Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Experimental Study on Characteristics of Dry Wire Electrical Discharge Machining (EDM) Process

건성 와이어방전가공 프로세스 특성에 관한 실험적 연구

  • Lee, Sang-Won (School of Mechanical Engineering, Sungkyunkwan Univ.) ;
  • Kim, Hong-Seok (Department of Mechanical Engineering, Seoul National Univ of Technology)
  • 이상원 (성균관대학교 기계공학부) ;
  • 김홍석 (서울산업대학교 기계공학과)
  • Published : 2010.01.01
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Abstract

This study investigates the non-traditional manufacturing process of dry wire electrical discharge machining (EDM) in which liquid dielectric is replaced by a gaseous medium. Wire EDM experiments of thin workpieces were conducted both in wet and dry EDM conditions to examine the effects of spark cycle (T), spark on-time ($T_{on}$), thickness of work pieces, and work material on machining performance. The material removal rate (MRR) in the dry wire EDM case was much lower than that in the wet wire EDM case. In addition, the thickness of workpiece and work-material were found to be critical factors influencing the MRR for dry EDM process. The relative ratios of spark, arc and short circuit were also calculated and compared to examine the effectiveness of processes of dry and wet wire EDM.

Keywords

References

  1. Kunieda, M. and Yoshida, M., "Electrical Discharge Machining in Gas," Annals of the CIRP, Vol. 46, No. 1, pp. 143-146, 1997. https://doi.org/10.1016/S0007-8506(07)60794-X
  2. Kunieda, M., Adachi, Y. and Yoshida, M., "Study on Process Reaction Force Generated by Discharge in EDM," Proc. MMSS'2000, pp. 313-324, 2000.
  3. Kunieda, M. and Furudate, C., "High Precision Finish Cutting by Dry WEDM," Annals of the CIRP, Vol. 50, No. 1, pp. 121-124, 2001. https://doi.org/10.1016/S0007-8506(07)62085-X
  4. Kunieda, M., Miyoshi, Y., Takaya, T., Nakajima, N., Zhanbo, Y. and Yoshida, M., "High Speed 3D Milling by Dry EDM," Annals of the CIRP, Vol. 52, No. 1, pp. 147-150, 2003. https://doi.org/10.1016/S0007-8506(07)60552-6
  5. Kao, C. C., Tao, J. and Shih, A. J., "Near dry electrical discharge machining," International Journal of Machine Tools & Manufacture, Vol. 47, No. 15, pp. 2273-2281, 2007. https://doi.org/10.1016/j.ijmachtools.2007.06.001
  6. Tao, J., Shih, A. J. and Ni, J., "Experimental Study of the Dry and Near-Dry Electrical Discharge Milling Processes," Transactions of the ASME Journal of Manufacturing Science and Engineering, Vol. 130, No. 1, Paper No. 011002, 2008.
  7. Miller, S. F., Shih, A. J. and Qu, J., "Investigation of the spark cycle on material removal rate in wire electrical discharge machining of advanced materials," International Journal of Machine Tools & Manufacture, Vol. 44, No. 4, pp. 391-400, 2007.
  8. Dauw, D. F., Snoeys, R. and Dekeyser, W., "Advanced pulse discriminating system for EDM process analysis and control," Annals of the CIRP, Vol. 32, No. 2, pp. 541-549, 1983. https://doi.org/10.1016/S0007-8506(07)60181-4