| This paper researches on cooperative design of machine product based on Pro/ENGINEER 3D-CAD platform. It probes into implement method of every interrelated techniques in cooperative design and brings for corresponding implement scheme or technique frame to resolve many pivotal problems, which needs to be hand led in distributed design. First] y the paper brings forward a cooperat i ve work mode and designs the software system framework of CoopCAD(Pro/E), which is mainly based on the distributed work mode and assisted by centralized imde. At the same time, it puts forward a concurrent operation control strategy based on the state of cooperative design for the cooperative design mode of the system, which schedules and controls concurrent operation in cooperative design. Secondly it discusses the interrelated event trigger, which feels the change of cooperative design state and the feature data analyzer that analyses or recovers the information in each feature. The trigger and the analyzer carry out graphic sharing and cooperative awareness among all the workstations in system and optimized the data structure of feature information to promote the performance of the cooperative design network and ensure the cooperative design system work in real-time model. Thirdly the paper sets forth the structure of network management in CoopCAD(Pro/E), which contains several child management module for different information transmitting in network, based on the diversity and complexity of the information flows in the network of cooperative design system. This network management module sets up several virtual channels for cooperative work to control the information flowing in cooperative network efficiently. At last, it brings forward a method of conflict detection in geometry level and a strategy of confl icf decision, in which the design leading maximum conflicts should be eliminated, for resolving of the problem to detect and clear up the conflicts. The method and the strategy solve the problem about conflict in basic cooperative design mode. |
