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Journal of mechanical science and technology v.21 no.10, 2007년, pp.1523 - 1527   피인용횟수: 2

Development of automotive engine cradle by hydroforming process

Kim, K.J.    (AE Team, Ssangyong Motor Company   ); Kim, J.S.    (AE Team, Ssangyong Motor Company   ); Choi, B.I.    (Korea Institute of Machinery & Materials   ); Kim, K.H.    (Automotive Steel Application Research Group, POSCO   ); Choi, H.H.    (Automotive Steel Application Research Group, POSCO   ); Kim, C.W.    (Mechanical Engineering, U&I Corporation Research Center, Korea University   ); Kang, K.W.    (Department of Sports Eng., Korea Sport Science Institute   ); Song, J.H.    (Metallurgical Engineering Lab., Korea Automotive Tech. Institute   ); Sung, C.W.    (Department of Mechanical Engineering, Kyung Hee University  );
  • 초록

    The hydroforming technology may bring many advantages to automotive applications in terms of better structural integrity of the parts, lower cost from fewer part count, material saving, weight reduction, lower springback, improved strength and durability and design flexibility. In this study, the whole process of front sub-frame parts development by tube hydroforming using steel material having tensile strength of 440 MPa grade is presented. At the part design stage, it requires feasibility study and process design aided by CAE (Computer Aided Design) to confirm hydroformability in details. Effects of parameters such as internal pressure, axial feeding and geometry shape in automotive engine cradle by the hydroforming process were carefully investigated. Overall possibility of hydroformable engine cradle parts could be examined by cross sectional analyses. Moreover, it is essential to ensure the formability of tube material on every forming step such as pre-bending, preforming and hydroforming. At the die design stage, all the components of prototyping tool are designed and interference with the press is examined from the point of deformed geometry and local thinning.


  • 주제어

    Hydroforming .   Engine cradle .   Axial feeding .   Bending .   Thinning.  

  • 참고문헌 (5)

    1. S. Nakamura, H. Sugiura, H. Onoe, K. Ikemoto, Hydromechanical drawing of automotive parts, Journal of Materials Processing Technology. 46 (1994) 491-503 
    2. F. Dohmann, Ch. Hartl, Tube hydroformingresearch and practical application, Journal of Materials Processing Technology. 71 (1997) 174-186 
    3. N. Asnafi, Analytical modeling of tube hydroforming, Thin-Walled Structure. 34 (1999) 295-330 
    4. M. Ahmetoglu, T. Altan, Tube hydroforming-State-of-the-art and future trends, Journal of Materials Processing Technology. 98 (2000) 25-33 
    5. M. Ahmetoglu, K. Sutter, S.J. Li, T. Altan, Tube hydroforming: current research, applications and need for training, Journal of Materials Processing Tech-nology. 98 (2000) 224-231 
  • 이 논문을 인용한 문헌 (2)

    1. 2008. "" International journal of precision engineering and manufacturing, 9(3): 55~58     
    2. Jang, Hwan-Hak ; Park, Gyung-Jin ; Kim, Tai-Kyung 2015. "Preliminary Study on Optimization of the Tube Hydroforming Process Using the Equivalent Static Loads" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. A. A, 39(3): 259~268     

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