Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지
DOI QR코드

DOI QR Code

Studies on the Shape Optimization of Connecting Element for Hydro-Embedding

하이드로 임베딩시 체결용 연결요소의 형상 최적화 연구

  • 김봉준 (부산대학교 정밀기계공학과) ;
  • 김동규 (부산대학교 정밀기계공학과) ;
  • 김동진 (POSCO 자동차강재가공연구센터) ;
  • 문영훈 (부산대학교 정밀기계공학과/정밀정형 및 금형가공 연구소)
  • Published : 2005.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

The applicability and productivity of hydroforming process can be increased by combining pre- and post-forming processes such as the bending, piercing and embedding process. For the fabrication of automotive parts, the hollow bodies with connecting nuts are widely used to connect parts together. Hollow body with connecting nuts has been conventionally fabricated by welding nuts or screwing in autobody screws. It requires multiple steps and devices fur the welding and/or screwing Therefore in this study, hydro-embedding process that combines the hydraulic embedding of connecting element(nut) with hydroforming process is investigated. Studies on the hydro-embedding technology have been performed to optimize the shape of the connecting element by analyzing the deformed mode of the embedded tube The effects of the shape of the screw tip, screw thread and shape of thread on the connection force between the tube and the connecting element have been investigated to optimize the shape of connecting element. Finite element analysis has also been performed to provide deformation behaviors of the tube surrounding a hole produced by hydro-embedding.

Keywords

References

  1. F. Dohmann and C. Hardt, 1996, Hydroforming-A method to manufacture lightweight parts, Journal of Materials Processing Technology, Vol. 60, pp. 669- 676 https://doi.org/10.1016/0924-0136(96)02403-X
  2. 김봉준, 김정운, 문영훈, 2002, 하이드로포밍 성형성에 미치는 공정인자 영향도 해석, 한국소성가공학회지, Vol. 11, pp. 54-60
  3. K. Brewster, K. Sutter, M. Ahmetoglu, T. Altan, 1996, Hydrofo rming tube, The Tube and Pipe Quarterly, Vol. 7, No. 4, pp. 34-40
  4. Muammer Koc, Yingyot A., T. Altan, 2001, On the characteristics of tubular materials for hydroformingexperimentation and analysis, International Journal of Machine Tools and Manufacture, Vol.41, pp. 761-772 https://doi.org/10.1016/S0890-6955(00)00070-5
  5. W. Rimkus, H. Bauer, M. J. A. Mihsein, 2000, Design of load-curves for hydroforming applications, Journal of Materials Processing Technology, Vol.108, pp. 97-105 https://doi.org/10.1016/S0924-0136(00)00738-X
  6. N. Asnafi, A. Skogsgardh, 2000, Theoretical and Experimental analysis of stroke-controlled tube hydroforming, Materials Science and Engineering, Vol. A279, pp. 95-110
  7. A. Kellicut, B. Cowell, K. Kavikondala, T. Dutton, S. Iregbu, R. Sturt, 1999, Application of the results of forming simulation in crash models, NUMISHEET199, 13- 17 Sep, Besancon-France, pp. 509-514
  8. B. Schulze, Method for embedding connection elements in a wall, US Patent, USP 6,134,767, 2000
  9. D. R. Mario, G. Paolo Giuseppe, 1994, Process for fixing a tubular reinforcing insert to a tubular metal structure and apparatus for carrying out the process, European Patent, EP0593950A 1
  10. D. R. Mario, G. Paolo Jiyuzetsupe, 1994, Method and device for fixing tubular reinforcing insertinto a tubular metal structure, Japanese Patent, JP6198358
  11. S. Gerhard, R. Wolfgang, Joining part to second part method, German Patent, DE19508632