CuW70铜钨电极损耗试验研究
Experimental Investigation of CuW70 Copper-tungsten Electrode Wear

以用于金属结合剂砂轮电火花修整的CuW70铜钨电极为研究对象，通过正交实验研究一些放电参数对电极损耗速度的影响；通过加工不同个数的孔来探讨在加工过程中电极侧面和底部的电极损耗大小、电极底面和碳层厚度变化。结果表明：小的峰值电流和大的脉冲持续时间可降低电极损耗率；尽管电极表面的碳层很容易被擦除，但铜钨电极的电极损耗速度随着初始加工阶段电极底面碳层的增加而有所减小。
CuW70 electrodes applied for electrical discharge dressing of metal-bonded grinding wheel were adopted to study the effect of main electrical parameters on the electrode wear rate with orthogonal experiments. The wear at the edge and the bottom of electrode, the thickness and surface topography of the carbon layer were explored through the processing of different number of holes by optimized discharge parameters. Experimental results showed that large pulse duration and low current can reduce the electrode wear rate. Although carbon layer adhered to the bottom surface of electrode can be easily wiped out, wear rate of CuW70 electrode decreases with the increasing of the carbon layer on the bottom surface in the initial phase