as a manufacturing method. Additive manufacturing is a rapid solidification process and may, as such, generate new microstructures with an improvement of mechanical properties compared to conventional manufacturing. The repeatability and deeper understanding of properties repeatability for both mechanical and thermophysical properties are not well-established. In the current study, a complete analysis of the nature of the anisotropy is experimentally analysed to provide input for better understanding of the printing process and the resulting properties as reliability and predictability are important factors to build trust in a new manufacturing process.

  • 22.
    Jarfors, Anders E.W.
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Material och tillverkning.
    Sevastopol, Ruslan
    Uddeholms AB, Hagfors, Sweden.
    Seshendra, Karamchedu
    Uddeholms AB, Hagfors, Sweden.
    Zhang, Qing
    Jönköping University, Tekniska Högskolan, JTH, Material och tillverkning.
    Steggo, Jacob
    Jönköping University, Tekniska Högskolan, JTH, Material och tillverkning.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    On the Use of Conformal Cooling in High-Pressure Die-Casting and Semisolid Casting2021Inngår i: Technologies, E-ISSN 2227-7080, Vol. 9, nr 2, artikkel-id 39Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Today, tool life in high pressure die casting (HPDC) is of growing interest. A common agreement is that die life is primarily decided by the thermal load and temperature gradients in the die materials. Conformal cooling with the growth of additive manufacturing has raised interest as a means of extending die life. In the current paper, conformal cooling channels’ performance and effect on the thermal cycle in high-pressure die casting and rheocasting are investigated for conventional HPDC and semisolid processing. It was found that conformal cooling aids die temperature reduction, and the use of die spray may be reduced and support the die-life extension. For the die filling, the increased temperature was possibly counterproductive. Instead, it was found that the main focus for conformal cooling should be focused to manage temperature around the in-let bushing and possibly the runner system. Due to the possible higher inlet pressures for semisolid casting, particular benefits could be seen.

  • 23.
    Jarfors, Anders E.W.
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Material och tillverkning.
    Shashidhar, Akash C. G. H.
    Jönköping University, Tekniska Högskolan, JTH, Material och tillverkning.
    Yepur, Hrushi K.
    Jönköping University, Tekniska Högskolan, JTH, Material och tillverkning.
    Steggo, Jacob
    Jönköping University, Tekniska Högskolan, JTH, Material och tillverkning.
    Andersson, Nils-Eric
    Jönköping University, Tekniska Högskolan, JTH, Material och tillverkning.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Build strategy and impact strength of slm produced maraging steel (1.2709)2021Inngår i: Metals, ISSN 2075-4701, Vol. 11, nr 1, s. 1-20, artikkel-id 51Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The current paper aimed to study the impact properties of additively manufactured maraging steel (1.2709) using laser powder bed fusion (PBF-L) processing. The specimens were fabricated using 3D Systems ProX 300 equipment under constant specific power input, or Andrew number. The interactions between the build strategy and parameters such as hatch spacing and scan speed was, and the impact strength and fracture were investigated. The impact energy anisotropy was also investigated in parallel and perpendicular to the build direction. Instrumented impact testing was performed, and the fractography supported that the fusion zone geometry dictated the fracture behavior. The influence from gaseous elements such as nitrogen, oxygen, and hydrogen was found insignificant at the levels found in the printed material. 

  • 24.
    Johansson, Joel
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Raudberget, Dag
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    An approach to capture engineering knowledge through visual evaluation of mass generated design proposals2016Inngår i: Proceedings of the DESIGN 2016 14th International Design Conference, Dubrovnik, May 16-19, 2016 / [ed] Marjanović, D., Štorga, M., Pavković, N., Bojčetić, N., Škec, S., The Design Society, 2016, s. 679-688Konferansepaper (Fagfellevurdert)
    Fulltekst (pdf)
    Conference paper
  • 25.
    Jonsson, Carl-Johan
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Elgh, Fredrik
    Jönköping University, Tekniska Högskolan, JTH, Produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    A case-based reasoning method including tooling function for case retrieval and reuse in stamping tooling design2023Inngår i: Computer-Aided Design and Applications, ISSN 1686-4360, Vol. 20, nr 5, s. 839-855Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Design of sheet metal forming tooling is currently based on that experienced tooling designers with good knowledge of how stamping tools previously have been designed and operated in production, apply their knowledge when making a new design. For retrieving former designs, they often need to rely on their good memory. In this paper, an automatic method for retrieving relevant former cases is presented. A major challenge is defining the similarity between the current and the former cases i.e., finding the relevant parameters to include in the CBR (Case-based reasoning) search. This is here addressed by using CAD model parameters both from former components and the tooling for their production. By interviewing tooling designers in industry, a set of relevant parameters has been identified. To arrive at the correct weight of each parameter, a genetic algorithm has been used to optimize the search results. This resulted in a quick and automated way of retrieving the most relevant former cases and presenting them to the designer. The method has been tested on actual cases with promising results. This has the potential of making sheet metal part and tooling design less reliant on memory and experience.

  • 26.
    Jonsson, Carl-Johan
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Elgh, Fredrik
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Design knowledge reuse in design of progressive stamping tools: A qualitative study2021Inngår i: Proceedings of the Design Society , Volume 1 , August 2021, Cambridge University Press, 2021, Vol. 1, s. 1053-1062Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Progressive stamping tools are widely used in mass-production of sheet metal components and their performance is critical as the design of the tool impact the cost of the manufactured component significantly. Knowledge reuse is an important part of successful design in general, and in progressive stamping tool design in particular. In the study described in this paper, 8 tool designers from 5 different Swedish companies were interviewed about (1) at what points in the tool design process they search for previously designed tools for information and knowledge reuse, (2) under what conditions and for what reasons does this reuse take place, and (3) what types of information and knowledge are sought for at each point. The results show that reuse of information and knowledge from previously designed tools happens in many parts of the tool design process. The reasons and conditions for reuse vary depending on where in the process the designer is. High component complexity is one example of a common factor triggering reuse. Also, information about the performance of the tool is important to tool designers, as they only want to reuse information and knowledge from tools with good performance and low maintenance.

  • 27.
    Jonsson, Carl-Johan
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Elgh, Fredrik
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Method for Task-based Model Retrieval for Reuse in Stamping Tool Design2022Inngår i: CAD'22 Proceedings, 2022, s. 189-193Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Introduction: Shorter lead-times are a constant driver for improving efficiency in the design and manufacturing of stamping tools for sheet metal components. Finding and reusing past solutions in design is an important way for improving efficiency and quality in stamping tool development. This can be done in the form of retrieving CAD-models of relevant past tooling designs. This type of knowledge reuse is standard practice among tool designers through remembering past problems, and solutions from previous projects, or having a collection of good examples of tools of different varieties, to reuse solutions from. Automatically indexing and retrieving relevant CAD-models of the tools can enable the tool designers to conduct the search more systematically and automatically. Retrieving relevant similar CAD-models automatically, however, has some challenges regarding how similarity should be defined, as geometric similarity is ill-defined [4]. A relevant metric of similarity depends on the application context, the objective, and what knowledge that the designer is searching for [3].

    In this work, focus is on variations in the different use cases and situations of the stamping tool design process. The existing work done in the application to stamping tools has provided retrieval mechanisms for blanking dies [1], deep drawn features [6], and overall similarity [5]. In the stamping tool design process, the information and knowledge sought for at different stages are different in nature [2] and require individual similarity metrics and parameters to be effective. An example of this is that, the relevant CAD-models to retrieve when designing the functionality for part ejection from the tool is different from the relevant models when designing forming dies of the same tool.

  • 28.
    Jonsson, Carl-Johan
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Elgh, Fredrik
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Stamping tools for sheet metal forming: Current state and future research directions2020Inngår i: Transdisciplinary engineering for complex socio-technical systems – Real-life applications: Proceedings of the 27th ISTE International Conference on Transdisciplinary Engineering, Warsaw, Poland, 1-10 July 2020 / [ed] J. Pokojski, M. Gil, L. Newnes, J. Stjepandić & N. Wognum, Clifton, VA: IOS Press, 2020, Vol. 12, s. 281-290Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Sheet metal forming tools play an important role in the manufacturing of many products. With shorter product life cycles and demand for shorter time to market for new products, the process for design and manufacturing of stamping tools becomes a critical part. Stamping dies are often designed and manufactured by smaller, specialized companies. For a tooling company, knowledge and experience is an important competitive advantage. Traditionally the design process has been characterized by being based on few key individuals with much experience and craftsmanship. To stay competitive in this market there is a need for more efficient processes, systems, tools and supports in order to become more industrialized. This paper presents results from a study of the state of practice in industry within progressive stamping tool design as well as a review of relevant literature. The design and manufacturing processes for stamping dies in six companies have been investigated through semi-structured interviews, from which the main challenges in the current state for the companies are identified. The results from the interviews was analyzed and compared to the established concepts and frameworks of methods found in the literature review. The results and analysis points in the direction of efforts needed in supporting the formalization and reuse of information and knowledge from previous tool projects and production, especially during the critical steps of tool process planning and creating the tool layout.

  • 29.
    Pabolu, Venkata Krishna Rao
    et al.
    Jönköping University, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Produktutveckling. Jönköping University, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Johansson, Joel
    Jönköping University, Tekniska Högskolan, JTH, Produktutveckling. Jönköping University, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Flexible manufacturability analysis applied to the welding process to increase sustainability in engineer to order businesses2017Inngår i: International Journal of Agile Systems and Management, ISSN 1741-9174, E-ISSN 1741-9182, Vol. 10, nr 3/4, s. 271-294Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper addresses the manufacturability of welded components for engineer to order businesses including manufacturing feasibility, approximate manufacturing cost, manufacturing difficulties along with the sustainability aspects. This is addressed by creating an evaluation system for integration in a multi-objective design analysis system in the early phases of product development of the jet engines components in an aerospace business. The work is focused on the weldability assessment based on available weld methods and the weld capabilities of the company. Several rules for analysing the weldability are proposed. To keep the knowledge transparent, traceable and updatable, it is managed by a novel software called Howtomation© Suite using a forward chaining inferencing engine. The proposed framework enables a weldability index and welding cost guide to be derived, helping the designers choose appropriate weld method in early design stages.

  • 30.
    Pabolu, Venkata Krishna Rao
    et al.
    Högskolan i Jönköping, Tekniska Högskolan.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion. Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling.
    Johansson, Joel
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion. Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling.
    Manufacturability Analysis for Welding: A Case Study Using Howtomation© Suite2016Inngår i: Transdisciplinary Engineering: Crossing Boundaries / [ed] Milton Borsato, Nel Wognum, Margherita Peruzzini, Josip Stjepandić and Wim J.C. Verhagen, IOS Press, 2016, s. 695-704Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper is a summary of master thesis written in the fall of 2015 in the department of Product Development in Jonkoping University in Sweden as a part of a research project with focus on the implementation and management of systems for design automation and design for manufacturing. It includes an implementation with the aim of enhancing a system currently in operation at an aerospace supplier. The system is used for multi-objective design analysis in the early phases of product development. The analysis involves both the performance of the jet engines components as well as their manufacturability. The work is focused on the weldability assessment, based on available weld methods and the weld capabilities of the company. A number of rules for analysing the weldability are proposed. To keep this knowledge transparent, traceable and updatable it is managed by a novel software called Howtomation© Suite which is a forward chaining inferencing engine. The proposed framework enables a weldability index and welding cost guide to be derived, helping the designers choose appropriate weld method in early design stages.

    Fulltekst (pdf)
    fulltext
  • 31.
    Raudberget, Dag
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Elgh, Fredrik
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Johansson, Joel
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Lennartsson, Martin
    Jönköping University, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Developing agile platform assets: exploring ways to reach beyond modularisation at five product development companies2019Inngår i: International Journal of Agile Systems and Management, ISSN 1741-9174, E-ISSN 1741-9182, Vol. 12, nr 4, s. 311-331Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The use of a product platform has been acknowledged as a strategic enabler for product family development and mass customisation. However, many companies struggle with adopting the common platform approach building upon pre-defined modules and components as it constrains the fulfilment of unique customer requirements and a rapid introduction of new technologies. These are the conditions under which manufacturing companies acting as suppliers operates, where unique solutions are delivered to different business customers, market segments or brands. This work reports the results from case studies of platform development conducted in collaboration with five product developing and manufacturing companies. The focus of this paper is on their initial states; including how they work with their product concept before a development project is started, the character of requirements and the adoption of product platforms. The main contribution of this work is a presentation of criteria on, and identification of, new platform elements termed design assets. These are introduced as a means to enable diverse types of resources to be reused in a company and a pragmatic way to bridge the gap between the physical products and the knowledge, tools and methods needed to realise these.

    Fulltekst (pdf)
    Fulltext
  • 32.
    Raudberget, Dag
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion. Chalmers University of Technology, Sweden.
    Levandowski, Christoffer
    Chalmers University of Technology, Sweden.
    André, Samuel
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Isaksson, Ola
    Chalmers University of Technology, Sweden.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Müller, Jakob
    Chalmers University of Technology, Sweden.
    Johansson, Joel
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Supporting Design Platforms by Identifying Flexible Modules2017Inngår i: 21st International Conference on Engineering Design (ICED17): Vol. 3: Product, Services and Systems Design / [ed] Anja Maier, Stanko Škec, Harrison Kim, Michael Kokkolaras, Josef Oehmen, Georges Fadel, Filippo Salustri, Mike Van der Loos, The Design Society, 2017, s. 191-200Konferansepaper (Fagfellevurdert)
    Abstract [en]

    One way for firms to stay competitive is to adapt a platform approach. In product platforms, modules are used as exchangeable design blocks to create a variety in product performance. This is a proven way to get advantages of scale in production by reusing physical parts and investments in manufacturing. To ensure exchangeability between modules, interfaces between modules must be well defined. Hence, from this point of view, there is no such thing as flexible modules. In this research, flexibility refers to the idea of identifying strategic portions of the platform where flexibility is needed and to create the modular division in a way that the assigned modules are de-coupled in theses areas. The presented approach shows how the Design platform concept can be extended by the introduction of flexible modules. These support the Design Platforms by allowing areas of strategic importance to be more flexible and thereby enable room for uncertainties such as fluctuating requirements and future technical development.

  • 33.
    Rivalta, F.
    et al.
    Department of Industrial Engineering, School of Engineering, University of Bologna, Viale del Risorgimento 2, Bologna, 40136, Italy.
    Ceschini, L.
    Department of Industrial Engineering, School of Engineering, University of Bologna, Viale del Risorgimento 2, Bologna, 40136, Italy.
    Jarfors, Anders E.W.
    Jönköping University, Tekniska Högskolan, JTH, Material och tillverkning.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Effect of scanning strategy in the l‐pbf process of 18ni300 maraging steel2021Inngår i: Metals, ISSN 2075-4701, Vol. 11, nr 5, artikkel-id 826Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Maraging steels are good candidates for the laser powder bed fusion process (L‐PBF), also known as Selective Laser Melting, due to excellent weldability and resistance to quench cracking. Powders physical and chemical characteristics dominate the final microstructure and properties of the printed parts, that are also heavily influenced by the process parameters. In this study, the effects of the scanning strategies on dimensions, average surface roughness, density and material hardness were evaluated, keeping the powder type and the volumetric energy density (Andrew number) constant. The effects of the scanning strategy on these properties are far less understood than on other important ones, like residual stresses and distortion, strongly affected by the scanning strategy. In this study, parallel stripes, chessboard and hexagonal pattern strategies were studied, keeping the Andrew number constant but varying the interlayer rotation. In general, the hexagonal strategy underperformed compared to the chessboard and the stripes ones.

  • 34.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Maskinteknik. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Datorstödd konstruktion.
    A CAD-integrated system for automated idealization of CAD-models for finite element analysis2005Inngår i: Proceedings of IDETC/CIE 2005: ASME 2005, 2005Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The work described in this paper seeks to minimize the time spent on manually reducing thin-walled CAD-geometry into surface idealizations. The purpose of the geometrical idealizations is the creation of shell element meshes for FE-calculations. This is motivated by time and thereby cost savings and also to make the results of the calculations available earlier in the product development process allowing the results to guide the designs to a larger extent.

    Systems for automated geometry idealization and creation of FE-models already exist, but this paper describes a novel approach with the working principle of analyzing how the CAD-specific features of the CAD-file history tree are constituted. This information is used to automatically create the best practice geometrical idealization in the same CAD-model.

    Evaluation of the performance of the system in an industrial example is also presented.

  • 35.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Maskinteknik. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Datorstödd konstruktion.
    A sectioning method for constructing the mid-surface of thin-walled die-cast and injection moulded parts2006Rapport (Annet vitenskapelig)
    Abstract [en]

    This report presents a method for constructing the mid-surface of CAD models of parts requiring tooling for their manufacture. The mid-surface is constructed by sectioning the CAD-model in a sufficient number of places along the draft direction. In each section the mid-segments of the sectioned material is constructed. The complete mid-surface is obtained by connecting the individual mid-segments with the closest located mid-segment in the adjacent sections. The intended use of the method is computer implementation to automatically derive the mid-surface from CAD-models to be used as target geometry for FEA shell element meshing. The feasibility of the method is demonstrated by applying it to a CAD-model. In this example a target surface is constructed using both the conventional and the sectioning method. The target surfaces are used to create shell element FEA models.When solved, the natural frequencies of the two models are almost the same. This shows that the sectioning method is an alternative way of creating the target geometry. The intention is to use the method to create an automatic tool for mid-surface extraction with better performance than today's commercially available tools.

    Fulltekst (pdf)
    FULLTEXT01
  • 36.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Datorstödd konstruktion.
    An Automated Design and Advisory System for Pressed-and-Sintered Powder Metallurgy Parts2008Inngår i: Proceedings of the 2008 World Congress on Powder Metallurgy & Particulate Materials, June 8–12, Washington, D.C. United States, Princeton, NJ, United States: MPIF , 2008Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The aim of the present paper is to dissolve the bottleneck for PM market expansion caused by lack of knowledge among designers about PM-specific design principles by proposing an automated PM-part advisory system. The system, called PM-Wizard, checks that a PM-part design suggestion represented as any 3D solid CAD-model complies with the geometrical design rules and recommendations for PM-parts. The system consists of a rule-base hosted by a modern commercial CAD/CAE-system and a programmed algorithmic procedure that converts the design suggestion into a specially developed format. The format enables the automated evaluation of the PM-part in the receiving CAD/CAE-system informing the designer on how the geometry should be revised to facilitate the pressing. The conversion algorithm has been tested on a large number of PM-parts, and the result is that all the tested parts can be converted into the proposed format and successfully evaluated.

  • 37.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Datorstödd konstruktion.
    CAD-Model Parsing for Automated Design and Design Evaluation2008Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Product development has both innovative and analytic sides. Starting from the requirements, a design suggestion is generated. In order to assess how well the envisioned design fulfils the requirements, it is sometimes necessary to build a computer model of it for the analysis. The overall motivation of the work presented is to reduce the time spent on creating the model by reusing knowledge gained from developing similar products by suggesting, building and evaluating IT-systems. To verify the systems real design examples, obtained from companies that have participated in the research projects have been used.

    The work is based on two major application examples. The first, involving the automated geometrical idealisation of die-cast parts (Paper I-III), and the second involving manufacturability of powder metallurgy pressed and sintered parts (Paper IV-VI). The work starts from the point in the product development process where it exists a design suggestion represented as an arbitrary format CAD-model. In the powder metallurgy case the object is to secure that the geometry is suitable for the production process. In the die-casting case the object is to automatically create an idealised version of the model for shell elements meshing. These two tasks have previously been treated as two separate cases, addressed by completely different software. This thesis suggests a common method for addressing the two cases. The method is based on converting the CAD-models, using the geometrical restrictions of the production processes, into a format with a specialised feature structure, parameterisation and construction history using a feature recognition approach. The features are then automatically reconstructed in a target CAD-system. The resulting, specialised CAD-model can be used for automated design and design evaluation purposes, demonstrated in the thesis. The models are therefore called DAR (Design Automation Ready)-models. The DAR-models are useful in that they separate the conversion from the subsequent treatment of the models providing modularisation, flexibility and user insight in the model structure. In that a construction history and parameterisation have be constructed in the target CAD-system, the advanced geometry manipulation and means for knowledge management often provided in modern CAD-systems can be accessed in a transparent and user manageable way. This extends the usefulness of the CAD-systems from involving only interactive work to managing all components sharing the same production process.

    Fulltekst (pdf)
    FULLTEXT01
  • 38.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Designing Material Standards2012Inngår i: Proceedings of DESIGN 2012, the 12th International Design Conference, Dubrovnik, Croatia / [ed] D. Marjanovic, M. Storga, N. Pavkovic & N. Bojcetic, The Design Society, 2012, s. 1133-1140Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Material standards are currently developed though building consensus and voting in organisations like ISO and ASME. If these organisations adopted methods from design in the development process of standards, the user perspective could be added greatly improving the usefulness of the standards. This paper attempts to fi nd the user requirements on material standards and evaluates how well it has been met in four different existing standards. The result is that the end user perspective has been forgotten to a varying extent, leaving plenty of room for improvements which is discussed in the paper.

  • 39.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling.
    Framtidens ingenjörer måste tänka cirkulärt! [bloggpost]2023Annet (Annet (populærvitenskap, debatt, mm))
    Abstract [sv]

    Ingress: Övergången till det cirkulära samhället har börjat. För tekniska högskolor och deras ingenjörsutbildningar innebär det stora förändringar.

  • 40.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Maskinteknik. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Datorstödd konstruktion.
    From CAD to FEA: A design automation perspective2006Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    CAD-models of parts produced by injection moulding or die-casting are often complex making the task of automated geometrical idealisation for finite element analysis difficult. Conventional tools for geometric idealisation are not ideal for the task, as will be shown in the thesis. To address the idealisation problem, this thesis proposes a novel method of creating geometric idealisations of CAD-models for finite element analysis. Knowledge about the production and design processes is used to support the idealisations. The key idea is to simplify the idealisation problem by using the fact that die-cast and injection-moulded parts have a clearly defined tooling draft direction. It is primarily the mid-surfaces of the thin-walled geometry that are extracted for shell element meshing. The ideas have been tested by the creation of a CAD-integrated system that reads the construction history tree of the CAD-model and creates an idealised geometry in the same CAD-model automatically. It is also shown how the system can be used for idealising neutral format files by creating a virtual construction history tree in interaction with the user. The system is named CASTING (CAd Supported Tool for Idealisation of Geometry). The overall objective is to save time in the idealisation step, thereby freeing time for more creative work in the design process.

  • 41.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Maskinteknik. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Datorstödd konstruktion.
    Identifying Features in Cad-Models for Powder Metallurgy Component Evaluation2008Inngår i: Proceedings of the Design 2008, 10th International Design Conference, 2008, s. 689-696Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper presents a newly developed CAD-integrated system for the manufacturability evaluation of designs of powder metallurgy (PM) pressed and sintered parts. The contribution of the paper is the automated reconstruction of a specialized construction history tree from any CAD-model directly in the receiving CAD-system. The reconstruction is based on the geometrical restrictions of the shapes that can be manufactured by the PM process. This facilitates the creation of a transparent and user-revisable rule-base to evaluate the parts manufacturability, which is shown. It will enable designers to get feedback on their designs, reducing the number of design loops with the PM-parts supplier needed before the parts geometry can be established.

  • 42.
    Stolt, Roland
    Jönköping University, Tekniska Högskolan, JTH, Produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling. Jönköping University, Tekniska Högskolan, JTH, Produktutveckling, produktion och design, JTH, Produktionsutveckling.
    Integrating the design of the product life cycle by a master bill of materials2023Inngår i: Leveraging transdisciplinary engineering in a changing and connected world: Proceedings of the 30th ISTE International Conference onTransdisciplinary Engineering, Hua Hin Cha Am, Thailand, July 11–14, 2023 / [ed] P. Koomsap, A. Cooper & J. Stjepandić, Amsterdam: IOS Press, 2023, s. 33-41Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    A bill of materials (BOM) is a representation of the structure of parts and components in a product. The most well-known ones are the engineering (EBOM) and the manufacturing (MBOM). However, there are several more with various purposes throughout the lifecycle of the product. All BOMs are related to the part and component structure of the product but focus on different life cycle phases. They are often individually defined in product development creating a fragmented process. In this paper it is proposed to instead define a “master BOM” It is cross functional and includes all life cycle items. The master BOM has impact on the IT environment of a company as well as the organization of the work. In this paper, the creation and management of BOMs have been investigated in an industrial company. The IT environment of the company is currently heterogeneous, but there is a change towards a PLM centric environment. Results indicate that changing the IT environment and the structure of BOMs can integrate the different domains of the company better and facilitate the early phase assessment of the environmental impact of the products.

  • 43.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Datorstödd konstruktion. Högskolan i Jönköping, Tekniska Högskolan, JTH, Maskinteknik.
    Managing Product and Process Knowledge in CAD-Systems2009Inngår i: NordPLM'09: Proceedings of the 2nd Nordic Conference on Product Lifecycle Management / [ed] Johan Malmqvist and Göran Gustafsson, Göteborg: Chalmers University of Technology , 2009, s. 51-61Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In order to codify, manage, and reuse the knowledge gained from pursing product development projects, CAD-programs have started to provide functionality for supporting this activity. Since the primary purpose of the CAD program is to interactively define geometry, the functionality has been integrated primarily to be used on the parameters of the CAD-model of the design instance. This paper explores how the functionality can be used in a broader scope, managing and automatically reusing knowledge for all designs intended for a certain production process. This is facilitated by automatically converting an arbitrary CAD-model of a design to a format that is accessible for knowledge handling and reuse functionality in the CAD-system. A conversion algorithm for the processes die-casting and powder metallurgy pressing sintering is presented, as well as showing how the knowledge can be represented in the CAD-system. This will allow engineers to actively participate in the knowledge build-up and insure that the general knowledge can be handled in the companies’ IT-infrastructure.

  • 44.
    Stolt, Roland
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Maskinteknik. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Datorstödd konstruktion.
    Reusing CAD-models of Die-cast products for FEA2006Inngår i: NAFEMS Seminar: Prediction and Modelling of Failure Using FEA, 2006Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Parts for trimmers, lawnmowers and chainsaws are often manufactured by die-casting in light alloys. These parts often have a complex geometry with thin-walled regions mixed with regions of non thin-walled geometry. This paper discusses the process of creating FEA-models from CAD-models of such parts. The objective of the FEA, in the particular case described in this paper, is to predict the performance of the complete products. Since a FEA-model of the complete product require extensive computational power to solve, it is necessary to keep the computational cost down by f. ex using shell-elements instead of solid-elements where applicable.

    The creation of the shell-element mesh based on the solid CAD-model can be time consuming, especially if the CAD-model is complicated as often the case in real products. To aid in the creation of the shell-element mesh there is commercial software available for the extraction of the mid-surfaces in the CAD-model. In this paper two different software for mid-surface extraction are tested, both included in pre-processors for high-end FEA solvers. The software was tested on six different die-cast or injection moulded parts, all components in consumer products available on the market.

    The result is that the software can extract the individual mid-surfaces well but the connections between them are often not created properly.

    Furthermore the software cannot, as expected, deal with the regions that divert too much from being thin-walled. This paper present an idea on how treat these regions by retrieving suitable representations from a depository of representations known from experience to represent the geometry well and insert them in the appropriate position in the FEA-model automatically.

    To show the feasibility of the idea a demonstrator program created in CATIA V5 using VBA is also presented in this paper.

  • 45.
    Stolt, Roland
    et al.
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Konstruktion och produktutveckling. Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design, JTH, Produktionsutveckling.
    André, Samuel
    Jönköping University, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Requirements Handling in Multidisciplinary Product Development - A Company Study2022Inngår i: Transdisciplinarity and the Future of Engineering / [ed] B. R. Moser, P. Koomsap, J. Stjepandić, IOS Press, 2022, s. 115-124Konferansepaper (Fagfellevurdert)
    Abstract [en]

    When developing new products there are a multitude of requirements from different domains to consider making it a multidisciplinary activity. It involves stakeholders from the company and from the broader society. Requirements come from for example the customers, the production facility, suppliers, and governmental agencies placing safety and environmental regulations on the product. To manage all these heterogeneous requirements, a need of formalization and support emerges. The requirements can be managed using IT support. This functionality is often provided in contemporary PLM-systems. In this paper, it is investigated how a large industrial company with in-house design and manufacturing of consumer products formalize the requirements and handles them through the product development stages. The study involves corporate documents and interviewing staff from several departments of the company. Results show that while some aspects such as compliance with health and safety regulations are well supported, others are being addressed differently in each project with little formalization and IT support. This increases the risk of extra iterations in the development process. The paper discusses how to mitigate those risks and highlights some areas of possible improvement of the practices and IT support in product - as well as in production development.

  • 46.
    Stolt, Roland
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    André, Samuel
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Introducing Inserts for Die Casting Manufactured by Selective Laser Sintering2018Inngår i: Global Integration of Intelligent Manufacturing and Smart Industry for Good of Humanity / [ed] Dušan Šormaz, Gürsel Süer, F. Frank Chen, Elsevier, 2018, s. 309-316Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The advances in additive manufacturing (AM) for high grade steels has in some cases made it possible to manufacture die inserts for demanding processes like high pressure die casting (HPDC). However, several challenges remain before this becomes commonplace. There is still a need of secondary manufacturing steps on the insert after printing. Also, extensive design changes must be made on the die inserts to fully utilize the advantages of AM. Further, the die insert is only one of many parts needed in the die assembly. Much of the die manufacturing will still be done by conventional methods. In this paper, several companies involved in the manufacturing and use of dies for HPDC have been interviewed on that they think is the future role of AM in their business. The result is that the effect of just printing the inserts would will be quite limited at present. Bringing down the time spent on die manufacture is important since that time then could be spent on improving the manufacturability of the parts.

  • 47.
    Stolt, Roland
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    André, Samuel
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Andersson, Petter
    GKN Aerospace AB.
    Early stage assessment of the inspectability of welded components: A case from the aerospace industry2016Inngår i: Proceedings of the 7th International Swedish Production Symposium, 2016Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper proposes a method to indicate potential problems when planning dye penetrant and x-ray inspection of welded components. Inspection has been found to be an important part of the manufacturability evaluation made in a large CAD-based parametric environment for making multidisciplinary design simulations in early stages of design at an aircraft component manufacturer. The paper explains how the proposed method is to be included in the design platform at the company. It predicts the expected probability of detection of cracks (POD) in situations where the geometry of the parts is unfavourable for inspection so that potential problems can be discovered and solved in early stages. It is based on automatically extracting information from CAD-models and making a rule-based evaluation. It also provides a scale for how favourable the geometry is for inspection. In the paper it is also shown that the manufacturability evaluation need to take into consideration the expected stresses in the structures, highlighting the importance of multi-disciplinary simulations.

    Fulltekst (pdf)
    fulltext
  • 48.
    Stolt, Roland
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    André, Samuel
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Andersson, Petter
    GKN Aerospace Sweden, Sweden.
    Introducing Welding Manufacturability in a Multidisciplinary Platform for the Evaluation of Conceptual Aircraft Engine components2017Inngår i: International Journal of Product Lifecycle Management, ISSN 1743-5110, E-ISSN 1743-5129, Vol. 10, nr 2, s. 107-123Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Computer simulations play an important role for evaluating designs in an early stages leading to that more informed decisions can be taken and thereby reducing the risk of costly re-design. In this paper, a platform currently in operation at aeronautical company for doing extensive automated multiobjective design parameter studies on conceptual designs of aircraft engine components is studied. In the paper, an extension of the capability of the platform into making a rule-based evaluation of the welding manufacturability of the conceptual designs is proposed. The extension is tested by a prototype system at the air-craft manufacturer showing the relation between the design parameters and the manufacturability of the components. The results are presented as a manufacturability index showing what trade-offs with other performance criteria of the engine that can be made. It is shown that the manufacturability evaluation can be integrated in the knowledge value stream and supports a set-based concurrent engineering approach in the company.

    Fulltekst (pdf)
    fulltext
  • 49.
    Stolt, Roland
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    André, Samuel
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Andersson, Petter
    GKN Aerospace AB.
    Manufacturability assessment in the conceptual design of aircraft engines – building knowledge and balancing trade-offs2015Inngår i: Product Lifecycle Management in the Era of Internet of Things / [ed] Bouras, A., Eynard, B., Foufou, S., Thoben, K.-D., Springer, 2015, s. 407-417Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper addresses the automated assessment of manufacturability of air-craft engine components in the early stages of design, focused on the welding process. It is a novel part of a multi-objective decision support tool for design evaluation, currently running at a manufacturer of jet engine components. The paper briefly describes the tool and how it impacts the product development process. Further, the paper presents an integrated method for manufacturability assessment by finding welding processes that complies with all geometrical and other constraints found in the CAD-models of the conceptual engine. Here, preferences made by manufacturing engineers serves as a base for a manufacturability index so that different parameter settings in the CAD-models can be compared to find the best parameter settings, considering the trade-off with other performance criteria’s of the engine.

  • 50.
    Stolt, Roland
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    André, Samuel
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Johansson, Joel
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Poorkiany, Morteza
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion.
    Managing Risk in the Introduction of New Technology in Products2015Inngår i: Journal of Aerospace Operations, ISSN 2211-002X, Vol. 3, nr 3-4, s. 167-184Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In this paper interviews with staff involved in product development from four different companies is presented. The objective is to find out how the companies manage the technical risk of introducing new technology in products and how they prepare for meeting changing requirements from customers. The companies originates from aerospace, automotive and production engineering. Based on the results of the first study, a case study was carried out at the aerospace company. The studies shows that, the introduction of new technology varies with the risk of failure in the validation of the products. Companies that easily can revert back to the former technology is more risk taking. The types of products and the companies’ place in the supply chain has an impact on technology introduction and requirements handling. The companies have strategies for developing requirement specifications prior to the start of the project. This is most elaborate at the aerospace company where a thorough concept evaluation clarify possible variations in requirements.

    Fulltekst (pdf)
    fulltext
12 1 - 50 of 63
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