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Static and Dynamic Analysis and Optimization Design of 40,000-rpm High-Speed Spindle for Machine Tools

공작기계용 40,000rpm 고속주축의 정·동적 해석과 최적설계에 관한 연구

  • Kim, Dong Hyeon (Dept. of Mechanical Design & Manufacturing Engineering, Changwon Nat'l Univ.) ;
  • Lee, Choon Man (Dept. of Mechanical Design & Manufacturing Engineering, Changwon Nat'l Univ.) ;
  • Choi, Hyun Jin (Daegu Machinery Institute of Components & Materials)
  • 김동현 (창원대학교 기계설계공학과) ;
  • 이춘만 (창원대학교 기계설계공학과) ;
  • 최현진 (대구기계부품연구원)
  • Received : 2012.06.13
  • Accepted : 2012.08.29
  • Published : 2013.01.01

Abstract

The spindle is the main component in machine tools. The static and dynamic characteristics of the spindle directly affect the machining accuracy of workpieces. The characteristics of the spindle depend on the shaft size, bearing span, built-in motor location, and so on. Therefore, the appropriate selection of these parameters is important to improve the spindle characteristics. This paper presents the analysis of the static and dynamic characteristics and optimization design of a 40,000-rpm high-speed spindle. Statistical analysis for optimization and finite element analysis were performed. This study uses the response surface method to optimize the objective function and design factors. The targets are the natural frequency and displacement. The design factors are the shaft length, shaft diameter, bearing span, and motor location. The optimized design provides better results than the initial model, and these results are expected to improve the static and dynamic characteristics of the spindle.

Keywords

High Speed Spindle;Finite Element Analysis;Response Surface Method;Interactions Plot

Acknowledgement

Supported by : 한국연구재단

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