The integration of CAD and CAM is critical for computer aided process planning. Recently, STEP has been emerged and utilized as a product data exchange standard format in CAD/CAM areas. The purpose of this study is to develop an efficient algorithm for extracting assembly information from STEP files. The assembly information consists of assembly component relations, assembly features, information codes for STEP(AICS) and the results from this study can be a reasonable link between design and manufacturing and a critical process that for CAAAP(Computer- Aided Assembly Process Planning)

Key Words : STEP, assembly information, assembly process planning