Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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A Study for Preventing Folding Defect of the Common Rail Pipe in Heading Process

커먼레일 파이프 헤딩공정의 접힘결함 방지에 관한 연구

  • Song, Myung-Jun (Creative Engineering System, Pusan National Univ.) ;
  • Woo, Ta-Kwan (School of Mechanical Engineering, Pusan National Univ.) ;
  • Jung, Sung-Yuen (Research Institute of Mechanical Technology, Pusan National Univ.) ;
  • Hur, Kwan-Do (Department of Mechanical Engineering, Dongeui Univ.) ;
  • Kim, Chul (Research Institute of Mechanical Technology, Pusan National Univ.)
  • 송명준 (부산대학교 창의공학시스템) ;
  • 우타관 (부산대학교 기계공학부 대학원) ;
  • 정성윤 (부산대학교 기계기술연구원) ;
  • 허관도 (동의대학교 기계공학부) ;
  • 김철 (부산대학교 기계기술연구원)
  • Published : 2010.01.01
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Abstract

With the latest automobile technology, though the third generation common rail system requires high injection pressures up to 1,800bar, the next generation diesel engine is expected to require more higher pressures than the third generation. The common rail pipe requires higher strength because it is one of the parts in the common rail system, which is influenced directly by fuel under high pressure. Preform design is very important for preventing head of the common rail pipe from folding in the heading process. In this study, die angle, curvature, outer diameter of die and length of trapped part are selected as main parameters to obtain best preform shape minimizing radius of folding. Therefore optimal design is carried out by finite element analysis and Taguchi method through main parameters. Results of the finite element analysis have good agreements with those of the experiments in the actual field.

Keywords

References

  1. Flaig, U., Polach, W. and Ziegler, G., "Common rail system(CR-system) for passenger car DI diesel engines - Experiences with applications for series production projects," SAE, Paper No. 1999-01-0191, 1999.
  2. Wang, Z., Lu, J. and Wang, Z. R., "Numerical and experimental research of the cold upsetting-extruding of tube flanges," Journal of Material Processing Technology, Vol. 110, No. 1, pp. 28-35, 2001. https://doi.org/10.1016/S0924-0136(00)00863-3
  3. Hua, X. L. and Wang, Z. R., "Numerical simulation and experimental study on the multi-step upsetting of a thick and wide flange on the end of a pipe," Journal of Material Processing Technology, Vol. 151, No. 1-3, pp. 321-327, 2004. https://doi.org/10.1016/j.jmatprotec.2004.04.081
  4. Lin, S. Y. and Lin, F. C., "Prediction of fold defect in barreling formations of cylinder upsetting," Journal of Material Processing Technology, Vol. 39, No. 4, pp. 325-341, 2003.
  5. Balendra, R. and Qin, Y., "An approach for the forming of large-thickness-flange components by injection forging," Journal of Material Processing Technology, Vol. 145, No. 2, pp. 153-162, 2004. https://doi.org/10.1016/S0924-0136(03)00666-6
  6. ISO/NP 13296, "Diesel engines-High pressure fuel injection pipe assemblies-General requirements and dimensions," 2005.
  7. National Machinery Company, "Part Shape Development and Tool Design for Multi-die Cold Forming," Tiffin, p. 105, 1981.
  8. Poursina, M., Parvizian, J. and Antonio, C. A. C., "Optimum pre-form dies in two-stage forging," Journal of Material Processing Technology, Vol. 174, No. 1-3, pp. 325-333, 2006. https://doi.org/10.1016/j.jmatprotec.2006.01.015
  9. Gokler, M. I., Darendeliler, H. and Elmaskaya, N., "Analysis of tapered preforms in cold upsetting," International Journal of Machine Tools and Manufacture, Vol. 39, No. 1, pp. 1-16, 1999. https://doi.org/10.1016/S0890-6955(98)00021-2
  10. Park, J. H., Kim, S. G., Kang, J. H., Park, Y. C., Kim, S. H., Seo, S. R. and Park, K. H., "Preform Design for Manufacturing of Automobile Drum Clutch Hub Products," Journal of the Korean Society for Precision Engineering, Vol. 25, No. 12, pp. 33-38, 2008.
  11. Ross, P. J., "Taguchi techniques for quality engineering: loss function, orthogonal experiments, parameter and tolerance design (2nd Edition)," McGraw-Hill, 1996.