| Virtual assembly is the typical application of the virtual reality technology in industry, and the researching at virtual assembly technology by researchers at home and abroad have made staggered results and applied to product prod uction process in recent years, to bring more economic benefits to enterprise. This subject uses pneumatic clamping fixture for drilling machine for example, to study the development process of virtual assembly system. First of all, colle ct fixture drawings, technical requirements, and consult the machine fixture des ign manual, to analyze the overall structure, positioning principle,each function makes parts and geometric shape of the parts. Then select the suitable engin-eering modeling software to model for the parts of the fixture, the subject ch-ooses UG NX5.0. After the establishment of the parts model is completed, as-semble the parts in UG environment, and check whether there is space interfe-rence phenomenon between parts, and if there is interference phenomenon, can timely modify parts model during the assembly process. After the assembly model of fixture for drilling machine is finished, import the model to3dsMax to take material setup and rendering, then import the model to Virtools soft-ware to make virtual assembly system. Before the fabrication for virtual asse-mbly system, the first to design the assembly system flow-path and assembly process planning of the fixture. In virtual scene of Virtools development platf-orm, by adding light, moving model, make the display of the model scene be more clear and veritable, and use the powerful Building Blocks module, to fa-bricate the human-machine interaction of virtual assembly system. The virtual assembly system of Pneumatic clamping fixture for drilling machine can not only display dynamic demonstration of the parts in the assembly process, but also allow the operator real-time control the action of the parts by the mouse, and watch the assembly process in any point of view. By using this system, the operator can obtain more intuitive understanding of the structure, the reali-zation principle for drilling machine and assembling process of the components functions of pneumatic clamping fixture. |