| 1. |
- Amen, Rafael, et al.
(författare)
-
Matching Design Tasks To Knowledge Based Software Tools
- 1999
-
Ingår i: Proceedings of the 1999 ASME Design Engineering Technical Conferences.. - New York : American Society of Mechanical Engineers.
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)
|
|
| 2. |
- Amen, Rafael, et al.
(författare)
-
Solidhandboken
- 1996
-
Rapport (populärvet., debatt m.m.)
|
|
| 3. |
|
|
| 4. |
- Cederfeldt, Mikael, 1975, et al.
(författare)
-
Solid Modelling With Dimensional and Topological Variability
- 2003
-
Ingår i: ICED03. - Glasgow : The Design Society.
-
Konferensbidrag (refereegranskat)abstract
- With the advent of commercial solid modelling systems some fifteen years ago the opportunity for three-dimensional parametric geometry was opened to industry. Today solid modelling systems are the dominating CAD tool among advanced engineering companies, but despite the time and money saving implications, industry has been slow to exploit the parametric capabilities of these systems.One reason for the slow adoption of parametric modelling is that originally many solid modellers suffered from lack of stability under parametric changes. This situation is now changed and if a model in a modern CAD system collapses, this is usually due to modelling deficiencies rather than numerical failures. Straightforward dimensional variations rarely cause any problems, but to fully exploit the parametric capability for complex features with a variable topology, there is a need for a systematic approach to build stable and purposeful parametric models.The purpose of this work is to discuss how different modelling approaches relate to the ease of use and robustness of the CAD model in terms of creating variants and product families. We use the term Design for Variability, DFV, for a modelling approach that ensures that parametric models are well suited for variation design.
|
|
| 5. |
- Elgh, Fredrik, 1971, et al.
(författare)
-
An Automated Cost Estimating System for Variant Design Based on the Method of Successive Calculus
- 2003
-
Ingår i: ICED03.
-
Konferensbidrag (refereegranskat)abstract
- For many products the adaption to customer specifications is essential and requires flexible product design and manufacture while maintaining competitive pricing. A large category of design work in industry has the character of redesign of an existing product concept in terms of dimensional changes, topology variations and configuration of components. In order to evaluate design proposals, costs, which are controlled by the product design, selected materials and manufacturing processes, need to be estimated. Cost estimates are normally based on the manufacturing process plans, which can only be formed when production preparation is finalised. The widespread industrial use of solid modelling opens up new possibilities to automate this process. The purpose of this work is to demonstrate and test a method to extract product information from a CAD model to allow process planning and cost calculation to be carried out automatically for a given class of products. With such a system cost estimates can be made available to the designer the instant a design proposal has been presented. This allows for design iterations to be carried out in order to govern the design work towards solutions with an optimal balance between product and production properties.
|
|
| 6. |
- Elgh, Fredrik, et al.
(författare)
-
An Automatic Cost Estimating System for Variant Design Based on the Method of Successive Calculus
- 2003
-
Ingår i: Research for Practice - Innovations in Products, Processes and Organisations. - Glasgow : The Design Society. - 1904670008
-
Konferensbidrag (refereegranskat)abstract
- For many products, the adaption to customer specifications is essential and requires flexible product design and manufacture while maintaining competitive pricing. A large category of design work in industry has the character of the redesigning of an existing product concept in terms of dimensional changes, topology variations and the configuration of components. In order to evaluate design proposals, costs, controlled by the product design, selected materials and manufacturing processes, need to be estimated. Cost estimates are normally based on the manufacturing process plans. They, in turn, can only be formed when production preparation is finalised. The widespread industrial use of solid modelling opens up new possibilities for automating this process. The purpose of this work is to demonstrate and test a method of extracting product information from a CAD model in order to allow process planning and cost calculation to be carried out automatically for a given class of products. With such a system, cost estimates can be made available to the designer the instant a design proposal has been presented. This allows design iterations to be carried out, in order to govern the design work towards solutions with an optimal balance between product and production properties.
|
|
| 7. |
|
|
| 8. |
- Elgh, Fredrik, et al.
(författare)
-
An Ontology Approach To Collaborative Engineering For Producibility
- 2007
-
Ingår i: International Journal of e-collaboration. - 1548-3673 .- 1548-3681. ; 3:4, s. 21-45
-
Tidskriftsartikel (refereegranskat)abstract
- With today’s high product variety and shorter life cycles in automobile manufacturing, every new car design must be adapted to existing production facilities so that these facilities can be used for the manufacturing of several car models. In order to ensure this, collaboration between engineering design and production engineering has to be supported. Sharing information is at the core of collaborative engineering. By implementing an ontology approach, work within domains requirement management, engineering design and production engineering can be integrated. An ontology approach, based on an information model implemented in a computer tool, supports work in the different domains and their collaboration. The main objectives of the proposed approach are: supporting the formation of requirement specifications for products and processes, improved and simplified information retrieval for designers and process planners, forward traceability from changes in product systems to manufacturing systems, backward traceability from changes in manufacturing system to product systems, and the elimination of redundant or multiple versions of requirement specifications by simplifying the updating and maintenance of the information.
|
|
| 9. |
- Elgh, Fredrik, et al.
(författare)
-
Collaborative Engineering for Enhanced Producibility by Ontology-based Integration of Design and Production
- 2009
-
Ingår i: Virtual Team Leadership and Collaborative Engineering Advancements. - Hershey : Information Science Reference. - 9781605661100
-
Bokkapitel (refereegranskat)abstract
- Many companies base their business strategy on customized products with a high level of variety and continuous functional improvements. For companies to be able to provide affordable products in a short time and be at the competitive edge, every new design must be adapted to existing production facilities. In order to ensure this, collaboration between engineering design and production engineering has to be supported. With the dispersed organisations of today combined with the increasing amount of information that has to be shared and managed, this collaboration is a critical issue for many companies. In this article, an approach for sharing and managing product and production information is introduced. The results are based on the experiences from a case study at a car manufacturer. By ontology-based integration, work within domains engineering design, production engineering and requirement management at the company was integrated. The main objectives with the integration were: support the formation of requirement specifications for products and processes, improve and simplify the information retrieval for designers and process planners, ensure traceability from changes in product systems to manufacturing systems and vice versa, and finally, eliminate redundant or multiple versions of requirement specifications.
|
|
| 10. |
- Elgh, Fredrik, et al.
(författare)
-
Ontology Based Management of Designer's Guidelines for Motorcar Manufacture
- 2006
-
Ingår i: Challenges in collaborative engineering CCE’06 - State of the Art and Future Challenges in Collaborative Design. - Jönköping : Department of Computer & Electrical Engineering, School of Engineering. - 919756043X ; , s. 71-83
-
Konferensbidrag (refereegranskat)abstract
- With today’s high product variety and shorter life cycles in motor car manufacture, every new car design must be adapted to existing production facilities so that these can be used for several car models. Sharing information is at the core of collaborative engineering. With an ontology approach, the work within the domains requirement management, engineering design and production engineering can be integrated. An ontology approach based on an information model implemented in a computer tool supports the work in the different domains and their collaboration. In our work we make use of the existing structures and link those using appropriately named links. We also propose the introduction of a new structure describing the generic functions of the manufacturing system, MSF. This tree structure is a suitable tool to link product related objects to their associated production equipment at varying levels of detail. The manufacturing requirements are modelled using a concept for the definition of the requirement content, called Manufacturing Requirement (MR). To enable the MR to cover different ranges and levels, and enhance the maintenance of the system integrity, the concept of Requirement Object is introduced. The RO is used to collect the instances for which a specific MR is valid. We also use the rule inference facility to reduce the number of explicitly defined relations.
|
|
