International Journal of Precision Engineering and Manufacturing

Korean Society for Precision Engineering (한국정밀공학회)
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A New Approach Increasing the Rotational Accuracy of Ball- Bearing Spindle by Using Proper Bearing Positioning

  • Yegor. A. (Machine Tool Research Center(RRC), Changwon National University) ;
  • Lee, Choon-Man (School of Mechatronics, Changwon National University) ;
  • Chung, Won-Jee (School of Mechatronics, Changwon National University)
  • Published : 2003.09.01
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Abstract

In order to improve the quality of a spindle unit it is important to increase its rotational accuracy. The rotational accuracy of a spindle unit can be defined as the stability or immobility of its spindle axis while rotating. Spindle rotation in the rolling bearings causes the disturbing influence, which leads to the oscillation of a rotation axis. The purpose of this study is to investigate the oscillation sources and find a way to decrease the runout without additional expenses. The main source of oscillation is the interaction between rolling bodies and ring races. The first oscillation source was the out-of-shape imperfection of inner bearing ring. The mutual compensation of oscillation by proper rings orientation was proposed, which sometimes allow to decrease the radial runout of spindle rotation axis by approximate 40％ down. Also the outer ring harmonics were explored as the second oscillation source. The analysis shows the dependency between the number of rolling bodies and the outer ring race harmonics. The conclusion on the orientation of bearing cages and the bearing rings was made, which makes possible to obtain the optimal variant of their mounting in the spindle unit when the rotational accuracy of the spindle is maximal, and the spindle runout considerably less.

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References

  1. Bednyashin, A. E., 'Different Methods of Spindle Rotation Accuracy Increasing,' STIN, Vol. 4, pp. 14-16, 2001
  2. GOST 3395-75, Rolling Bearings (General Classification), USSR Government Standard, 1975
  3. Juravlev, V. F. and Balmont, V. B., 'Mechanics of Ball Bearings of Gyroscopes,' Mashinostroenie, Moscow, pp. 122-140, 1985
  4. Levina, Z. M., Gorelik, I. G., Zverev, I. A. and Segida, P., 'Computer Analysis of Elastic-Deformation, Dynamic, and Temperature Characteristics of Spindle Units at Designing,' Proceedings of Moscow Research Institute of Machine Tools, pp. 3-89, 1989
  5. Peters, J. and Vanherck, P., 'An Axis of Rotaticn Analyzer,' Proceedings of the Fourteenth International Machine Tool Design and Research (MTDR) Conference, Manchester, 1973
  6. Pozdnyak, E. I., 'Estimation of Vibration Caused by Rolling Bearing's Imperfections,' Journal of Machinery Manufacture and Reliability (Russian Academy of Sciences), Vol. 5, 1976
  7. Reshetov, D. N. and Portman, W. N., 'Precision of Machine Tools,' Mashinostroenie, Moscow, p. 64, 1986
  8. Tamura, A. and Shimizu, H., 'Vibration of a Rotor based on Ball Bearings,' Transactions of the ASME, Journal of Manufacturing Science and Engineering, Vol. 41, pp. 763-775, 1967
  9. Venkatraman, V., 'Analysis of Spindle Running Accuracy,' Journal of Machine and Production Engineering, Vol. 12, pp. 146-150, 1975
  10. Weck, M., Handbook of Machine Tools, Vol. 4, pp. 32-33, 1995
  11. Zverev, I. A., Eun, I. U., Chung, W. J. and Lee, C. M. 'Simulation of Accuracy of Rotation of High-Speed Spindle Units,' International Journal of Advanced Manufacturing Technologies, under revision, 2001
  12. Zverev, I. A. and Push, A. V., 'Spindle Units: Quality and Reliability at Designing,' Moscow State Technology Univ. Press, Moscow, pp. 10-12, 2000