하이드로 임베딩시 연결요소의 회전을 통한 체결력 개선 연구

Improvement of Connection Force in Hydro-Embedding Process Through the Rotational Piercing of the Connection Element

  • 김봉준 (부산대학교 정밀기계공학과) ;
  • 김동규 (성우하이텍 기술연구소) ;
  • 김동진 (포항제철 기술연구소) ;
  • 문영훈 (부산대학교 정밀기계공학과)
  • 발행 : 2006.12.01


To increase the applicability and productivity of hydroforming process, hydro-embedding process was developed by combining the hydro-forming process with embedding process simultaneously. It is necessary in the automotive parts to form hollow bodies with connection elements which combine one part with another. The hydro-embedding process is embedding the connection element hydraulically during the operating steps of the hydroforming. In this study, technique of rotational piercing is added on the existing hydro-embedding to increase the connection force of hydro-embedded element. To estimate the feasibility of new trial process, integrated researches on the hydro-embedding process technology have been performed by analyzing the deformed mode of the tubes and the optimal process parameters for various shapes of the connection elements.


  1. Schulze, B., 2000, 'Method for Embedding Connection Elements in a Wall,' US Patent, USP 6,134,767
  2. Mario, D. R. and Paolo Giuseppe, G., 1994, 'Process for Fixing a Tubular Reinforcing Insert to a Tubular Metal Structure and Apparatus for Carrying out the Process,' European Patent, EP0593950A1
  3. Mario, D. R. and Paolo Jiyuzetsupe, G., 1994, 'Method and Device for Fixing Tubular Reinforcing Insert into a Tubular Metal Structure,' Japanese Patent, JP6198358
  4. Gerhard, S. and Wolfgang, R., 'Joining Part to Second Part Method,' German Patent, DE19508632
  5. Lee, B. C. and Kim, Y. K., 1989, 'A Parametric Study of Bolt-Nut Joints by the Method of Finite Element Contact Analysis,' Transactions of KSME, Vol. 13, No. 3, pp. 353-361
  6. Hong,S. J., You, J. H. and Lee, D. J., 2005, 'Prediction of the Dynamic Characteristics of a Bolt Joint Plates According ro Bolting Conditions,' Transactions of KSME A, Vol. 29, No. 9, pp.1175-1182