Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지

Accuracy Simulation of Precision Rotary Motion Systems

회전운동 시스템의 정밀도 시뮬레이션 기술

  • Hwang, Joo-Ho (Department of Ultra Precision Machines and Systems, KIMM) ;
  • Shim, Jong-Youp (Department of Ultra Precision Machines and Systems, KIMM) ;
  • Hong, Seong-Wook (School of Mechanical Engineering, Kumoh National Institute of Technology) ;
  • Lee, Deug-Woo (Department of Nano Mechatronics, Pusan National University)
  • 황주호 (한국기계연구원 초정밀기계시스템연구실) ;
  • 심종엽 (한국기계연구원 초정밀기계시스템연구실) ;
  • 홍성욱 (금오공과대학교 기계공학부) ;
  • 이득우 (부산대학교 나노메카트로닉스공학과)
  • Received : 2011.02.02
  • Accepted : 2011.02.04
  • Published : 2011.03.01
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Abstract

The error motion of a machine tool spindle directly affects the surface errors of machined parts. The error motions of the spindle are not desired errors in the three linear direction motions and two rotating motions. Those are usually due to the imperfect of bearings, stiffness of spindle, assembly errors, external force or unbalance of rotors. The error motions of the spindle have been needed to be decreased to desired goal of spindle's performance. The level of error motion is needed to be estimated during the design and assembly process of the spindle. In this paper, the estimation method for the five degree of freedom (5 D.O.F) error motions of the spindle is suggested. To estimate the error motions of the spindle, waviness of shaft and bearings, external force model was used as input data. And, the estimation models are considering geometric relationship and force equilibrium of the five degree of the freedom. To calculate error motions of the spindle, not only imperfection of the shaft, bearings, such as rolling element bearing, hydrostatic bearing, and aerostatic bearing, but also driving elements such as worm, pulley, and direct driving motor systems, were considered.

Keywords

Acknowledgement

Grant : 기계장비 정밀도 시뮬레이션 플랫폼 기술개발

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