| Traditional products design and development procedure generally contains sketch design, drawing design, physical prototype manufacture and prototype experiment. This procedure makes long period and costs highly, which can not meet the integrative needs of quality, efficiency and cost. But virtual prototype technology is a kind of completely new one, whose emergence and development brings an innovation to the traditional way of products design. By applying this technology, engineer can make various simulation and analysis on the built virtual digital model of the product, which could help them to find out the potential problems and mistakes of the product in the design period, and then they can amend the mistakes and improve the design sketch quickly. Therefore, applying virtual prototype technology in the process of product design could reduce its dependence on the physical one, which could reduce the development cost, cut the development cycle, improve the design quality and product performance and increase the competition capability of the enterprise.NC machine tool is important and infrastructural equipment for reconstructing traditional industry and building digital enterprise. As a mechanical and electrical product with complicated structure and high automation, its design has the rigorous requirements on kinematic capability, dynamic capability, mechanical structural capability and machining capability. To assure the design quality of NC machine tool, cut the design period and reduce the design cost effectively, virtual prototype technology should be introduced into the whole design procedure of this product. This paper studied the XK640 vertical NC milling machine, built its 3D virtual digital model. On the basis of this model it also built the motion simulation model, finite element model and machining simulation model, which could be use to evaluate kinematic & dynamic capability, structure capability and machining capability roundly after completing thesimulation analysis. It also provided the design with quality assuranceand the milling machine improvement with reliable warrant. Simultaneously, in the process of building the NC machine tool virtual prototype and simulation, this paper fully considered the manufacture factors and customer' s different needs, which could make sure that the milling machine could be manufactured and with more humanity. With the survey on the spot, it is proved that the application of virtual prototype technology on the design of XK640 NC milling machine is very successful, it not only decreased the design cost greatly, cut the design period enormously when guaranteeing the ultimate quality of the milling machine, but also make the product come into the market as possible as quickly, which brought huge economy benefits to the enterprise.By applying virtual prototype technology, this paper realized the modeling and simulation of the NC milling machine. This method is not only suitable for the design and development of milling machine, but also for the other machine tool products. And it also can be extended to research, design and develop other mechanical system with complicated structure. So the research method and the consequence in this paper have the significant practical value. |