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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.

  • 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.

  • 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.

  • 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.
    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.

  • 6.
    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.

  • 7.
    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.

  • 8.
    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.

  • 9.
    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.

  • 10.
    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)
  • 11.
    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.

  • 12.
    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.

  • 13.
    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.

  • 14.
    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.

  • 15.
    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)
  • 16.
    Pabolu, Venkata Krishna Rao
    et al.
    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.
    Johansson, Joel
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, 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 (IJASM), ISSN 1741-9174, 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.

  • 17.
    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.

  • 18.
    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.

  • 19.
    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.

  • 20.
    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.

  • 21.
    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.

  • 22.
    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.

  • 23.
    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.

  • 24.
    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.

  • 25.
    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.

  • 26.
    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.

  • 27.
    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.

  • 28.
    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.

  • 29.
    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.

  • 30.
    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.

  • 31.
    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.

  • 32.
    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.

  • 33.
    Stolt, Roland
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Datorstödd konstruktion.
    Bengtsson, Sven
    Höganäs AB.
    Michael, Andersson
    Höganäs AB.
    Using property profiles to support early PM component design2010Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    When designing high performance mechanical parts in PM it is the mechanical and other properties provided per unit of cost that counts for the designers. Therefore, current PM-materials standards MPIF 35 and ISO5755 are confusing since they stress the chemical composition of the powder grade rather than the properties. To clarify, the concept of property profiles is explored in this paper. The basic idea is that rather than selecting a powder grade and prescribe the density, the designer will instead select an appropriate property profile. The PM parts supplier will then understand the requirements for the PM part better and be able to propose a powder and process that will provide exactly the required properties. In addition to simplifying the material and process selection, property profiles will also favour suppliers who strive towards providing precisely the value-adding sides of the PM-part, improving the competiveness of the whole PM-business.

  • 34.
    Stolt, Roland
    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.
    Andersson, Petter
    GKN Aerospace AB, Sweden.
    Design for Inspection: Evaluating the Inspectability of Aerospace Components in the Early Stages of Design2017Inngår i: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 11, s. 1193-1199Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    One important part of the manufacturing process of aerospace components is making inspections using Fluorescent Penetrant Inspection (FPI). This mandatory inspection represents a non-negligible part of the manufacturing and service cost. It is therefore important to make the geometry of the components suitable for inspection i.e. practicing Design for Inspection (DFI). This has been studied at an aerospace company with the aim of bringing DFI to the early stages of product development process. In this paper, a tool is proposed for the evaluation of inspectability in the early design stages. The tool is applied on CAD-models of the components automatically ranking the inspectability of design proposals using a novel inspectability index. Thus, inspectability can be considered together with other performance and manufacturing aspects forming a powerful decision support. The tool has been run and evaluated together with manufacturing staff at the aerospace company with promising results.

  • 35.
    Stolt, Roland
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Heikkinen, Tim
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Design and Evaluation of Aerospace Components for SLM2019Inngår i: Transdisciplinary engineering for complex socio-technical systems: Proceedings of the 26th ISTE International Conference on Transdisciplinary Engineering, July 30 – August 1, 2019 / [ed] K. Hiekata, B. Moser, M. Inoue, J. Stjepandić & N. Wognum, Amsterdam: IOS Press, 2019, s. 147-156Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Currently, the additive manufacturing process SLM (selective laser melting) is of high interest in the aerospace industry for the manufacture of jet engine components. This is driven by several factors such as reducing weight and minimizing the variation in the manufacturing process. In the paper, the state of practice in designing SLM parts is examined showing that there is plenty of opportunity to adapt designs to the process. However, this is often too time consuming in the early stages. By examining the state of art in SLM part design, the paper and identifies the variant specific cost drives that are proposed to be used to rank the manufacturability of different design alternatives for turbine frame aerospace components.

  • 36.
    Stolt, Roland
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Jarfors, Anders E.W.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Material och tillverkning.
    Challenges and Support when Introducing AM in HPDC Tooling2019Inngår i: Transdisciplinary engineering for complex socio-technical systems: Proceedings of the 26th ISTE International Conference on Transdisciplinary Engineering, July 30 – August 1, 2019 / [ed] K. Hiekata, B. Moser, M. Inoue, J. Stjepandić & N. Wognum, Amsterdam: IOS Press, 2019, s. 147-156Konferansepaper (Fagfellevurdert)
    Abstract [en]

    When manufacturing tooling inserts for HPDC (High Pressure Die Casting), several manufacturing steps such as milling, heat treatment, electro discharge machining and finally surface treatment are involved. By instead manufacturing the insert by SLM (Selective laser melting), the process is expected to be quicker and with less material waste compared to the traditional manufacturing. Examples of other expected advantages is higher product variant flexibility and the possibility of making conform cooling channels, extending the die life. However, the insert is part of a die system involving many components. The insert cannot be designed and manufactured without considering the complete die system. This paper seeks how to integrate the insert design in the die assembly design. This is done via an example component and in cooperation with die manufacturing firms. The result is that the printing is a minor step of the total manufacturing process and that special design considerations needs to be taken for an SLM insert. New die concepts are needed that will minimise the amount of material, reduce the tolerance and surface demand and support the subdivision of the die into several printed parts.

  • 37.
    Stolt, Roland
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Heikkinen, Tim
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Elgh, Fredrik
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Industriell produktutveckling, produktion och design.
    Integrating Additive Manufacturing in the Design of Aerospace Components2018Inngår 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. 145-154Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In the aerospace industry, Additive Manufacturing (AM) is quickly gaining ground. When optimizing the design of an AM component, all life-cycle aspects need to be considered. It is by no means limited to the classic weight / stiffness optimization of the topology alone. The AM component design must comply with an array of requirements on for example assembly, maintenance and inspection. In addition, there are the manufacturability requirements and constraints of the printing procedure itself, including component orientation and support structures. In this paper, a proposal on how to integrate the AM design of components with the design of the complete engine structure is presented. To find how the current design process is conducted, an interview study involving design and manufacturing experts has been made at an aerospace company, forming a base for the proposal. The result is that a primary design procedure for the AM component must be made as a separate step involving a limited set of design considerations prior to making a multidisciplinary evaluation of the proposed engine structure.

  • 38.
    Stolt, Roland
    et al.
    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.
    André, Samuel
    Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Datorstödd konstruktion. Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling.
    Heikkinen, Tim
    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.
    How to Challenge Fluctuating Requirements: Results from Three Companies2016Inngår i: Transdisciplinary Engineering: Crossing Boundaries / [ed] Milton Borsato, Nel Wognum, Margherita Peruzzini, Josip Stjepandić and Wim J.C. Verhagen, IOS Press, 2016, s. 1061-1070Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper presents the results from a research project conducted by the research group Computer Supported Engineering Design (CSED) in Jonkoping University in Sweden. The project has the aim of increasing companies’ ability to respond to fluctuating requirements when developing new products and product variants. The companies participating in the project represents automotive, aerospace and production equipment industries. Three different cases of applications have been developed and implemented in the companies. Product models ranging from product to knowledge centered for use in the company’s product and technology platforms have been demonstrated and evaluated though interviews with professionals at the companies. To summarize, the results shows that the companies’ abilities to respond to fluctuating requirements have increased albeit concerns have been raised on the maintenance of knowledge in the implementations.

  • 39.
    Stolt, Roland
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Maskinteknik. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Datorstödd konstruktion. Produktutveckling.
    Sunnersjö, Staffan
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Maskinteknik. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Datorstödd konstruktion.
    Automatic preparation of CAD-generated solid geometry for FE-meshing2005Inngår i: NAFEMS World Congress 2005, 2005, s. 101-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In recent years the computing power and meshing algorithms have developed to a state where FEA problems can often be solved directly using the solid geometry. However for complex geometry and complicated calculations there will for the foreseeable future be a need for geometrical idealizations.

    To reduce the time spent on making geometrical idealizations in repetitive FEA, a CAD-integrated KBES (Knowledge Based Engineering System) has been developed. The KBES creates a surface idealization from a thin-walled solid by utilizing generic modelling knowledge and by registering information about the CAD-specific features which the designer uses to define the solid geometry. From this information a corresponding surface idealization is created in the same CAD-system. This allows an updated and parametric geometry idealization of the complete CAD-geometry to be created with a degree of automation directly in the CAD-system.

    Primarily the mid-surfaces oriented in the tooling draft direction are created by evaluating the sketches which the features of the CAD-model are based on. The KBES also trims the created surfaces, thus facilitating the subsequent meshing.

    The KBES has been developed in CATIA V5 (Dassault systemes). It contains rules defined in CATIA knowledgeware which trigger sequential routines written in VBA (Visual Basic for Applications). An industrial application example where the system is used to automatically create a surface idealization for a die-cast part is also presented.

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