CAD/CAM integration based on STEP standard

STEP standard affords a method for data representation and exchange in the whole production life. This paper presented an integration CAD/CAM system JWCAD/CAM based on STEP standard. The system realizes the production data exchange and shares with STEP by adopting a unified production information model. CAD system created part feature model according to application protocol (AP), output to STEP file; CAPP postprocess the STEP file according to AP, pick up part information and establish process plans; cast CAD/Fixture CAD accomplishes the design of block and fixtures; CAD generates NC code and translates it to machining process simulator; machining process simulator checks the validity of the NC program to confirm the probable collision between cutter, fixtures and, machine tools.