대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제34권8호
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  • Pages.997-1006
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  • 2010
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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Al5052 합금소재와 고장력강판의 이종재료 클린칭 접합특성

Characteristic of Mechanical Clinching for Al5052 to High-Strength Steels

  • 이찬주 (부산대학교 기계공학부) ;
  • 이상곤 (부산대학교 PNU-IFAM JRC 공학부) ;
  • 이선봉 (계명대학교 기계자동차공학부) ;
  • 김병민 (부산대학교 기계공학부)
  • Lee, Chan-Joo (Dept. of Mechanical Engineering, Pusan Nat'l Univ.) ;
  • Lee, Sang-Kon (PNU-IFAM Joint Research Center, Pusan Nat'l Univ.) ;
  • Lee, Seon-Bong (Faculty of Mechanical and Automotive Engineering, Keimyung Univ.) ;
  • Kim, Byung-Min (Dept. of Mechanical Engineering, Pusan Nat'l Univ.)
  • 투고 : 2010.01.21
  • 심사 : 2010.06.14
  • 발행 : 2010.08.01
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초록

차체 경량화를 위해 알루미늄과 같은 경량금속의 사용은 이종소재 사용은 새로운 접합기술을 요구한다. 클린칭 접합은 이종소재 접합기술 중의 하나로 접합소재의 강도차이에 의해 접합특성이 달라진다. 본 연구에서는 Al5052 합금소재에 대한 고장력강판(SPFC440, 590, 780)에 대한 클린칭 접합특성을 평가하였다. 유한요소해석과 인장전단시험을 통해 클린칭 접합특성인 클린칭 접합의 기학적 구속량과 접합강도를 평가하였다. 상부소재가 고장력강판인 경우, SPFC780 은 상부소재의 네킹으로 클린칭 접합이 불가능하였다. 또한 상부소재의 강도가 증가함에 따라 접합강도가 증가하는 특성을 나타내었다. 하부소재가 고장력강판인 경우, 기하학적 구속량인 목두께 및 언더컷과 접합강도는 하부소재의 강도가 증가함에 따라 감소하는 경향을 나타내었다.

For manufacturing modern cars, so-called multi-materials, such as aluminum alloy with high-strength steels, are used. For obtaining such materials, a new joining method is required to achieve the multi-material design. Mechanical clinching is one of joining methods used to join the dissimilar materials. The objective of this study is to investigate the characteristics of mechanical clinching of Al5052 alloy to high-strength steels (SPFC440, 590, 780). Using FE-analysis and clinching experiment, the joinability of Al5052 alloy to high-strength steel is evaluated by geometrical shape of mechanical clinched joint, such as neck-thickness and undercut. Further, the joint strength is evaluated by performing a single-lap shear test. The upper high-strength steel SPFC780 was not clinched because of the necking of the upper sheet. The joint strength increased with increasing strength of the upper sheet. For the lower high-strength steel sheet, the joinability and joint strength decreased with increasing strength of the lower sheet.

키워드

참고문헌

  1. Kim, J.Y., Lee, C.J., Lee, S.K., Ko, D.C. and Kim, B.M., 2009, “Effect of Shape Parameters of Tool on Improvement of Joining Strength in Clinching,” Trans. of Mat. Proc., Vol. 18, No. 5, pp. 393-400. https://doi.org/10.5228/KSPP.2009.18.5.392
  2. Lim, D.H., Lee, B.W., Rhyu, H.H. and Kim, H.K., 2003, “An Experimental Study on the Strength Evaluation of Al-5052 Tensile-Shear Speciments Using a Mechanical Press Joining Method,” Trans. of KSMTE, Vol. 12, No. 1, pp. 58-64.
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  7. Varis, J. and Lepisto, J., 2003, “A Simple Testing-Based Procedure and Simulation of the Clinching Process Using Finite Element Analysis for Establishing Clinching Parameters,” Thin Wall Struct., Vol. 41, pp. 691-709. https://doi.org/10.1016/S0263-8231(03)00026-0
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피인용 문헌

  1. Clinching for sheet materials vol.18, pp.1, 2017, https://doi.org/10.1080/14686996.2017.1320930