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Torsional vibration analysis of lathe spindle system with unbalanced workpiece

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Abstract

For the purpose of analyzing the torsional vibration caused by the gravitational unbalance torque arisen in a spindle system when it is machining heavy work piece, a 10-DOF lumped parameter model was made for the machine tool spindle system with geared transmission. By using the elementary method and Runge-Kutta method in Matlab, the eigenvalue problem was solved and the pure torsional vibration responses were obtained and examined. The results show that the spindle system cannot operate in the desired constant rotating speed as far as the gravitational unbalance torque is engaged, so it may cause bad effect on machining accuracy. And the torsional vibration increases infinitely near the resonant frequencies, so the spindle system cannot operate normally during these spindle speed ranges.

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Authors and Affiliations

  1. School of Mechatronics, Changwon National University, Changwon, 641-773, Korea

    Rui Guo  (郭瑞), Sung-Hyun Jang & Young-Hyu Choi

Authors
  1. Rui Guo  (郭瑞)
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  2. Sung-Hyun Jang
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  3. Young-Hyu Choi
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Corresponding author

Correspondence to Young-Hyu Choi.

Additional information

Foundation item: Project(10033135-2009-11) supported by the Korean Ministry of Knowledge Economy (MKE) through HNK. Co, Ltd.

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Guo, R., Jang, SH. & Choi, YH. Torsional vibration analysis of lathe spindle system with unbalanced workpiece. J. Cent. South Univ. Technol. 18, 171–176 (2011). https://doi.org/10.1007/s11771-011-0676-8

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  • DOI: https://doi.org/10.1007/s11771-011-0676-8

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