Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Slide Motion Control and Friction Characteristics on Formability of Ultra High Strength Steel

초고강도강판의 성형성에 미치는 슬라이드 모션 제어와 마찰특성의 영향

  • 송재선 (대구기계부품연구원 뿌리산업혁신본부) ;
  • 윤국태 (대구기계부품연구원 뿌리산업혁신본부) ;
  • 허재영 (대구기계부품연구원 뿌리산업혁신본부) ;
  • 박춘달 (대구기계부품연구원 뿌리산업혁신본부) ;
  • 김용환
  • Received : 2017.12.05
  • Accepted : 2018.01.19
  • Published : 2018.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

Although the application of high strength steel is increasing to cope with the various updated regulations of automobiles, high strength steel sheets are difficult to formulate due to the high tensile strength and low elongation of those materials. In this study, the slide motion was controlled using a servo press in order to improve the formability of the process of manufacturing ultra-high strength steel of above 1.2GPa. Also, the friction characteristics of the slid motion were investigated through a high speed friction test. The slide motion was optimized by adjusting the number of steps, the rising start position and the rise height of the slide. At the same time, it is noted that the optimal slide motion increased the forming depth by about 40%. From the results of the high speed friction test, the application of the slide motion reduces friction resistance, thereby improving friction characteristics and improving formability.

Keywords

References

  1. M. Y. Demeri, 2013, Advanced High-Strength Steel: Science, Technology, Application, ASM International
  2. J. S. Song, K. T. Youn, C. D. Park, J. Y. Heo, Y. H. Kim, 2017, Evaluation of Servo Press Slide Motion for Springback Reduction of High Strength Steel, Trans. Mater. Process., Vol. 26, No. 5, pp. 277-285. https://doi.org/10.5228/KSTP.2017.26.5.277
  3. 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
  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, 2013, Estimation of Numerical Control Servo Press Motion for Deep Drawing, J. Jpn. Soc. Technol. Plast., Vol. 54, No. 629, pp. 78-82.
  7. 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
  8. J. E. Kim, J. Y. Heo, I. C. Yoon, J. S. Song, K. T. Youn, C. D. Park, 2015, Evaluation of Friction Characteristics for High-Strength-Steel Sheets Depending on Condition, Trans. Mater. Process., Vol. 24, No. 6, pp. 381-386. https://doi.org/10.5228/KSTP.24.6.381