Electrochemical discharge machining (ECDM) can be applied as a non-traditional processing technology for machining non-conductive materials such as glass and ceramics, based on the phenomena of evoked electrochemical discharges around the tool electrode. The material removal mechanism of ECDM is noticeably complex and difficult to experimentally characterize. In this paper, finite element models were proposed to predict the material removal in the ECDM discharge regime. First, the single-pulse discharge on a tapered electrode was modeled. It was found that about 30.5% of the discharge energy is transferred to the workpiece. The continuous discharge on a cylindrical electrode was thereafter modeled according to this phenomenon, in which the removal of a layer of the workpiece material starts from the projected contour of the edge of the electrode end and extends inward during the ECDM processing. The effective discharge ratio for material removal was calculated to be 10.1%. The drilling depths of holes at different applied voltages were predicted by the proposed finite element method. It was found that the predicted values were consistent with the experimental results.

基于工具电极周围诱发的电化学放电现象，电化学放电加工 (ECDM) 可用作加工玻璃和陶瓷等非导电材料的非传统加工技术。ECDM 的材料去除机制非常复杂且难以通过实验表征。在本文中，提出了有限元模型来预测 ECDM 放电状态下的材料去除。首先，对锥形电极上的单脉冲放电进行建模。发现大约 30.5% 的放电能量转移到工件上。此后根据这种现象模拟圆柱形电极上的连续放电，其中一层工件材料的去除从电极端边缘的投影轮廓开始，并在 ECDM 加工过程中向内延伸。材料去除的有效排放率计算为 10.1%。通过所提出的有限元方法预测了不同施加电压下的钻孔深度。发现预测值与实验结果一致。