Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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Optimization of blank geometry for the stamping process of B-pillar using design of experiments

실험 계획법을 사용한 B-Pillar 성형공정에서 블랭크 형상 최적화

  • Youn, Hyung-Won (Dept. of Mechanical System Design and Engineering, Seoul National University of Science and Technology) ;
  • Choi, Yong-seok (Dept. of Mechanical System Design and Engineering, Seoul National University of Science and Technology) ;
  • Lee, Chang-Whan (Dept. of Mechanical System Design and Engineering, Seoul National University of Science and Technology)
  • 윤형원 (서울과학기술대학교 기계시스템디자인공학과) ;
  • 최용석 (서울과학기술대학교 기계시스템디자인공학과) ;
  • 이창환 (서울과학기술대학교 기계시스템디자인공학과)
  • Received : 2021.05.06
  • Accepted : 2021.06.30
  • Published : 2021.06.30
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Abstract

The shape of the blank greatly affects the formability and quality of the product after the stamping process. In this study, the geometry of the B-Pillar blank in the stamping process was optimized using design of experiments. The geometry of the blank for the B-pillar was simplified with the two length values and two radius values. The effects of design variables were studied through the Design of experiments. The stamping process of the B-pillar was predicted with the Finite Element Analysis (FEA). The optimized blank geometry was obtained. It results in the reduced maximum equivalent plastic strain. The local necking and the wrinkling did not occurred with the optimized blank geometry.

Keywords

Acknowledgement

본 연구는 정부의 재원으로 한국연구재단(NRF)의 지원을 받아 수행되었습니다. (과제 번호 : NRF-2020R1C1C1014412)

References

  1. M. Karima, "Practical application of process simulation in stamping", Journal of materials processing technology, Vol. 45, pp. 309-320, 1994. https://doi.org/10.1016/0924-0136(94)90118-X
  2. H. H. Bok, M. G. LEE, E. J. Pavlina, F. Barlat, & H. D. Kim, "Comparative study of the prediction of microstructure and mechanical properties for a hot-stamped B-pillar reinforcing part", International journal of mechanical sciences, Vol. 53. No. 9, pp. 744-752, 2011.
  3. S. R. Lee, S. M. Park, S. M. Hong, "Optimization of Initial Blank Shape of Multi-stage Deep Drawing for Improvement of Formability", Journal of the Korea Academia-Industrial cooperation Society, Vol. 17, No. 10, pp. 696-701, 2016. https://doi.org/10.5762/KAIS.2016.17.10.696
  4. R. George, A. Bardelcik, M. J. Worswick, "Hot forming of boron steels using heated and cooled tooling for tailored properties", Journal of Materials Processing Technology, Vol. 212, No. 11, pp. 2386-2399, 2012. https://doi.org/10.1016/j.jmatprotec.2012.06.028
  5. K. S. Chung, O. Richmond, "Ideal forming I. Homogeneous deformation with minimum plastic work", International Journal of Mechanical Sciences, Vol. 34, No. 7, pp. 575-591, 1992. https://doi.org/10.1016/0020-7403(92)90032-C
  6. K. S. Chung, Owen Richmond, "Ideal forming II. Sheet forming with optimum deformation", International Journal of Mechanical Sciences, Vol. 34, No. 8, pp. 617-633, 1992. https://doi.org/10.1016/0020-7403(92)90059-P
  7. S. H. Park, J. W. Yoon, D. Y. Yang, Y. H. Kim, "Optimum blank design in sheet metal forming by the deformation path iteration method, International", Journal of Mechanical Sciences, Vol. 41, No. 10, pp. 1217-1232, 1999. https://doi.org/10.1016/S0020-7403(98)00084-8
  8. H. S. Choi, B. M. Kim, C. G. Kang, S. Y. Ha, D. H. Lee, "Optimization of Blank Shape for Hot Stamping of Center Pillar", The Korean Society Of Automotive Engineers. pp. 2439-2445, 2009.
  9. J. Kim, B. Kim, C. Kang, "Blank Shape Design Process for a Hot Stamped Front Pillar and its Experimental Verification", Transactions of materials processing, Vol. 21, No. 3, pp. 186-194. 2012. https://doi.org/10.5228/KSTP.2012.21.3.186
  10. NUMISHEET 2008, The Numisheet Benchmark Study, Benchmark Problem BM03, Interlaken, Switerzerland, Sept. 2008.