采用块状工具电极的精密电火花磨削加工法是低刚度轴和微细轴类零件电火花加工的主要方法之一 ,该方法过去采用的是径向进给方式。由于电极损耗的因素 ,使得工件的形状和尺寸的一致性不好 ,且对生产率也有影响。本文采用一种新的块状工具电极的进给方式———切向进给方式 ,利用伺服进给自动补偿电极损耗 ,大大地提高了成批加工工件的一致性和生产率。 Precision electric spark grinding method using block tool electrode is one of the main methods of EDM for low-rigidity shaft and micro-shaft parts. In the past, this method used radial feeding method. Due to the electrode loss factor, the consistency of the shape and size of the workpiece is not good, and the productivity is also affected. In this paper, a new feed method of the block tool electrode --- tangential feed mode, the use of servo feed to automatically compensate for electrode wear and greatly improve the consistency and productivity of the batch processing of the workpiece.