Electrostatic Actuating Bendable Flat Electrode for Micro Electrochemical Machining

Ruining Huang, Xiaokun Zhu
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引用次数: 1

Abstract

In micro-electrochemical machining (μECM), material dissolution takes place at very close vicinity of tool electrode due to localization of electric field. Controlling the gap between tool electrode and workpiece is the key to μECM. Therefore, a new method is proposed to solve a variety of problems in small gap control. In the present context, experiments were carried out with an indigenously developed setup to fabricate cylindrical arrays. During the machining process, the flat electrode bends due to electrostatic force in pulse on-time, which self-adaptively narrows the gap between the electrode and the workpiece. The workpiece material will be removed once the gap meets the processing condition. Therefore, this method has advantages of reducing dependence on high precision machine tools and of avoiding complex servo control. The flat electrode quickly restores to its original condition when it is in pulse off-time, making the gap much larger than that in traditional electrochemical machining (ECM). The large gap benefits debris removing, which improves the machining accuracy. The influence of different experimental parameters on accuracy and efficiency during the machining process has been investigated. It is observed that with the increase in applied voltage or concentration of electrolyte, the material removal rate and the process gap both increase. The detailed analysis of the experimental results is described in this paper.

微电化学加工用静电驱动可弯曲平板电极
在微电化学加工(μECM)中,由于电场的局部化,材料的溶解发生在离刀具电极很近的地方。控制刀具电极与工件之间的间隙是μECM加工的关键。因此,提出了一种新的方法来解决小间隙控制中的各种问题。在目前的情况下,实验进行了一个自主开发的装置,以制造圆柱阵列。在加工过程中,平面电极在脉冲导通时间受到静电力的作用而弯曲,自适应地缩小电极与工件之间的间隙。一旦间隙满足加工条件,工件材料将被去除。因此,该方法具有减少对高精度机床的依赖和避免复杂伺服控制的优点。平板电极在脉冲断时能迅速恢复到原来的状态,使得间隙比传统的电化学加工(ECM)要大得多。大间隙有利于清除碎屑,提高加工精度。研究了加工过程中不同实验参数对加工精度和效率的影响。观察到,随着外加电压或电解液浓度的增加,材料去除率和工艺间隙均增大。本文对实验结果进行了详细的分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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