| High speed Machining is an important advanced manufacture technology, which plays a notable role in increasing the product quality and producing efficiency of manufacture industry. In order to implement machining with high speed, high-class machining center is required at first and the spindle unit is the heart part of machining center. The stiffness performance is the main factor of affecting the working performance of spindle unit and working accuracy. The processing quality of machining center with high speed is dependent on the physical design of spindle unit and the stiffhess performance to a large extent. Therefore, the stiffness performance of spindle unit is deeply studied, which has an important significance of improving the working performance of machining center.In this paper, by means of virtual prototype to analyze the stiffness of machining center spindle which produced by The Qinghai No. 1 Machine Tool Plant, introduced the basic conception, the feature and studying situation of virtual prototype technology, a software platform to build the spindle unit of virtual prototype, geometric model of each part of the spindle unit is built. Given Virtual assembly for the spindle unit, built a virtual prototype model of the spindle unit, checked out the collision interference for the model and verified the rationality of the design scheme and virtual assembly; at the same time, the assembly sequence and path are programmed for virtual prototype model of the spindle unit in order to further test the rationality of the processing and structure design. Then the virtual prototype model of the spindle unit in Pro/E is changed as finite element model in ANASYS through the software interface between Pro/E and ANASYS, analyzed the stiffness of the spindle, find out the danger section, which proved that the design scheme for the spindle unit is rational. |
