Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지
DOI QR코드

DOI QR Code

Performance Evaluation of Hydrostatic Bearing Guided Rotary Table for Large Volume Multi-tasking Vertical Lathe

대형 복합수직선반 가공기용 유정압베어링 회전테이블 성능 실험 및 분석

  • 심종엽 (한국기계연구원 첨단생산장비연구본부 초정밀시스템연구실) ;
  • 오정석 (한국기계연구원 첨단생산장비연구본부 초정밀시스템연구실) ;
  • 박천홍 (한국기계연구원 첨단생산장비연구본부 초정밀시스템연구실) ;
  • 신흥철 ((주)기흥기계) ;
  • 박우상 ((주)기흥기계) ;
  • 김민재 ((주)기흥기계) ;
  • 김민수 ((주)기흥기계)
  • Received : 2014.04.14
  • Accepted : 2014.06.23
  • Published : 2014.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

The large volume multi-tasking vertical lathe was developed for machining the bearing parts for a wind power generator. Although the machined part is large in size high precision tolerances are required recently. One of the most important components to achieve this mission is the rotating table which holds and supports the part to be machined. The oil hydrostatic bearing is adopted for the thrust bearing and the rolling bearing for the radial bearing. In this article experimental performance evaluation and its analysis results are presented. The rotational accuracy of the table is assessed and the frequency domain analysis for the structural loop is performed. And in order to evaluate the structural characteristic of table the moment load experiment is performed. The rotational error motion is measured as below 10 ${\mu}m$ for the radial and axial direction and 22,800 Nm/arcsec of moment stiffness is achieved for the rotary table.

Keywords

References

  1. Benedetti, G., "Analysis of the Wind Turbine Components Market," Frost & Sullivan, 2011.
  2. IHS Emerging Energy Researcht, "Latin America Wind Power Markets and Strategies 2010-2025," 2010.
  3. Goch, G., Knapp, W., and Hartig, F., "Precision Engineering for Wind Energy Systems," CIRP Annals-Manufacturing Technology, Vol. 61, No. 2, pp. 611-634, 2012. https://doi.org/10.1016/j.cirp.2012.05.011
  4. ISO 230-7, "Test Code for Machine Tools - Part 7: Geometric Accuracy of Axes of Rotation," 2006.
  5. Choi, H. B., Lee, J. H., Park, W. S., Shin, H. C., Oh, J. S., et al., "Optimization of Multi-tasking Vertical Lathe for Windmill Parts," J. Korean Soc. Precis. Eng., Vol. 29, No. 2, pp. 147-155, 2012. https://doi.org/10.7736/KSPE.2012.29.2.147
  6. Marsh, E. and Grejda, R., "Air Bearing Spindle Instrumentation for Precision Grinding of Ceramics," Ceramic Transactions, Vol. 102, pp. 17-26, 2000.
  7. Marsh, E., Couey, J., and Vallance, R., "Roundness Measurement of Spherical Artifacts at Arbitrary Latitude," Precision Engineering, Vol. 30, No. 3, pp. 353-356, 2006. https://doi.org/10.1016/j.precisioneng.2005.11.003
  8. Kunzmann, H., Pfeifer, T., Schmitt, R., Schwenke, H., and Weckenmann, A., "Productive Metrology-adding Value to Manufacture," CIRP Annals-Manufacturing Technology, Vol. 54, No. 2, pp. 155-168, 2005.
  9. Hills, R. L., "Power from the Wind - A History of Windmill Technology," Cambridge University Press, pp. 1-6, 1996.
  10. Hau, E., "Wind Turbines: Fundamentals, Technologies, Applications, Economics," Springer, 2nd Ed., pp. 66-71, 2010.
  11. Estler, W., Edmundson, K., Peggs, G., and Parker, D., "Large-scale Metrology - An Update," CIRP Annals-Manufacturing Technology, Vol. 51, No. 2, pp. 587-609, 2002. https://doi.org/10.1016/S0007-8506(07)61702-8
  12. Evans, C. J., Hocken, R. J., and Estler, W. T., "Self-calibration: Reversal, Redundancy, Error Separation, and 'Absolute Testing'," CIRP Annals-Manufacturing Technology, Vol. 45, No. 2, pp. 617-634, 1996. https://doi.org/10.1016/S0007-8506(07)60515-0
  13. Schellekens, P., Rosielle, N., Vermeulen, H., Vermeulen, M., Wetzels, S., et al., "Design for Precision: Current Status and Trends," CIRP Annals-Manufacturing Technology, Vol. 47, No. 2, pp. 557-586, 1998. https://doi.org/10.1016/S0007-8506(07)63243-0
  14. Donaldson, R. R. and Patterson, S. R., "Design and Construction of a Large, Vertical Axis Diamond Turning Machine," Proc. of the SPIE on Techincal Symposium, Vol. 0433, pp. 62-67, 1983.
  15. Bendat, J. S. and Piersol, A. G., "Engineering Applictions of Correlation and Spectral Analysis," J. Wiley, 1st Ed., pp. 32-33, 1993.