Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Evaluation of Servo Press Slide Motion for Springback Reduction of High Strength Steel

고장력강판의 스프링백 저감을 위한 서보프레스 슬라이드모션 평가

  • Received : 2017.05.15
  • Accepted : 2017.08.23
  • Published : 2017.10.01
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Abstract

Vehicle weight reduction is a known strategy to improve fuel efficiency and strengthen exhaust gas regulation. The use of high strength steel can satisfy safety, efficiency, emission, manufacturability, durability, and cost requirements. However, springback of high strength steel results in undesired shape defects. Springback is one of the most important issues of high strength steel for many applications in an automobile. Servo press has various capabilities to improve defects, process conditions, and productivity problems when forming a high strength steel. Especially, servo press can be set to function with variable slide motion in a single operation. In this study, the effect of servo press slide motion on 980MPa high strength steel was investigated through U-bending test.

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References

  1. M. Y. Demeri, 2013, Advanced High-Strength Steel: Science, Technology, Application, ASM International.
  2. H. Komine, M. Asakura, T. Geka, T. Kiso, M. Takamura, T. Sugiyama, M. Asakawa, 2016, Reduction of Springback for Hat Channel with High-strength Steel Sheets by Stroke-returning Deep-drawing Process, J. Jpn. Soc. Technol. Plast., Vol. 57, No. 660, pp. 60-65. https://doi.org/10.9773/sosei.57.60
  3. T. Yoshida, K. Sato, E. Isogai, K. Hashimoto, 2014, Springback Problems in Forming of High-strength Steel Sheets and Countermeasures, Nippon Steel Technical Report, Vol. 103, pp. 4-10.
  4. N. Shinomiya, N. Shirakawa, 2013, Estimation of Numerical Control Servo Press Motion for Deep Drawing, J. Jpn. Soc. Technol. Plast., Vol. 54, No. 629, pp. 78-82.
  5. Y. Tamai, Y. Yamasaki, A. Yoshitake, T. Imura, 2010, Improving Deep Drawability of Steel Sheet by Motion Control of Servo Press, J. Jpn. Soc. Technol. Plast., Vol. 51, No. 592, pp. 68-72.
  6. N. Shinomiya, N. Shirakawa, 2015, Improved form Accuracy Througt Slide Motion Control in Impact Extrusion of Square Cups, J. Jpn. Soc. Technol. Plast., Vol. 56, No. 654, pp. 47-52. https://doi.org/10.9773/sosei.56.47
  7. T. Iwata, N. Iwata, S. Hotta, 2015, Material Model Incorporating Strain Rate and Sheet Metal Forming Analysis Under Slide Motion, J. Jpn. Soc. Technol. Plast., Vol. 56, No. 658, pp. 81-86.
  8. N. Shinomiya, N. Shirakawa, 2013, Estimation of Numerical Control Servo Press Motion for Deep Drawing, J. Jpn. Soc. Technol. Plast., Vol. 54, No. 629, pp. 78-82.
  9. K. H. Kang, S. H. Kim, H. C. Ro, 2016, Change in Springback Tendency during Forming of a Hat-type Product with High Strength Steel using a Digital Servo Press, Trans. Mater. Process., Vol. 25, No. 1, pp. 21-28. https://doi.org/10.5228/KSTP.25.1.21