Micro electrical discharge machining using high electric resistance electrodes
Micro electrical discharge machining using high electric resistance electrodes
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DOI：
10.1016/j.precisioneng.2016.10.003
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发表时间：
2017
影响因子：
3.6
通讯作者：
T. Koyano;Yuki Sugata;A. Hosokawa;T. Furumoto
中科院分区：
文献类型：
--
作者：
T. Koyano;Yuki Sugata;A. Hosokawa;T. Furumoto
在微细电火花加工中，由于单脉冲放电的材料去除量主要决定了微细电火花加工的最小可加工尺寸，因此降低单脉冲放电的材料去除量具有重要意义。在本研究中，为了减少单脉冲放电的材料去除，高电阻材料，如单晶硅用于电极。分析结果表明，随着电极电阻的增大，放电电流峰值减小，脉冲宽度增大。此外，放电能量随着电阻的增大而减小。硅被用作工具电极，并且硅工具电极的电阻率对在不锈钢工件上产生的放电坑的直径的影响被检查。实验结果表明，随着硅电极电阻率的增加，放电坑的直径减小。由于放电弧坑的直径可以减小到0.5 μm，因此获得了Rz为0.03 μm的改善的表面光洁度。
In micro electrical discharge machining (EDM), because the material removal per single pulse discharge mainly determines the minimum machinable size of a micro EDM, decreasing the material removal per single pulse discharge is important. In this study, in order to decrease the material removal per single pulse discharge, high electric resistance materials such as single-crystal silicon are used for electrodes. Analytical results show that when the electrode resistance increases, the peak value of the discharge current decreases, whereas the pulse duration increases. In addition, the discharge energy decreases when increasing the resistance. Silicon is used as a tool electrode, and the effect of resistivity of the silicon tool electrode on the diameter of discharge craters generated on the stainless steel workpiece is examined. Experimental results reveal that with increasing silicon electrode resistivity, the diameter of discharge craters decreases. Because the diameter of discharge craters can be decreased to 0.5 μm, improved finished surfaces ofRz0.03 μm are obtained.