Structural Characteristic Analysis of a High-precision Centerless Grinding Machine with a Concrete-filled Bed

  • Kim, Seok-Il (School of Aerospace and Mechanical Engineering, Hankuk Aviation University) ;
  • Cho, Jae-Wan (Graduate School, Hankuk Aviation University)
  • Published : 2006.10.01

Abstract

High-precision centerless grinding machines are emerging as a means of finishing the outer diameter grinding process required for ferrules, which are widely used as fiber optic connectors. In this study, a structural characteristic analysis and evaluation were carried out using a virtual prototype of a centerless grinding machine to realize systematic design technology and performance improvements required to manufacture ferrules. The prototype consisted of a concrete-filled bed, hydrostatic grinding wheel (GW) and regulating wheel (RW) spindle systems, a hydrostatic RW feed mechanism, a RW swivel mechanism, and on-machine GW and RW dressers. The loop stiffness values of the centerless grinding machine were estimated based on the relative displacements between the GW and RW caused by grinding forces. The simulated results illustrated that a concrete-filled bed considerably improved the structural stiffness and accuracy of a high-precision centerless grinding machine.

References

  1. Rowe, W. B., Spraggett, S., Gill, R. and Davies, B. J., 'Improvements in centreless grinding machine design,' Annals of the CIRP, Vol. 36, No. 1, pp. 207-210, 1987 https://doi.org/10.1016/S0007-8506(07)62587-6
  2. Rowe, W. B., Miyashita, M. and Koenig, W., 'Centerless grinding research and its application in advanced manufacturing technology,' Annals of the CIRP, Vol. 38, No. 2, pp. 617-626, 1989 https://doi.org/10.1016/S0007-8506(07)61129-9
  3. Takeuchi, Y., Mitachi, S. and Nagase, R., 'High-strength classceramic ferrule for SC-type single-mode optical fiber connector,' IEEE Photonics Technology Letters, Vol. 9, No. 11, pp. 1502-1504, 1997 https://doi.org/10.1109/68.634722
  4. Cho, S. J., Kim, H. G., Ebihara, T. and Tuskisima, H., 'The study on the development of ultra precision centerless grinder,' Journal of KSPE, Vol. 20, No. 6, pp. 11-14, 2003
  5. Lee, E. S., Cho, C. R. and Park, B. J., 'Development of rotary diamond dressing system of centerless grinder for ferrule grinding,' Journal of KSPE, Vol. 20, No. 6, pp. 15-19, 2003
  6. Park, C. H., Hwang, J. H. and Cho, S. J., 'A study on the feeding system of centerless grinder for machining the ferrule,' Proc. of KSPE, pp. 65-69, 2002
  7. Park, C. H., 'Design and performance evaluation on the motion elements of centerless grinder,' 3rd Mid-Evaluation Workshop of Intelligent Grinding System, 2004
  8. NSK, 'Precision Machinery Product,' NSK Catalog No. 3101, 1993
  9. THK, 'Linear Motion System,' THK Catalog No. 100-1K, 1991