The effect of high frequency and duty cycle in electrochemical microdrilling
The effect of high frequency and duty cycle in electrochemical microdrilling
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DOI：
10.1007/s00170-010-3123-3
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发表时间：
2011-08-01
影响因子：
3.4
通讯作者：
Ciampi, J.
中科院分区：
文献类型：
--
作者：
Mithu, M. A. H.;Fantoni, G.;Ciampi, J.
脉冲电化学微加工具有有吸引力的功能相比，传统的电化学加工工艺的基础上，一个连续的电流，因为它允许瞬时电化学反应，通过施加超短电压脉冲。本文主要研究了在镍板电化学微孔加工中，施加频率和占空比对微孔加工的影响。在微工具制造过程中，电化学蚀刻钨微轴，使两个所需的不同长度和直径的圆柱形微工具，研究脉冲频率和占空比对电化学微加工的影响。所制造的微孔的形状和尺寸，加工时间，实际材料去除率（MRR（act））和短路的数量被认为是响应因素。测量微钻孔的宽度并与工具几何形状进行比较。对于短和长的微工具，MRR（act）和加工时间分别减少和增加所施加的频率。但MRR（act）和加工时间分别增加和减少占空比的增加。实验数据表明，在微钻孔过程中，所加工的微孔的形状和尺寸与所施加的频率和占空比之间存在很强的相关性。然而，发现短工具的MRR（act）比长工具高得多。
Pulse electrochemical micromachining possesses attractive features compared to conventional electrochemical machining processes based on a continuous current because it allows instantaneous electrochemical reaction by applying ultrashort voltage pulses. This study focuses on effects of applied frequency and duty cycle in electrochemical microdrilling on nickel plate. During microtool fabrication, tungsten micro-shafts are electrochemically etched to make two desired cylindrical microtools of different lengths and diameters to investigate the effects of pulsed frequency and duty cycle on electrochemical micromachining. The shape and size of the fabricated microholes, machining time, actual material removal rate (MRR(act)) and the number of short circuits are considered as response factors. Shapes of micro-drilled holes are measured and compared to tool geometry. As for both short and long microtools, MRR(act) and machining time respectively decreased and increased with an increase in applied frequency. But the MRR(act) and machining time respectively increased and decreases with an increase in duty cycles. Experimental data reveals that there is a strong correlation among the shape and size of the microhole fabricated with applied frequency and duty cycle during microdrilling. However, MRR(act) was found to be much higher for short tool than a long tool.