A Study on the Bending Process for Precision Pipe Forming

정밀 파이프 성형을 위한 벤딩 공정 개발에 관한 연구

  • 김현진 (창원대학교 기계설계공학과 대학원) ;
  • 이춘만 (창원대학교 기계설계공학과)
  • Published : 2007.06.01

Abstract

The arbitrarily-bended pipe is widely used in a heat exchanger system. Thus, the pipe bending process has important role in performance and productivity of heat exchanger system. The purpose of this study is to investigate the bending process for manufacturing of sound pipe. And, the spring-back effect and the variation of pipe thickness should be controlled effectively. The change of spring-back ratio and the thickness variation of pipe according to the change of bending radius, bending angle and pipe thickness are analyzed by FEM analysis. The analytic results are compared with the experimental data, accordingly the results show good agreement. The method of the analysis can be applied for manufacturing of precision bended pipe.

Keywords

References

  1. Hosford, W. F. and Caddell, R. M., 'Metal Forming,' Prentice-Hall, 1983
  2. Johnson, W. and Meller P. B., 'Engineering Plasticity,' Ellis Horwood, 1983
  3. AI-Qureshi, H. A., 'Elastic-plastic analysis of tube bending,' International Journal of Machine Tools & Manufacture, Vol. 39, pp. 87-104, 1999 https://doi.org/10.1016/S0890-6955(98)00012-1
  4. Yang, J. B., Jeon, B. H. and Oh, S. I., 'Tube Bending Analysis for Hydroforming Process,' Transactions of Materials Processing, Vol. 9, No. 3, pp. 249-256, 2000
  5. Kim, K. Y. and Yun, D. P., 'Deformation analysis of copper pipe for hair pin under the bending forming using the Mandrel,' Spring Annual Conference of the KSPE, pp. 1630-1633, 2003
  6. Kang, H. S., Kim, D. S., Hur, S. and Hong, S. I., 'A study about shape processing for the bend of the Copper-Tube that use Hair Pin Bending Machine,' Spring Annual Conference of the KSPE, pp. 1705-1708, 2003
  7. Paper for Korea Science and Engineering Foundation, 'A Study on the Development of Three Dimensional Bending Machine,' Hydrox Korea Co., Ltd., 2004
  8. Taylan, A., Oh, S. I. and Harold, L. G., 'Metal Forming,' American Society for Metals, 1983
  9. Jung, D. W., 'Total Lagrangian Finite Element Analysis of Lateral Buckling for Thin Beam Structures,' Journal of Ocean Engineering and Technology, Vol. 11, No.4, pp. 7-22, 1997
  10. Program Manual, 'MSC.Marc Volume A : Theory and User Information,' MSC.Software Corporation, 2003
  11. Korean Standards Association, 'Test pieces for tensile test for metallic materials,' Korean Standards Association, 1981
  12. Korean Standards Association, 'Method of tensile test for metallic materials,' Korean Standards Association, 2003
  13. Kim, Y. W., Kong, S. Y. and Nam, J. Y., 'Measurement of Springback Ratio Using Bend Rig,' Spring Annual Conference of the KSMTE, pp. 410-415, 2002