Formation of geometric tolerance zones for polyhedral objects

Utpal Roy, Bing Li

Research output: Chapter in Book/Entry/PoemConference contribution


This paper presents a scheme for establishing geometrictolerance zones for polyhedral objects in solid modelers. Theproposed scheme is based on a surface-based variational model.Variations are applied to a part model by varying each surface'smodel variables. Those model variables are constrained bysome algebraic relations derived from the specified geometrictolerances. For size tolerance, two types of tolerance zones areconsidered in order to reflect two different types of sizetolerances. For any other geometric tolerance (form, orientationor positional), the resultant tolerance zone is defined by thecombination of size tolerance and that particular geometrictolerance specifications. Appropriate algebraic constraints (onthe model variables) are finally used to establish the tolerancezone boundaries in the surface-based variational model.

Original languageEnglish (US)
Title of host publication23rd Design Automation Conference
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791880449
StatePublished - 1997
EventASME 1997 Design Engineering Technical Conferences, DETC 1997 - Sacramento, United States
Duration: Sep 14 1997Sep 17 1997

Publication series

NameProceedings of the ASME Design Engineering Technical Conference


ConferenceASME 1997 Design Engineering Technical Conferences, DETC 1997
Country/TerritoryUnited States


  • Geometric tolerance
  • Tolerance zone
  • Variational model

ASJC Scopus subject areas

  • Mechanical Engineering
  • Computer Graphics and Computer-Aided Design
  • Computer Science Applications
  • Modeling and Simulation


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