Extraction/conversion of geometric dimensions and tolerances for machining features

Jian Gao, De Tao Zheng, Nabil Gindy, Doug Clark

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


It is important for a feature-based system to preserve feature integrity during feature operation, especially when feature interaction occurs. The paper presents a feature conversion approach to convert design features used in a design model into machining features for the downstream applications. This process includes both form features (geometric information) and non-geometric features conversion. Most researchers have concentrated on geometric information extraction and conversion without tackling the important problem of non-geometric feature information. This paper focuses on the extraction and conversion of feature geometric dimensions and tolerances (GD&T) for downstream machining application. The main barrier to the integration of a feature-based CAD/CAPP/CAM system - feature interaction - is discussed in this paper, which alters design features in their geometries and non-geometric information. How to identify and validate these feature dimensions and tolerances is one of the key issues in feature interaction conversion. The development of robust methodologies for preserving feature integrity for use in process planning application is the main thrust of the work reported in this paper. © Springer-Verlag London Limited 2004.

Original languageEnglish
Pages (from-to)405-414
Number of pages10
JournalInternational Journal of Advanced Manufacturing Technology
Issue number4
Publication statusPublished - Aug 2005


  • CAD/CAPP/CAM integration
  • Feature conversion
  • Feature interaction
  • Geometric dimensions and tolerances (GD&T)
  • Machining features


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