Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지

A Study on the Real-time Micro Control of WEDM Process for the Improvement of Discharging Stability

WEDM 프로세스의 방전 안정성 향상을 위한 실시간 미세제어에 관한 연구

  • 권신 (한국과학기술원 기계공학과) ;
  • 남성호 (생산기술연구원 나노가공팀) ;
  • 양민양 (한국과학기술원 기계공학과)
  • Published : 2005.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

Some studies have shown that unstable factors are inherent in WEDM process, causing the instability of the discharging pulse to reach about 40∼60％ in normal machining. Transient stability is an important subject in WEDM process since there is a close relationship between stability and machining performance, such as the characteristics of a machined surface, machining speed and problem of instability like wire rupture phenomenon. Among the many machining parameters affecting WEDM machining state, three specific parameters (Vr, Ip, off time ) are major controllable variables that can be applied in transient stability control. And, this research investigates the implementation and analysis of real-time micro control of the discharging stability of WEDM (Wire Electric Discharge Machining) process.

Keywords

References

  1. Ho, K. H., Newman, S. T., Rahimifard, S. and Allen, R. D., 'State of the Art in Wire Electrical Discharge Machining (WEDM),' Int. J. of Machine Tools & Manufacture, Vol. 44, pp. 1247 - 1259, 2004 https://doi.org/10.1016/j.ijmachtools.2004.04.017
  2. Kwon, S. and Yang, M. Y., 'Benefits of Using Instantaneous Energy to Monitor the Transient State of the Wire EDM Process,' Int. J. of Advanced Manufacturing Technology, In print, 2004
  3. Kinoshita, N., 'Control of Wire-EDM Preventing Electrode from Breaking,' Annals of the CIRP, Vol. 31, No. 1, pp. 111 - 114, 1982 https://doi.org/10.1016/S0007-8506(07)63279-X
  4. Liao, Y. S. and Woo, J. C., 'Design of a Fuzzy Controller for the Adaptive Control of WEDM Process,' Int. J. of Machine Tools & Manufacture, Vol. 40, pp. 2293 - 2307, 2000 https://doi.org/10.1016/S0890-6955(00)00036-5
  5. Rajurkar, K. P. and Wang, W. M., 'On-Line Monitor and Control for Wire Breakage in WEDM,' Annals of the CIRP, Vol. 40, No. 1, pp. 219 - 222, 1991 https://doi.org/10.1016/S0007-8506(07)61972-6
  6. Chae, H. J. and Lee, S. Y., 'Vibration Characteristics and Tension of a Wire in WEDM,' Journal of the KSPE, Vol. 18, No. 11, pp. 86-92, 2001
  7. Seong, J. K., Kang, M. C. and Hwang, K. H., 'Characteristics of Machinability and Operating Condition in Wire-Cut EDM of Die Material,' Proceedings of the KSPE Conference, pp. 14-18, April 1996
  8. Cho, S. S. and Oh, J. H., 'Influence of Current Waveform on Anode Erosion in Wire Electric Discharge Machining,' Journal of the KSPE, Vol. 18, No. 7, pp. 127-133, 2001