Improvement of Micro-hole EDM Efficiency using Vibration Flushing

진동기구를 이용한 미세구멍 방전가공의 효율향상

  • 손성민 (울산과학대학 기계학부)
  • Received : 2010.11.19
  • Accepted : 2011.02.10
  • Published : 2011.02.28


Micro EDM(Electric Discharge Machining) is one of the most powerful technologies which are capable of fabricating micro-structure without any problems from high cutting force. However, there is a significant defect in the part machining with deep holes or pockets, because debris which are generated by electric discharging may frequently cause a short circuit between an electrode and workpiece material. Vibration flushing can reduce the undesirable phenomena with dynamic flow of EDM fluid in a deep and choked area. In this study, Vibration flushing with solenoid is suggested and the results show that the method can generate a remarkable EDM efficiency with high amplitude at a low frequency in comparison with current vibration flushing methods with high frequency using piezo actuators.


Micro EDM;Vibration flushing;Material removal rate


  1. 김세환, 최계광, "와이어 컷 방전 가공한 펀치와 다이플레이트 제작에서의 수명연장에 관한 연구," 한국산학기술학회논문지, v.7, no.4, pp.545-549, 8월, 2006.
  2. 김세환, 최계광, "와이어 컷 방전가공후의 가공면 조도관찰," 한국산학기술학회논문지, v.3, no.2, pp.69-73, 6월, 2002.
  3. C.S. Gao, Z.X. Liu, "A study of ultrasonically aided micro-electrical discharge machining by the application of workpiece vibration," Journal of Materials Processing Technology, 139 (2003) 226-228.
  4. 서동우, 박민수, 이상민, 주종남, "방전가공을 이용한 미세구멍 가공 시 절연액, 축전용량과 초음파 부가에 따른 가공특성", 한국정밀공학회지, 제24권, 제12호, 42-49, 2007.
  5. Takashi Endo, Takayuki Tsujimoto, Kimiyuki Mitsui, "Study of vibration-assisted micro-EDM - The effect of vibration on machining time and stability of discharge", Precision Engineering, Vol 32, 269-277, 2008.
  6. Hao Tong, Yong Li, Yang Wang, "Experimental research on vibration assisted EDM of micro-structure with non-circular cross-section", Journal of Materials Processing Technology, Vol 208, 289-298, 2008.
  7. Urick, Robert J., Principle of underwater sound, McGraw-Hill, 1983.