Korean Journal of Computational Design and Engineering (한국CDE학회논문집)

Society for Computational Design and Engineering (한국CDE학회)
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Passage Feature Recognition Algorithm for Automatic Parting Surface Generation in Plastic Injection Mold

플라스틱 사출 금형의 분할면 자동 생성을 위한 관통 특징 형상 추출 알고리즘의 개발

  • 정강훈 (삼성 SDI M/E 사업팀) ;
  • 이건우 (서울대학교 정밀기계설계공동연구소)
  • Published : 2000.06.01
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Abstract

This paper proposes a topology-based algorithm for recognizing the passage features using a concept of multi-face hole loop. The Multi-face hole loop is a concetpual hole loop that is formed over several connected faces. A passage feature is recognized in the proposed approach by two multi-face hole loops that constitute its enterance and exit. The algorithm proposed in this paper checks the connectivity of the two multi-face hole loops to recognize passage features. The total number of passage features in a part is calculated from Euler equation and is compared with the number of found passage features to decide when to terminate. To find all multi-face hole loops in a part, this paper proposes an algorithm for finding all combinations of connected faces. The edge convexity is used to judge the validity of multi-face hole loops. By using the algorithm proposed in this paper, the passage features could be recognized effectively. The approach proposed in this paper is illustrated with several example parts.

Keywords

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