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

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

The Effects of Process Parameters of Multi-Stage Forming on Springback for a U-Channel made of Ultra-High-Strength Steel

초고강도 소재가 적용된 U 형 채널 제품의 다단공정변수에 따른 스프링백 영향

  • Received : 2011.08.30
  • Accepted : 2012.01.05
  • Published : 2012.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

Ultra-high-strength steels (UHSSs) are widely used for lightweight automobile parts, and the control of springback is very important in sheet-metal forming. The object of this study is to verify the effects of multi-stage forming process parameters for U-channel-type automobile parts made of UHSS. Finite element analysis is carried out to predict the formability and springback. The main parameters considered for the multi-stage forming process are the die angle, die radius, and punch-forming direction. It is shown that multi-stage forming is very effective for reducing springback, and that a small punch-forming angle and die radius reduce springback, whereas the die angle does not have a large effect.

자동차 부품의 경량화를 위해서 초고강도강의 사용이 확대됨에 따라 판재성형 공정에서 초고강도 강판의 스프링백 제어의 중요성이 점차로 확대되고 있다. 본 연구에서는 초고강도 소재를 사용한 U 형채널 부품의 성형을 위해서 사용되는 다단공정에서 공정 변수들이 스프링백에 미치는 영향에 대하여 검토하였다. 해석을 위해서는 유한요소법이 사용되었으며, 주요 공정 변수는 공정수, 금형 각도, 금형 반경, 펀치성형방향이다. 단공정에 비해서 다단공정이 스프링백을 아주 효과적으로 제어할 수 있었으며, 금형반경과 펀치성형방향의 각도가 작을수록 스프링백 제어에 효과적이었다. 그러나 금형 각도의 영향은 크지 않았다.

Keywords

References

  1. Cha, C. H., Lee, S. K., Ko, D. C. and Kim, B. M., 2009, "A Study on the Forming of Automotive Front Side Member Part with Ultra High Strength Steel of DP980," Trans. Mater. Process., Vol. 18. No. 1, pp. 39-44.
  2. Park, I. C., Kim, Y. J., Lee, J. M. and Park, Y. C., 2006, "Optimization of Design Planning by Using the Spring Back Simulation of Auto Panels," Trans. Mater. Process., Vol. 15. No. 2, pp. 164-171.
  3. Suh, C. H., Shin, H. D., Jung, Y-C., Park, C. D., Lim, Y. H. and Kim, Y. S., 2009, "A Study on the Forming Process of Stair Type Side Sill for Automobile Using DP780," Trans. Mater. Process., Vol. 18. No. 8, pp. 601-606.
  4. Asgari, S. A., Pereire, M., Rolfe, B. F., Dingle, M. and Hodgson, P. D., 2008, "Statistical Analysis of Finite Element Modeling in Sheet Metal Forming and Springback Analysis," J. Mater. Process. Technol., Vol. 203, pp. 129-136. https://doi.org/10.1016/j.jmatprotec.2007.09.073
  5. Chen, P. and Koc, M., 2007, "Simulation of Springback Variation in Forming of Advanced High Strength Steels," J. Mater. Process. Technol., Vol. 190, pp. 189-198. https://doi.org/10.1016/j.jmatprotec.2007.02.046
  6. Banu, M., Takamura, M., Hama, T., Naidim, O., Teodosiu, C. and Makinouch, A., 2006, "Simulation of Springback and Wrinkling in Stamping of a Dual Phase Steel Rail-Shaped Part," J. Mater. Process. Technol., Vol. 173, pp. 178-184. https://doi.org/10.1016/j.jmatprotec.2005.11.023
  7. Kim, Y. H., Kim, T. W., Lee, Y. S. and Lee, J. H., 2004, "A Study on the Springback of High Strength TRIP Steel," Trans. Mater. Process, Vol. 13, No. 5. pp. 409-414. https://doi.org/10.5228/KSPP.2004.13.5.409
  8. Yang, D. Y., Lee, S. W., Yoon, J. W. and Yoo, D. J., 1999, "Springback Analysis in Sheet Metal Stamping Processes and Industrial Applications," Trans. Mater. Process., Vol. 8, No. 1, pp. 22-28.
  9. Chae, M. S., Lim, Y. H., Suh, Y. S., Park, C. D. and Kim, Y. S., 2008, "A New Manufacturing Process for the Ring Plate of Automotive Fuel Tank," Trans. Mater. Process, Vol. 17, No. 5, pp. 350-355. https://doi.org/10.5228/KSPP.2008.17.5.350
  10. An, J. H., Ko, D. C., Lee, C. J. and Kim, B. M., 2008, "Springback Compensation of Sheet Metal Bending Process Based on DOE & ANN," Trans. of the KSME (A), Vol. 32, No. 11, pp.990-996. https://doi.org/10.3795/KSME-A.2008.32.11.990
  11. Kwak, E. J., Lee, K., Suh, C. H. and Lim, Y. H., "Quantitative Analysis of Elastic Recovery Behavior After Bending of Ultra High Strength Steel Sheet:Spring-Back or Spring-Go," Trans. Mater. Process, Vol. 20, No. 6, pp. 456-460. https://doi.org/10.5228/KSTP.2011.20.6.456

Cited by

  1. Process Design of Automobile Seat Rail Lower Parts using Ultra-High Strength, DP980 Steel vol.17, pp.2, 2018, https://doi.org/10.14775/ksmpe.2018.17.2.160