一种球面零件法向跟踪磨削加工运动学模型

针对当前航空航天、高铁等工业领域对难加工材料球面零件的高效精密加工的需求，简要介绍球面零件的加工原理与方法，重点讨论分析传统球面零件磨削加工的三种方法及其优缺点。提出一种新的基于砂轮法向跟踪原理的球面磨削加工方法，改善球面零件精密加工的情况，充分利用多轴联动磨床的加工优势。根据几何运动分解处理划分为类外圆磨削和类平面点磨削，并从砂轮-工件几何接触长度、砂轮磨削路径等角度进行了几何学运动分析，为该方法的深入研究提供指导。 

Kinematic model of normal-trach grinding for spherical parts

According to current requirements of efficient and precision machining for spherical parts which are made with difficult-to-machine materials and used in aerospace,high-speed rail and other industrial fields,the machining principle and method for spherical parts are introduced briefly.Three traditional spherical grinding methods are analyzed for their advantages and disadvantages.Then a new spherical grinding method is proposed based on the principle of grinding wheel normal tracking to improve the efficient precision machining for spherical parts and take full advantage of multi-axis grinding machine.It is divided to cylindrical-like grinding and plane-like point grinding according to motion decomposition.In view of geometry contact length between grinding wheel and workpiece and grinding wheel cutting path,the geometry and kinematic model is analyzed,so as to provide guidance for further study.