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Functional Interface-Based Assembly Modeling

[+] Author Affiliations
James R. Stoddard, Marvin Law

Sigmetrix, LLC

Paper No. IMECE2005-79945, pp. 531-536; 6 pages
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Manufacturing Engineering and Materials Handling, Parts A and B
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Manufacturing Engineering Division and Materials Handling Division
  • ISBN: 0-7918-4223-1 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME


Current CAD system approaches to assembly representation do not support the full range of needs for an assembly model. They cannot account for the natural manufacturing and assembly variability that occurs in the assembled interfaces. The current solvers work well for idealized assembly design behaviors at nominal conditions, but in order to make accurate predictions about assembly performance and product quality the variability of the assembled interfaces must be comprehended in the assembly model. This paper will outline two key issues to support a robust approach to assembly modeling based on characterizing the true mating surface contact between parts in the assembly. These assembly interface definitions are adaptable enough to achieve an exact constraint design to ensure a stable analysis. These approaches are based in kinematic theory and support the efficient solution of the assembly constraints in the presence of geometric variation. An example of this approach within the context of a tolerance analysis application will be presented.

Copyright © 2005 by ASME



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