Study On CBR Theory, Method And Applications In Stamping Die CAD

Nowadays, technology and economy are developing at very fast speed. With the rapid development of computer, long-distance communication, electron and motor industry, etc., those consumers require the products updating with each passing day, so the lifecycle of product is comparative short. However, technology experts of mould and die are lacking for the modernization of production. To solve the conflict, an intellective mould-designing tool that can relieve human intelligent labor should be developed.This paper deals with the development of intellective stamping die CAD system based on CBR. Considering that there are many similar die families in product database of mould, the technology of case-based reasoning has been introduced into the research on stamping die design. The principle of CBR and the method by which CBR applies in the domain of stamping die design are researched systematically in the all-round way. By studying the technologies such as feature modeling, analytical hierarchy process, object-oriented integrated information expression, etc., the intelligence on stamping die CAD system is discussed and developed.The system mainly includes five modules. Part design module designs shape, dimension and precision, etc. for the machine parts; Assemblage module identifies the character, designs assemble process and completes the assembly drawing; Database and configuration management module saves the standard parts and die standard structure, and stores the completed design works; Project drawing mndule generates the two-dimensional drawing automatically and creates the list and section lines; Retrieving and reusing cases module, viz. reasoning based on existed product cases, help designers reuse the existed design directly or partially in new design.This system has been nearly finished and are evaluating and testing by customer users. The operating results show that the predefined functions and performance had been achieved.