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Convex Decomposition of 3D Solid Models for Automated Manufacturing Process Planning Applications

[+] Author Affiliations
Ata A. Eftekharian, Matthew I. Campbell

University of Texas at Austin, Austin, TX

Paper No. DETC2012-70278, pp. 727-735; 9 pages
doi:10.1115/DETC2012-70278
From:
  • ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 2: 32nd Computers and Information in Engineering Conference, Parts A and B
  • Chicago, Illinois, USA, August 12–15, 2012
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-4501-1
  • Copyright © 2012 by ASME

abstract

A new method of decomposing 3D solid models for use in automated manufacturing process planning applications is presented in this paper. The resulting algorithm, which is implemented and interacts with a larger suite of planning tools, is based on dividing complex volumes into convex sub-volumes. In order to ensure that the resulting convex sub-volumes are compact and feasible for machining operations, a set of heuristics are developed to categorize, order, and determine splitting directions of the concave edges. Each of the resulting convex sub-volumes represents material that is to be removed from the bounding-box to create the intended work-piece. The set of sub-volumes represents a compound solid (i.e. decomposed solid) that is converted into graph of boundary representation (B-rep) primitives and is reasoned about in a subsequent search process. The algorithm has been implemented and tested on a variety of solid models resembling real automotive parts, and results show the effectiveness and efficiency of the algorithm.

Copyright © 2012 by ASME

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