A Study on the Performance Evaluation of a Voice Coil Actuator for Electro-Discharge Micro-Drilling Machine

보이스코일 액츄에이터로 이송되는 미세구멍 가공용 방전 가공기의 작동특성 연구

  • 양승진 (강원대학교 기계·메카트로닉스공학부 대학원) ;
  • 백형창 (홍천직업훈련원 치공구설계과) ;
  • 김병희 (강원대학교 기계·메카트로닉스공학부) ;
  • 장인배 (강원대학교 기계·메카트로닉스공학부)
  • Published : 2001.12.01

Abstract

In this paper, we have developed an electro discharge machine for micro drilling driven by a voice coil actuator. Because the voltage signal of the electro-discharging circuit shows a lot of peaks and valleys, the active type low-pass filtering technique is adopted to get the average of the signal. Since the motion of the voice coil is precisely controlled by the error value between the object voltage value and the measured one, it is possible to prevent the mechanical contact between the rotating electrode and the workpiece and to maintain the appropriate machining conditions during the process. The electro-chemical machining technology was also adopted to make small diameter electrodes. Pure water is used as a dielectric. The machining procedure is performed to verify the feasibility of the developed system. It takes about 10 seconds to drill the ${\phi}m$100${\mu}m$ hole to the 100${\mu}m$ thickness stainless steel plate. The machining time depends on the values of the resister and the capacitor. There may exist the optimal values of time constant and the tendency is displayed In the appendix.

Keywords

References

  1. 김규만, 최덕기, 주종남, '미세축 구멍 가공을 위한 미세방전가공기의 개발', 한국정밀공학회지, 제15권 제12호, pp.55-61, 1998
  2. 김규만, 김보현, 주종남, '미세구멍의 미세 방전가공에서 가공율과 전극소모 특성', 한국정밀공학회지, 제16권 제10호, pp.94-100, 1999
  3. 윤재웅, 양민양, '미세구멍의 방전가공에 관한 연구', 대한기계학회논문집, 제14권 제5호, pp.1147-1154, 1990
  4. B. Sprenger, 'Planner high speed linear direct drive with submicron position', Paper for degree of Doctor of Technical Science, Swiss Federal Institute Technology ETH, Zurich, 1999
  5. 이준우, '보이스코일 액츄에이터를 기반으로한 고정밀 직선이송 시스템의 위치결정,' 강원대학교 석사학위논문, 2000
  6. Young-bong Bang, Toshiro Higuchi, 'Development of Micro Drilling Machine Using Voice Coil Motor', Journal Japan Soc. of Precision Engineering, 1998
  7. Young-bong Bang, Toshiro Higuchi, 'Drill Breakage Detection and Measurement of Distance to the Drilling Surface on the Micro Drilling Machine Using Voice Coil Motor', Journal Japan Soc.of Precision Engineering, 1999