TOWARDS STEP-BASED CAD/CAPP/CAM SYSTEMS

摘要

This paper presents an overview of standard representation and exchange of product data for communication between CAD/CAPP/CAM systems. This standard is known as ISO 10303- Product data representation and exchange, more commonly referred to as STEP, STandard for the Exchange of Product model data. It is also describes the necessary mechanisms to implement STEP in CAD/CAPP/CAM systems. The first part of the paper covers manufacturing features model, tolerances model, etc. All these models are represented using a data modeling language called EXPRESS that was developed specifically for STEP. The other part describes the implementation mechanisms of these models and their data exchange in CAD/CAPP/CAM systems. The research work presented in this paper contributes to the area of integrating CAD/CAPP/CAM systems.