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Unformatted text preview: functional characteristics during product and process design is a highly critical problem in industry and it is usually managed by the actors themselves, based on their expertise. A manual resolution of the various impacts is only possible if the product is very simple. For complex product, this evaluation needs to be aided. In this paper, we propose to integrate a qualitative and a quantitative aspect. This quantitative aspect is based on the Key Characteristics approach [Thornton, 1999], the mathematical models of tolerance, and the mathematical tools for tolerance analysis and tolerance synthesis. 2 QUALITATIVE APPROACH TO MANAGE DESIGN TOLERANCES & INTEGRATION OF QUANTITATIVE ASPECT In order to determine quickly the tolerances of parts or subassembly for complex product like aircraft or car body, we propose a method with a graphical tool (this graphical tool is based on assembly graphs).
Product C2i+1 Joints graph Contact graph
T C1i+1 GFR Level i C1i … C3i+1 Level i+1 C1i+1 C2i+1 C3i+1 …
C3i+1 … … Figure 1: Structural graphs. At each level of the decomposition of the product into subassemblies (Figure 1), for an assembly, by using functional analysis method, designers defi...
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- Spring '10
- The Land