An extended schema and its production rule-based algorithms for assembly data exchange using IGES

  • Kai-Mo Hu
  • Bin Wang
  • Yong Liu
  • Jing Huang
  • Jun-Hai Yong
Original Article

Abstract

Assembly data exchange and reuse play an important role in CAD and CAM in shortening the product development cycle. However, current CAD systems cannot transfer mating conditions via neutral file format, and their exported IGES files are heterogeneous. In this paper, a schema for the full data exchange of assemblies is presented based on IGES. We first design algorithms for the pre-and-post processors of parts based on solid model, in which the topologies are explicitly specified and will be referred by mating conditions, and then extend the IGES schema by introducing the Associativity Definition Entity and Associativity Instance Entity defined in IGES standard, so as to represent mating conditions. Finally, a production rule-based method is proposed to analyze and design the data exchange algorithms for assemblies. Within this schema, the heterogeneous representations of assemblies exported from different CAD systems can be processed appropriately, and the mating conditions can be properly exchanged. Experiments on the prototype system verify the robustness, correctness, and flexibility of our schema.

Keywords

IGES Mating conditions Directed acyclic graph Production rules 

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Copyright information

© Springer-Verlag London Limited 2011

Authors and Affiliations

  • Kai-Mo Hu
    • 1
    • 2
    • 3
    • 4
  • Bin Wang
    • 1
    • 3
    • 4
  • Yong Liu
    • 1
    • 2
    • 3
    • 4
  • Jing Huang
    • 1
  • Jun-Hai Yong
    • 1
    • 3
    • 4
  1. 1.School of SoftwareTsinghua UniversityBeijingPeople’s Republic of China
  2. 2.Department of Computer Science and TechnologyTsinghua UniversityBeijingPeople’s Republic of China
  3. 3.Key Laboratory for Information System SecurityMinistry of EducationBeijingPeople’s Republic of China
  4. 4.Tsinghua National Laboratory for InformationScience and TechnologyBeijingPeople’s Republic of China

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