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However, because of over-complexity,stamping CAPP system for automobile panels is moredifficult to implode effectively and practically. It shoulddeal with all knowledge from geometry, non-geometry,engineers’ experience, rules and criterions and successfulcases of planning process-paths for automobile panels. Theprocess plans should instruct or guide how to perform acomplex procedure.Based on KBE, new frameworks have been presented asan intelligent master model in the system level and as aprocedure model in the activity level. This master modelbrings forward a new concept and notion that knowledge,and thus KBE, is the kernel object of technology forspecific domains in the manufacturing industry. In ac-cordance with these frameworks, an intelligent CAPPsystem has been specifically developed. Based on featuretechnology, features have been extracted and representedby the object-oriented method. Stamping features and theirparameters have been defined and extracted based onfeature technology and stamping process rules. The wholeproduct knowledge has been represented by frames whichdirectly map to objects (or features) in the object-orientedsense. Relevant appropriate operations features have beenassigned to stamping features of products based on feature-operation criteria, and parameters of stamping features andtheir correlativity. This assignment is a decision-makingactivity using a set of rules with a decision-making tree andmodel-based reasoning methods.With knowledge betweenoperations, such as operations order constraint (do-after)and operations combination constraint, the process path hasbeen improved based on relevant intelligent reasoningmethods. Based on the relation (preferred-to) betweenprocesses and machines/dies, the structure of the die andmachine for each process can be performed, while theprocess route has been determined. In this stamping processplanning, the procedure and information have been con-trolled by the process control structure to be associative andintegrated.This study can be used as the basis for future studies toenhance the complicated system. Indisputably, much effortwill be required in advancing the establishment of thepracticality process planning function blocks and theirmutual interaction. Moreover, the conversion of thesearchitectures into a prototype CAPP system will be aconsiderable endeavor.Acknowledgments 源[自-751^`论/文'网·www.751com.cn
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