A step towards the in-process monitoring for electrochemical microdrilling

The electrochemical micromachining appears to be a promising candidate as a future micromachining technique that utilizes high frequency pulses for micron- to nanoscale material dissolution. This article presents a step towards the in-process monitoring based on waveforms generated during electrochemical micromachining. An attempt has been taken to correlate between the waveforms generated during machining and experimental outcomes such as material removal rate, machining time, and the dimensions of the microholes fabricated on commercially available nickel plate with prefabricated tungsten microtools. An electrical function generator is used as a signal source and a digital storage oscilloscope is provided for observing the nature of electrical pulses used and recording the waveforms generated during machining. The waveforms are subgrouped depending on the parameters used and analyzed to correlate the waveform shape and the machining outcomes. The digital storage oscilloscope also facilitates for observing the short-circuit condition which may occur during microdrilling. These results show that the shape of the waveforms and their corresponding values are in good agreement with the material removal rate, machining time, and on the dimension of fabricated microholes. Therefore, the proposed monitoring technique can be employed as a predictive tool in electrochemical micromachining.

[1]  Shi Hyoung Ryu,et al.  Electro-chemical micro drilling using ultra short pulses , 2004 .

[2]  J. A. McGeough,et al.  Process monitoring of electrochemical micromachining , 1998 .

[3]  Gualtiero Fantoni,et al.  The effect of high frequency and duty cycle in electrochemical microdrilling , 2011 .

[4]  Chong Nam Chu,et al.  The Effects of Tool Electrode Size on Characteristics of Micro Electrochemical Machining , 2006 .

[5]  Matthias Kock,et al.  Electrochemical micromachining with ultrashort voltage pulses–a versatile method with lithographical precision , 2003 .

[6]  Joseph Wang,et al.  Analytical Electrochemistry: Wang/Analytical Electrochemistry, Third Edition , 2006 .

[7]  Shi Hyoung Ryu,et al.  Fabrication of WC micro-shaft by using electrochemical etching , 2006 .

[8]  Shi Hyoung Ryu,et al.  Micro fabrication by electrochemical process in citric acid electrolyte , 2009 .

[9]  H. Lim,et al.  Fabrication of cylindrical micropins with various diameters using DC current density control , 2003 .

[10]  C. R. Cho,et al.  A study of the characteristics for electrochemical micromachining with ultrashort voltage pulses , 2006 .

[11]  S Mitra,et al.  Electrochemical machining: new possibilities for micromachining , 2002 .

[12]  Seung-Yub Baek,et al.  Investigation of short pulse electrochemical machining for groove process on Ni-Ti shape memory alloy , 2010 .

[13]  Allen J. Bard,et al.  Electrochemical Methods: Fundamentals and Applications , 1980 .

[14]  B. Bhattacharyya,et al.  Influence of tool vibration on machining performance in electrochemical micro-machining of copper , 2007 .

[15]  John W. Sutherland,et al.  Air Quality in Manufacturing , 2007 .

[16]  Mitsuro Hattori,et al.  A study of three-dimensional shape machining with an ECμM system , 2006 .

[17]  L. Hourng,et al.  The analysis and investigation on the microelectrode fabrication by electrochemical machining , 2009 .

[18]  Kamlakar P Rajurkar,et al.  Improvement of edm performance with advanced monitoring and control systems , 1997 .

[19]  Kai Liu,et al.  Experimental investigation on monitoring interelectrode gap of ECM with six-axis force sensor , 2011 .

[20]  Deug Woo Lee,et al.  Pulse electrochemical polishing for microrecesses based on a coulostatic analysis , 2009 .

[21]  Feng-Tsai Weng.  A study of supersonic-aided electrolysis , 2005 .

[22]  B. Bhattacharyya,et al.  Advancement in electrochemical micro-machining , 2004 .