Study of vibration-assisted micro-EDM - The effect of vibration on machining time and stability of discharge
Study of vibration-assisted micro-EDM - The effect of vibration on machining time and stability of discharge
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DOI：
10.1016/j.precisioneng.2007.09.003
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发表时间：
2008-10-01
影响因子：
3.6
通讯作者：
Mitsui, Kimiyuki
中科院分区：
文献类型：
--
作者：
Endo, Takashi;Tsujimoto, Takayuki;Mitsui, Kimiyuki
在微细电火花加工中，由于对碎屑的不适当冲洗，工具电极和工件之间的频繁粘附阻碍了加工的继续。因此，即使在可以进行加工的情况下，也需要长时间进行加工。为了解决这个问题，我们引入了振动辅助加工的微细电火花加工使用PZT在试图冲洗出之间的差距的工具电极和工件的碎片。结果表明，振动辅助提高了加工的稳定性，并在加工时间的极大减少的结果。在这项研究中，我们描述了振动辅助微细电火花加工时间的振幅和频率范围的影响。我们接下来展示加工中机床工作台的放电电流和位移的结果，以证明加工不稳定性来自工具电极和工件之间的粘附。此外，我们还表明了工件的刚度和粘附现象之间的密切关系。为了验证我们的实验结果，一个小方轴振动辅助微细电火花加工成功。(C)2007爱思唯尔公司All rights reserved.
In micro-EDM (electric discharge machining), due to the improper flushing out of the debris, frequent adhesion between a tool electrode and a workpiece prevents the continuation of the machining. Thus, a long time is required for machining, even when the machining is possible. In order to solve this problem, we introduced vibration-assisted machining to micro-EDM using PZT in an attempt to flush out debris from the gap between a tool electrode and workpiece. The results indicate that vibration assistance improves the machining stability and results in an extreme reduction of the machining time. In this study, we describe the effects of vibration-assisted micro-EDM on machining time for a range of amplitudes and frequencies. We next show the results of the discharge current and displacement of the machine table in machining, in order to prove that the machining instability comes from the adhesion between a tool electrode and a workpiece. In addition, we also showed a close relation between the stiffness of the workpiece and the adhesion phenomenon. To validate our experimental results, a small square shaft was successfully fabricated by vibration-assisted micro-EDM. (C) 2007 Elsevier Inc. All rights reserved.