Research on Virtual NC Technique in Turning and Milling Process

A virtual machining system based on virtual manufacturing technique and NC machining technique for turn-milling center is developed in this paper, which can realize all processes from the establishment of NC procedure to machining simulation. On the platform of visual C++, the virtual machining environment is built by OpenGL technique, and the structure of machining simulation system and its function are proposed. According to turn-milling center characteristic, the mathematical models about turning and milling are respectively built in virtual NC machining process. The geometric simulation and physical simulation are realized on the basis of the models by C++ language. The research demonstrates that the simulations are handled to complete the virtual machining of the product by checking machining ability, rationality of design, prediction manufacture circle, and promptly modifying design. The method offers the theoretical foundation and reference value of practical application for structure design of turn-milling centre.