Introduce how to set up model for punching side frames of Santana 2000 with computer aided moulding technology by using CATIA-CADAM software as platform.

It is quite urgent for welding enterprises to set up the system of computer aided process planning (welding CAPP) because of the complexity, multi-factors and experience in welding process.

This paper has set up a computer aided diagnostic expert system for automotive drive line by way of forward and backward combined reasoning and depth optimal theory.