Constraint Matching Algorithm for Generating Main Sequences of Process Plan in CAPP

Process decision is the key point to the development of CAPP system. We divided the process decision into three separate sub-tasks: Generation of feature machining chain; process operations sequencing; and process steps sequencing. Each sub-task focuses on resolving only a main problem and neglects other secondary factors. Further more, different strategy adaptive to each kind of sub-task is worked out individually, thus effectively reducing the scale of process sequencing and complexity of the sequencing algorithm. Key techniques of solution are implemented in a RJ-CAPP system.