| 1. |
- Cederfeldt, Mikael, 1975, et al.
(author)
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Solid Modelling With Dimensional and Topological Variability
- 2003
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In: ICED03. - Glasgow : The Design Society.
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Conference paper (peer-reviewed)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.
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| 2. |
- Elgh, Fredrik, 1971, et al.
(author)
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An Automated Cost Estimating System for Variant Design Based on the Method of Successive Calculus
- 2003
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In: ICED03.
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Conference paper (peer-reviewed)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.
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| 3. |
- Elgh, Fredrik, et al.
(author)
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An Automatic Cost Estimating System for Variant Design Based on the Method of Successive Calculus
- 2003
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In: Research for Practice - Innovations in Products, Processes and Organisations. - Glasgow : The Design Society. - 1904670008
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Conference paper (peer-reviewed)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.
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| 4. |
- Rask, I, et al.
(author)
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Designer's Pilot : Introducing a Knowledge System for DFM
- 2003
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In: Proceedings of the EVEN Conference on Virtual Engineering Applications for Design and Product Development. - Loughborough : Loughborough University. - 0947974156
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Conference paper (peer-reviewed)
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