Abstract
Advanced high-strength steel (AHSS) is widely used in automobile manufacturing to reduce the weight of vehicles, thereby improving fuel efficiency. However, the high yield and tensile strength of AHSS leads to a serious springback problem in the cold sheet metal forming process. This phenomenon has delayed the implementation of AHSS in vehicle parts due to the resulting negative impact on part accuracy. In this study, parameter optimization and multi-stage die compensation were conducted with Finite element (FE) analysis to develop a progressive forming process for automobile structural members using DP980. The FE simulation used the Yoshida-Uemori model to predict the springback phenomenon accurately. The key parameters that significantly influence the springback behavior were optimized using FE simulation and the Taguchi method. The simulation results were used to determine the die and mold compensation. After the parameter optimization and multi-stage die compensation, the final part was obtained with acceptable dimensional accuracy.
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Recommended by Associate Editor Dae-Chul Ko
Do-Sik Shim received Ph.D. in Mechanical Engineering from KAIST, Korea in 2010. He has been a senior researcher at KITECH since 2012. His research interests include incremental and roll forming for sheet metal, direct energy deposition (DED) and structural analysis as well as optimal design.
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Lee, EM., Shim, DS., Son, JY. et al. Study on design of progressive dies for manufacture of automobile structural member using DP980 advanced high strength steel. J Mech Sci Technol 30, 853–864 (2016). https://doi.org/10.1007/s12206-016-0140-7
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DOI: https://doi.org/10.1007/s12206-016-0140-7