Transactions of the Korean Society of Machine Tool Engineers (한국공작기계학회논문집)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Thermal Characteristics of the High Frequency Motor Spindle according to the Bearing Preloads and Cooling Conditions

예압과 냉각조건에 따른 고주파 모터 내장형 주축계의 열특성

  • 최대봉 (한국기계연구원 초정밀기계팀) ;
  • 김수태 (창원대학교 대학원 기계공학과) ;
  • 정성훈 (창원대학교 대학원 기계공학과) ;
  • 김진한 (창원대학교 대학원 기계공학과) ;
  • 김용기 (㈜코스핀)
  • Published : 2005.12.01
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Abstract

Use of the high frequency motor spindles are increasing for the high speed machine tools recently. The important problem in the high speed spindles is to reduce and minimize the thermal effect by the motor and ball hearings. Thermal characteristics according to the bearing preload and spindle cooling are studied for the spindle with the oil mist lubrication and high frequency motor. Temperature distribution and thermal displacement according to the spindle speed, preload and flow rate are measured. Temperature distribution and thermal displacement of the high speed spindle system can be estimated reasonably by using the three dimensional model through the finite element method. The results of analysis are compared with the measured data. This study supports thermal optimization and find out more effective cooling condition. This paper show that the suitable preload and spindle cooling are very effective to minimize the thermal effect by the motor and ball bearings.

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References

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