Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Indirect Cutting Force Measurement and Cutting Force Regulation Using Spindle Motor Current

주축모터 전류를 통한 절삭력의 간접 측정 및 절삭력 추종제어

  • Kim, Gi D. ;
  • Kwon, Won T. ;
  • Chu, Chong N.
  • 김기대 (서울대학교 대학원 기계설계학과) ;
  • 권원태 (서울시립대학교 정밀기계공학과) ;
  • 주종남 (서울대학교 기계설계학과)
  • Published : 1997.10.01
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Abstract

Quasti-static cutting force variations in milling process are measured indirectly using spindle motor current. Quasi-static sensitivity of the spindle motor current is higher than that of the feed motor current. Magnitude of the spindle motor current is independent of cutting direction. The linear relationship between the cutting force and the spimdle motor RMS current at various spindle rotational speed is obtained. Frequency/ Voltage(F/V) converter voltage is measured to identify the spindle speed and to determine the cutting force at various spindle speeds. Overload on the tool during milling process can be detected using the proposed indirect cutting force measurement. Based on these measurements, cutting force is regulated at a constant level by feedrate control.

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