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Jonsson, C.-J., Stolt, R. & Elgh, F. (2023). A case-based reasoning method including tooling function for case retrieval and reuse in stamping tooling design. Computer-Aided Design and Applications, 20(5), 839-855
Open this publication in new window or tab >>A case-based reasoning method including tooling function for case retrieval and reuse in stamping tooling design
2023 (English)In: Computer-Aided Design and Applications, ISSN 1686-4360, Vol. 20, no 5, p. 839-855Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
CAD solutions, 2023
Keywords
Sheet metal forming, Case-based reasoning, CBR, Genetic algorithm, CAD model, Tooling design
National Category
Production Engineering, Human Work Science and Ergonomics Computer Engineering
Identifiers
urn:nbn:se:hj:diva-59422 (URN)10.14733/cadaps.2023.839-855 (DOI)2-s2.0-85146746907 (Scopus ID)GOA;;59422 (Local ID)GOA;;59422 (Archive number)GOA;;59422 (OAI)
Available from: 2023-01-23 Created: 2023-01-23 Last updated: 2023-02-06Bibliographically approved
Stolt, R. (2023). Framtidens ingenjörer måste tänka cirkulärt! [bloggpost]. Jönköping: Jönköping University
Open this publication in new window or tab >>Framtidens ingenjörer måste tänka cirkulärt! [bloggpost]
2023 (Swedish)Other (Other (popular science, discussion, etc.))
Abstract [sv]

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

Place, publisher, year, pages
Jönköping: Jönköping University, 2023
Series
Vertikals
Keywords
cirkulärt, hållbarhet
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
urn:nbn:se:hj:diva-63665 (URN)
Note

Publicerad 15 november 2023 på bloggen Vertikals.se.

Available from: 2024-02-22 Created: 2024-02-22 Last updated: 2024-02-22Bibliographically approved
Stolt, R. (2023). Integrating the design of the product life cycle by a master bill of materials. In: P. Koomsap, A. Cooper & J. Stjepandić (Ed.), 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 (pp. 33-41). Amsterdam: IOS Press
Open this publication in new window or tab >>Integrating the design of the product life cycle by a master bill of materials
2023 (English)In: 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, p. 33-41Chapter in book (Refereed)
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.

Place, publisher, year, edition, pages
Amsterdam: IOS Press, 2023
Series
Advances in Transdisciplinary Engineering, ISSN 2352-751X, E-ISSN 2352-7528 ; 41
Keywords
"Product Life cycle Management", "Bill of Material", Platform, integration, "Information management", BOM
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
urn:nbn:se:hj:diva-62879 (URN)10.3233/ATDE230595 (DOI)2-s2.0-85184304768 (Scopus ID)978-1-64368-440-6 (ISBN)978-1-64368-441-3 (ISBN)
Funder
Knowledge Foundation
Available from: 2023-11-15 Created: 2023-11-15 Last updated: 2024-02-20Bibliographically approved
Stolt, R. & Arjomandi Rad, M. (2023). Transiting Between Product Development and Production: How IT in Product Development and Manufacturing Integrate. In: F. Noël, F. Nyffenegger, L. Rivest and A. Bouras (Ed.), IFIP Advances in Information and Communication Technology: . Paper presented at 19th IFIP WG 5.1 International Conference on Product Lifecycle Management, PLM 2022 Grenoble 10 July 2022 through 13 July 2022 (pp. 136-143). Springer, 667
Open this publication in new window or tab >>Transiting Between Product Development and Production: How IT in Product Development and Manufacturing Integrate
2023 (English)In: IFIP Advances in Information and Communication Technology / [ed] F. Noël, F. Nyffenegger, L. Rivest and A. Bouras, Springer, 2023, Vol. 667, p. 136-143Conference paper, Published paper (Refereed)
Abstract [en]

One crucial moment in product development is when all specifications of a product are ready, and the start of production is imminent. Companies very often have a milestone gate at this point where the development project is signed off and approved making sure that everything is ready and handing it over to the production department. This is a crucial moment involving checking a lot of information that has originated from different departments in the company. It can result in errors since the checking often is done manually and based on that staff check and report the results to a central function managing the transition. The situation is worsened by interoperability problems between different IT systems and databases used for different purposes in the company. In this paper it is examined how an automotive company currently is conducting the handover, gathering and checking all specifications before start of production. Risks of mistakes and unnecessary time loss are identified. In the paper it is discussed how the integration can be improved and the amount of manual work reduced. Results indicate that there is a potential for both saving time and reducing risk of error by automating parts of the handing over and integrating the IT systems and databases.

Place, publisher, year, edition, pages
Springer, 2023
Series
IFIP Advances in Information and Communication Technology, ISSN 1868-4238, E-ISSN 1868-422X ; 667
Keywords
Interoperability, Specifications, Automotive companies, Development programmes, Hand over, IT system, Stage gates, Product development, Production, Stage-gate
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:hj:diva-60138 (URN)10.1007/978-3-031-25182-5_14 (DOI)2-s2.0-85151050011 (Scopus ID)978-3-031-25181-8 (ISBN)978-3-031-25182-5 (ISBN)
Conference
19th IFIP WG 5.1 International Conference on Product Lifecycle Management, PLM 2022 Grenoble 10 July 2022 through 13 July 2022
Available from: 2023-04-13 Created: 2023-04-13 Last updated: 2024-02-09Bibliographically approved
Arjomandi Rad, M., Salomonsson, K., Cenanovic, M., Balague, H., Raudberget, D. & Stolt, R. (2022). Correlation-based feature extraction from computer-aided design, case study on curtain airbags design. Computers in industry (Print), 138, Article ID 103634.
Open this publication in new window or tab >>Correlation-based feature extraction from computer-aided design, case study on curtain airbags design
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2022 (English)In: Computers in industry (Print), ISSN 0166-3615, E-ISSN 1872-6194, Vol. 138, article id 103634Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
Elsevier, 2022
Keywords
CAD/CAE, Curtain Airbag, Design Automation, Feature extraction, Machine Learning, Medial Axis, Parametric models, Regression Analysis, Computer aided design, Computer aided engineering, Extraction, Forecasting, Iterative methods, Large dataset, Sleep research, Computer-aided design, Computer-aided design/CAE, Design automations, Design parameters, Design-process, Features extraction, Machine-learning, Medial axes, Regression modelling
National Category
Vehicle Engineering
Identifiers
urn:nbn:se:hj:diva-55973 (URN)10.1016/j.compind.2022.103634 (DOI)000772755800002 ()2-s2.0-85124806561 (Scopus ID)HOA;;798384 (Local ID)HOA;;798384 (Archive number)HOA;;798384 (OAI)
Funder
Knowledge Foundation, 20180189
Available from: 2022-03-03 Created: 2022-03-03 Last updated: 2022-05-25Bibliographically approved
Arjomandi Rad, M., Raudberget, D. & Stolt, R. (2022). Data-driven and Real-time Prediction Models for Highly Iterative Product Development Processes. In: B. R. Moser, P. Koomsap, J. Stjepandić (Ed.), Transdisciplinarity and the Future of Engineering: . Paper presented at 29th ISTE International Conference on Transdisciplinary Engineering, 2022, MI, MA, USA (pp. 463-472). IOS Press
Open this publication in new window or tab >>Data-driven and Real-time Prediction Models for Highly Iterative Product Development Processes
2022 (English)In: Transdisciplinarity and the Future of Engineering / [ed] B. R. Moser, P. Koomsap, J. Stjepandić, IOS Press, 2022, p. 463-472Conference paper, Published paper (Refereed)
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.

Place, publisher, year, edition, pages
IOS Press, 2022
Series
Advances in Transdisciplinary Engineering ; 28
Keywords
Data-driven, Prediction models, Design automation, Simulation-driven design, CAD/CAE
National Category
Computer Sciences
Identifiers
urn:nbn:se:hj:diva-56575 (URN)10.3233/ATDE220676 (DOI)2-s2.0-85142195146 (Scopus ID)978-1-64368-338-6 (ISBN)978-1-64368-339-3 (ISBN)
Conference
29th ISTE International Conference on Transdisciplinary Engineering, 2022, MI, MA, USA
Available from: 2022-05-25 Created: 2022-05-25 Last updated: 2022-11-30Bibliographically approved
Säfsten, K., Elgh, F., Rösiö, C. & Stolt, R. (2022). Integrated product and production platforms: Towards a research agenda. In: A. H. C. Ng, A. Syberfelt, D. Högberg & M. Holm (Ed.), SPS2022: Proceedings of the 10th Swedish production symposium: . Paper presented at 10th Swedish Production Symposium (SPS2022), School of Engineering Science, University of Skövde, Sweden, April 26–29 2022 (pp. 829-841). Amsterdam: IOS Press
Open this publication in new window or tab >>Integrated product and production platforms: Towards a research agenda
2022 (English)In: SPS2022: Proceedings of the 10th Swedish production symposium / [ed] A. H. C. Ng, A. Syberfelt, D. Högberg & M. Holm, Amsterdam: IOS Press, 2022, p. 829-841Conference paper, Published paper (Refereed)
Abstract [en]

Product platforms have been used as a strategy for manufacturing companies to stay competitive and have provided a means that fulfils the need of agile and demand driven product realisation. However, a link to the production system development is often missing. Knowledge is required concerning how a platform approach can be applied in the production domain and integrated with the product platform. The purpose of this paper is to outline a research agenda for integrated product and production platforms. Based on a literature review and empirical material from more than 50 interviews in five manufacturing companies, state-of-the art and state-of-practice is presented, together with a preliminary research agenda. A flexible, although systematic and structured, approach is needed where the product platform and the production platform are well integrated to support agile, and demand driven product realisation. A product realisation process supported by integrated product and production platforms is expected to support the competitiveness of manufacturing companies facing a market characterized by high diversity and rapid change.

Place, publisher, year, edition, pages
Amsterdam: IOS Press, 2022
Series
Advances in Transdisciplinary Engineering, ISSN 2352-751X, E-ISSN 2352-7528 ; 21
Keywords
platform planning, platform development, digitalisation, integration, boundary crossing
National Category
Business Administration Production Engineering, Human Work Science and Ergonomics
Identifiers
urn:nbn:se:hj:diva-57057 (URN)10.3233/ATDE220201 (DOI)2-s2.0-85132807133 (Scopus ID)978-1-64368-268-6 (ISBN)978-1-64368-269-3 (ISBN)
Conference
10th Swedish Production Symposium (SPS2022), School of Engineering Science, University of Skövde, Sweden, April 26–29 2022
Available from: 2022-06-10 Created: 2022-06-10 Last updated: 2022-07-21Bibliographically approved
Jonsson, C.-J., Stolt, R. & Elgh, F. (2022). Method for Task-based Model Retrieval for Reuse in Stamping Tool Design. In: CAD'22 Proceedings: . Paper presented at CAD'22, Beijing, China, July 11-13, 2022 (pp. 189-193).
Open this publication in new window or tab >>Method for Task-based Model Retrieval for Reuse in Stamping Tool Design
2022 (English)In: CAD'22 Proceedings, 2022, p. 189-193Conference paper, Published paper (Refereed)
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.

Series
CAD Proceedings, E-ISSN 2769-8440 ; 2022
Keywords
Sheet Metal, Stamping Tool, Model Retrieval, Knowledge Reuse
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
urn:nbn:se:hj:diva-58238 (URN)
Conference
CAD'22, Beijing, China, July 11-13, 2022
Available from: 2022-08-19 Created: 2022-08-19 Last updated: 2022-08-19Bibliographically approved
Stolt, R. & André, S. (2022). Requirements Handling in Multidisciplinary Product Development - A Company Study. In: B. R. Moser, P. Koomsap, J. Stjepandić (Ed.), Transdisciplinarity and the Future of Engineering: . Paper presented at The 29th ISTE International Conference on Transdisciplinary Engineering, held at the Massachusetts Institute of Technology in Cambridge, United States, from 5 – 8 July 2022 (pp. 115-124). IOS Press
Open this publication in new window or tab >>Requirements Handling in Multidisciplinary Product Development - A Company Study
2022 (English)In: Transdisciplinarity and the Future of Engineering / [ed] B. R. Moser, P. Koomsap, J. Stjepandić, IOS Press, 2022, p. 115-124Conference paper, Published paper (Refereed)
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.

Place, publisher, year, edition, pages
IOS Press, 2022
Series
Advances in Transdisciplinary Engineering, ISSN 2352-751X, E-ISSN 2352-7528 ; 28
Keywords
Consumer products, Environmental regulations, Information services, Life cycle, Product design, Product development, Safety engineering, Different domains, Document management, Formalisation, Multi-disciplinary activities, Multidisciplinary product development, Platform, PLM, Product document management, Product life cycle management, Requirement, Concurrent engineering, PDM, Product Lifecycle Management, Requirements
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
urn:nbn:se:hj:diva-59010 (URN)10.3233/ATDE220638 (DOI)2-s2.0-85142145831 (Scopus ID)978-1-64368-338-6 (ISBN)978-1-64368-339-3 (ISBN)
Conference
The 29th ISTE International Conference on Transdisciplinary Engineering, held at the Massachusetts Institute of Technology in Cambridge, United States, from 5 – 8 July 2022
Available from: 2022-11-30 Created: 2022-11-30 Last updated: 2022-11-30Bibliographically approved
Jarfors, A. E. .., Shashidhar, A. C. G., Yepur, H. K., Steggo, J., Andersson, N.-E. & Stolt, R. (2021). Build strategy and impact strength of slm produced maraging steel (1.2709). Metals, 11(1), 1-20, Article ID 51.
Open this publication in new window or tab >>Build strategy and impact strength of slm produced maraging steel (1.2709)
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2021 (English)In: Metals, ISSN 2075-4701, Vol. 11, no 1, p. 1-20, article id 51Article in journal (Refereed) Published
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. 

Place, publisher, year, edition, pages
MDPI, 2021
Keywords
Additive manufacturing, Fracture, Hatch spacing, Impact energy, Process parameters, Scan speed
National Category
Materials Engineering
Identifiers
urn:nbn:se:hj:diva-51488 (URN)10.3390/met11010051 (DOI)000610508400001 ()2-s2.0-85098650962 (Scopus ID)GOA (Local ID)GOA (Archive number)GOA (OAI)
Funder
Knowledge Foundation, 20160327
Available from: 2021-01-14 Created: 2021-01-14 Last updated: 2021-06-09Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-6278-2499

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