A Study on CAD interfaced CAPP System for Turning Operation ( I ) : Automatic Feature Recognition and Process Selection

선삭공정에서 CAD 인터페이스된 자동공정계획시스템개발에 관한 연구( I ) : 형상특징의 자동인식과 공정선정

This paper deals with some critical activities of CAPP system such as generation of part description database, part feature recognition, process and operation selection, and sequencing method for turning operation of symmetric rotational parts. The part description database is generated by data conversion module from CAD data, and the part feature is recognized by using both pattern primitives and feature recognition rules. Machining processes and operations are selected based on machining surface features and its sequence is determined by rules acquired from process planning expert. AutoCAD is employed as CAD system and computer program is developed by using Turbo-C on IBM PC/AT compatible system.