Exact Polyhedral Machining

  • Cha-Soo Jun
  • Dong-Soo Kim
  • Sehyung Park
Chapter
Part of the IFIP — The International Federation for Information Processing book series (IFIPAICT, volume 18)

Abstract

Presented in this paper is a new approach to three-axis NC tool path generation for sculptured surfaces. In the proposed curve-based approach, the gouge-free tool paths are generated from a polyhedral model of STL form. The polyhedral model is offset using local-offsetting scheme. Then, the offset elements such as triangular facets, trimmed cylinders, and trimmed spheres are sliced by a series of drive planes. The curve segments on a drive plane are sorted, trimmed and linked, while the concave gouge is removed during the trimming process. The method is implemented on a PC, and some illustrative examples are provided in this paper. The main advantage of the proposed method is that a polyhedral model can be machined without any concave and convex gouge, especially on a NC machine supporting NURBS interpolation.

Key words

Polyhedral model Topological information NC tool path Gouge 
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References

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Copyright information

© IFIP International Federation for Information Processing 1999

Authors and Affiliations

  • Cha-Soo Jun
    • 1
  • Dong-Soo Kim
    • 1
  • Sehyung Park
    • 2
  1. 1.Dept. of IE and RECAPTGyeongsang National UniversitySouth Korea
  2. 2.Korea Institute of Science and TechnologySouth Korea

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