Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Dynamic Analysis of Spindle Supported by Multiple Bearings of Different Types

복합베어링으로 지지된 스핀들의 동적 해석

  • Tong, Van-Canh (Graduate School, Department of Mechatronics, Kumoh National Institute of Technology) ;
  • Bae, Gyu-Hyun (Graduate School, Department of Mechatronics, Kumoh National Institute of Technology) ;
  • Hong, Seong-Wook (Department of Mechatronics, Kumoh National Institute of Technology)
  • 통반칸 (금오공과대학교 기전공학과 대학원) ;
  • 배규현 (금오공과대학교 기전공학과 대학원) ;
  • 홍성욱 (금오공과대학교 기전공학과)
  • Received : 2014.12.09
  • Accepted : 2015.01.14
  • Published : 2015.02.01
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Abstract

This paper presents a dynamic modeling method for the indeterminate spindle-bearing system supported by multiple bearings of different types. A spindle-bearing system supported by ball and cylindrical roller bearings is considered. The de Mul's bearing model is extended for calculating ball and cylindrical roller bearing stiffness matrices with inclusion of centrifugal force and gyroscopic moment. The dependence between spindle shaft reaction forces and bearing stiffness is effectively resolved using an iterative approach. The spindle rotor dynamics is established with the Timoshenko beam theory based finite elements. The spindle reaction forces, bearings stiffness and spindle natural frequencies are obtained with taking into account spindle radial load, ball bearing axial preload and rotational speed effects. The developed method is verified by comparing the simulation results with those from a commercial program.

Keywords

References

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