Stretch bending defect control of L-section SUS301L stainless-steel components with variable contour curvatures

  • Zheng-wei Gu
  • Lei Jia
  • Xin Li
  • Li-juan Zhu
  • Hong Xu
  • Ge YuEmail author
Original Paper


The stretch bending of L-section variable-curvature SUS301L stainless-steel roof bending beams for metro vehicles was numerically simulated. The causes of defects such as wrinkling, section distortion, and poor contour accuracy were analysed, and the corresponding control methods were proposed. The simulation results demonstrated that wrinkling in the small-arc segment could be eliminated by setting the die clearance and adjusting the elongation reasonably. Owing to the sidewall shrinkage of the profile in the process of stretch bending, the die groove depth was correspondingly reduced. Each section of the profile was effectively supported by the bottom of the die groove, and the section distortion could be controlled. Springback was the main reason for the poor contour accuracy, which could be compensated by modifying the die surface based on the springback value. Using the above defect control methods, forming experiments were performed on a new type of stretch bending die with variable die clearance and groove depth developed in this work. Finally, high-quality components were obtained, which verified the efficacy of the defect control methods.


Stretch bending L-section Variable contour curvature Stainless-steel profile Defect control 



This work was financially supported by the National Natural Science Foundation of China (51101072) and Technology Development Program of Jilin Province (20150307015GX and 20160204058GX).


  1. [1]
    M.V. Venkatesan, N. Murugan, B.M. Prasad, A. Manickavasagam, J. Iron Steel Res. Int. 20 (2013) No. 1, 71–78.CrossRefGoogle Scholar
  2. [2]
    K.Y. Wang, P.F. Liu, W.M. Zhai, C. Huang, Z.G. Chen, J.M. Gao, Sci. China (Technol. Sci.) 58 (2015) 226–235.CrossRefGoogle Scholar
  3. [3]
    L. Ling, X.B. Xiao, X.S. Jin, Acta Mech. Sin. 30 (2014) 860–875.MathSciNetCrossRefGoogle Scholar
  4. [4]
    K.W. Zhao, J.H. Zeng, X.H. Wang, J. Iron Steel Res. Int. 16 (2009) No. 3, 20–26.CrossRefGoogle Scholar
  5. [5]
    T. Tomioka, S. Tachikawa, Y. Akiyama, Mech. Eng. J. 4 (2017) 16–00467.CrossRefGoogle Scholar
  6. [6]
    M. Eskandari, A. Najafizadeh, A. Kermanpur, M. Karimi, Mater. Des. 30 (2009) 3869–3872.CrossRefGoogle Scholar
  7. [7]
    J. Zhao, R.X. Zhai, Z.P. Qian, R. Ma, Int. J. Mech. Sci. 75 (2013) No. 1, 45–54.CrossRefGoogle Scholar
  8. [8]
    F. Paulsen, T. Welo, J. Mater. Process. Technol. 58 (1996) 274–285.CrossRefGoogle Scholar
  9. [9]
    A.H. Clausen, O.S. Hopperstad, M. Laugseth, Int. J. Mech. Sci. 43 (2001) 427–453.CrossRefGoogle Scholar
  10. [10]
    O.S. Hopperstad, T. Berstad, H. Ilstad, O.G. Lademo, M. Langseth, J. Mater. Process. Technol. 80–81 (1988) 551–555.Google Scholar
  11. [11]
    C.G. Liu, X.G. Zhang, X.T. Wu, Int. J. Adv. Manuf. Technol. 82 (2016) 1737–1746.CrossRefGoogle Scholar
  12. [12]
    Z.W. Gu, M.M. Lü, X. Li, H. Xu, J. Iron Steel Res. Int. 23 (2016) 525–530.CrossRefGoogle Scholar
  13. [13]
    K. Nakajima, N. Utsumi, M. Yoshida, Int. J. Precis. Eng. Manuf. 14 (2013) 965–970.CrossRefGoogle Scholar
  14. [14]
    K.X. Liu, Y.L. Liu, H. Yang, Int. J. Adv. Manuf. Technol. 69 (2013) 627–636.CrossRefGoogle Scholar
  15. [15]
    K.X. Liu, Y.L. Liu, H. Yang, Int. J. Precis. Eng. Manuf. 15 (2013) 633–641.CrossRefGoogle Scholar
  16. [16]
    K.X. Liu, Y.L. Liu, H. Yang, Int. J. Adv. Manuf. Technol. 68 (2013) 1867–1874.CrossRefGoogle Scholar
  17. [17]
    L.J. Fu, X.H. Dong, P. Wang, Int. J. Adv. Manuf. Technol. 43 (2009) 1069–1080.CrossRefGoogle Scholar
  18. [18]
    M.H. Chen, L. Gao, in: Z.J. Yuan, X.P. Xu (Eds.), Advances in Machining & Manufacturing Technology VIII, Key Engineering Materials, Hangzhou, 2006, pp. 416–420.Google Scholar
  19. [19]
    H.W. Shen, Y.L. Liu, H.Y. Qi, H. Yang, S.H. Zhou, Int. J. Adv. Manuf. Technol. 68 (2013) 651–662.CrossRefGoogle Scholar
  20. [20]
    H. Zhu, K.A. Stelson, J. Manuf. Sci. Eng. 125 (2003) 113–119.CrossRefGoogle Scholar
  21. [21]
    E.H. Ouakdi, R. Louahdi, D. Khirani, L. Tabourot, Mater. Des. 35 (2012) 106–112.CrossRefGoogle Scholar
  22. [22]
    J.C. Liang, S. Gao, F. Teng, P.Z. Yu, X.J. Song, Int. J. Adv. Manuf. Technol. 71 (2014) 1939–1947.CrossRefGoogle Scholar

Copyright information

© China Iron and Steel Research Institute Group 2019

Authors and Affiliations

  • Zheng-wei Gu
    • 1
  • Lei Jia
    • 1
  • Xin Li
    • 1
  • Li-juan Zhu
    • 1
  • Hong Xu
    • 1
  • Ge Yu
    • 1
    • 2
    Email author
  1. 1.Department of Materials Science and EngineeringJilin UniversityChangchunChina
  2. 2.Roll Forging Research InstituteJilin UniversityChangchunChina

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