Automatic 3D machining feature extraction from 3D CSG solid input

Der Baau Perng, Zen Chen, Rong-Kwei Li

Research output: Contribution to journalArticlepeer-review

93 Scopus citations


A method for automatically extracting the machining features from 3D CSG solid input is proposed. The method involves converting a part's CSG tree representation into its equivalent DSG tree representation and then identifying the types of machinable features from the DSG tree. A DSG tree is a special case of CSG tree in which all geometric operations are of 'difference' type. The method is proposed for recognizing prismatic part features and its outputs contain feature attributes and possible tooling entrance faces, etc. Computer simulation is provided to illustrate the proposed method.

Original languageEnglish
Pages (from-to)285-295
Number of pages11
JournalComputer-Aided Design
Issue number5
StatePublished - Jun 1990


  • CAD
  • CAM
  • CSG tree
  • machining feature extraction

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