STUDY OF OBJECT-ORIENTED CAD SYSTEM BASED ON GROUP TECHNOLOGY

This paper introduces the techniques of using compound spare part method of GT to construct virtual part for realizing the design of die family in an object-oriented CAD system，taking the material stripping plate for example．The construction method and parameterization of virtual part，data storage and mechanism of event driven are analysed in detail．The integration of graphic and nongraphic data is achieved by using classes of graphics，database and information management．