关键词: 虚拟装配, 运动副, 自动识别, 装配约束

Abstract: In order to reduce the workload of pretreatment of mechanism motion simulation effectively after finishing assembly simulation and enhance the automatic level of mechanism motion simulation, the method of automatic recognition of kinematic pair oriented to motion simulation in virtual assembly environment was presented. The constraint degree of all the constraints between two components (subassembly or part) was calculated through abstracting the information of assembly constraints in virtual assembly environment, and the models of kinematic pairs in the mechanisms were mapped automatically by the constraint degree so as to provide the basic information for establishing models of mechanisms in mechanisms motion simulation. Combining with the prototype system Virtual Assembly Process Planning (VAPP),the infrastructure data modules, data structure of mechanism models, information transmission process and implementation steps for mechanisms motion simulation based on virtual assembly system were also proposed, the effectiveness of the method was validated by an example in the system.

Key words: virtual assembly, kinematic pair, automatic recognition, assembly constraint, constraint degree