Factor Influencing the Gas Film Performance of Electrochemical Discharge Machining
Electrochemical discharge machining (ECDM) is found to be a potential process for fabricate micorholes and microchannels in electrically nonconductive material. In the ECDM process, the gas film of electrode surface is used as the dielectric mediuM required for the spark discharge. Therefore the gas film quality is the dominant factor that determines the machining quality such as geometric accuracy, surface roughness arid repeatability. In this study, various parameters were induced to investigate the influence on the gas film quality and that which accounted by the produced current signal and machined contours. Experimental results showed that a stable and dense gas film could be obtained as the machining voltage exceeds critical voltage and reached a characteristic value, which is called transition voltage in this study. Under transition voltage(38 V in 6 M KOH), a stable electrochemical discharge current could be generated and resulted in a smallest deviation of contour dimension. Besides, the paper proposed that the change of current signal could serve as a standard of judgment. And this method could serve as an evidence for making subsequent improvement of process.
Electrochemical discharge machining (ECDM) Gas film Pyrez glass Transition voltage
Kun-Ling Wu Chih-Ping Cheng Chao-Chuang Mai Yu-Shan Hsu Biing-Hwa Yan
Department of Mechanical Engineering, Tungnan University, No. 152, Sec.3, Peishen Rd, Taipei 22202, Mechanical and Systems Research Laboratories, Industrial Technology Research Institute, No. 195, Sec Department of Mechanical Engineering, Central University, No.300, Jhongda Rd. , Jhongli, Taoyuan 320
国际会议
The 16th International Symposium on Electromachining(第16届国际电加工会议)
上海
英文
477-482
2010-04-19（万方平台首次上网日期，不代表论文的发表时间）