【作者】 裴景玉； 许加利； 胡德金；

【Author】 Pei Jingyu,Xu Jiali,Hu Dejin

【机构】 上海交通大学机械与动力工程学院；

【摘要】 定长补偿加工方法是应用分层原理进行微细电火花加工的一种方法,该方法能较好解决微细电火花加工中电极损耗对精度的影响问题,但离精密补偿尚有一定的距离。通过仿真分析及实验加工的手段,确定了精确电极相对体积损耗比、底面与侧面放电间隙的不同,以及由电极损耗导致的工件形状复杂化是影响精密定长补偿的关键因素,并分别加以研究。给出了精密电极相对体积损耗比的测量计算方法;引入了底面间隙、侧面间隙、体积系数、面积系数等概念;对原有的定长补偿公式进行了修正;总结了一套精密定长补偿的工艺方法。更多还原

【Abstract】 The fix-length compensation method is a method to machining workpiece layer-by-layer.It can compensate the electrode wear in micro-EDM.However,this method cannot be applied to precision machining.Experiments and simulations proves that real relative volume wear ratio,the difference between bottom discharge gap and side discharge gap,and the complex shape of workpiece are the key factors.In this paper,the measurement method of the real relative volume wear ratio is given.The measurement method and calculation method of bottom discharge gap,side discharge gap,volume ratio,and surface ratio are introduced.The fix-length composition formula is modified.The process of fix-length composition in precision machining is concluded.更多还原