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Adaptive Setup Planning of Prismatic Parts by Tool Accessibility Examination

[+] Author Affiliations
Ningxu Cai, Hsi-Yung Feng

University of Western Ontario

Lihui Wang

National Research Council of Canada

Paper No. IMECE2005-81055, pp. 71-79; 9 pages
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Computers and Information in Engineering
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Computers and Information in Engineering Division
  • ISBN: 0-7918-4214-2 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME


Setup planning for machining a part is to determine the number and sequence of setups (including machining features grouping in setups) and the part orientation of each setup. Tool accessibility plays a key role in this process. An adaptive setup planning approach for different types of multi-axis machine tools is proposed in this paper by investigating Tool Access Directions (TADs) of machining features, Tool Orientation Spaces (TOSs) of machine tools, and Primary Locating Directions (PLDs) of workpieces. In our approach, feasible TADs of a machining feature are predefined based on feature geometry and best practice knowledge, and denoted by unit vectors; The TOS of a machine tool is generated according to its configuration through kinematic analysis, and represented by a unit spherical surface patch; Primary locating directions and their priorities of a workpiece are determined based on the surface areas and the surface accuracy grades of non-machining surfaces. Starting from a 3-axis based machining feature grouping, setups for a 3-, 4- (or 3-axis with indexing table), or 5-axis machine can be achieved effectively by tool accessibility examination. A so-generated setup plan can provide not only the best coverage of machining features but the optimal orientation for each setup. Prismatic parts are considered in the proof-of-concept phase. Algorithms introduced here are implemented in MATLAB, and a case study is used to show the results.

Copyright © 2005 by ASME



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