Research on assembly constraint realization technology in virtual assembly

Assembly constraint is an important step in the virtual assembly. In order to solve the problem of the assembly constraint, the process of the realization of assembly constraint was illuminated, and the algorithm for computing the position and orientation information of the components was presented in virtual environment by taking example of the assembly constraint between two surfaces, which was commonly used in practical assembly process. Constraint reduction mapping table and the expression of the result were also given, and the algorithm of adjusting the component in constraint space was proposed. All of these could make it more practical and convenient to assemble the components in virtual environment. The method was implemented and validated in the prototype system Virtual Assembly Process Planning (VAPP).