转向节铣端面钻中心孔复合机床设计

Design of the compound machine tool of end surface milling and center bore drilling for steering knuckle

转向节包括轴颈和叉架两个部分,作为首道工序的铣端面钻中心孔通常经过二次装夹完成,对中精度差,影响后续工序的加工质量。为提高现有技术水平,设计了一种能依次实现铣端面和钻中心孔的卧式双面复合机床。机床利用工件在斜导轨上换位利于自动排屑,利用单独的轴向定位装置、初限位装置和自动对心装置等夹具结构保证定位夹紧精度,采用与机器人联接的电气控制系统实现加工全流程的高速高效自动化。整机结构设计合理,自动化程度高,操作方便,生产效率高,切屑、冷却液等自动排出,制备得到的产品质量高,可克服现有技术的诸多不足。

The structure of steering knuckle comprises of shaft and fork. As the first process,end surface milling and center bore drilling usually needs clamping twice,which leads poor precision and quality of subsequent processes. To solve the problem,a horizontal double- sided compound machine tool is designed to finish end surface milling and center hole drilling successively without twice clamping. The work piece moves along the inclined rail to achieve auto chip- removal. The fixtures of the independent axial location of device,limiting device and self- centering device are used to ensure the position and clamping precision. The electrical control system jointed with robots is employed to ensure high speed and efficiency automation throughout whole machining process. The machine tool is featured by reasonable structural design,high degree of automation,convenient operation,automatic discharge of chip and cooling liquid,high quality of products,which has overcome lots of technical problems of current machine tools.