Abstract
Roll forming has been widely used to manufacture long channels with complex cross-sections. End flare, one of the typical shape errors, seriously affects the forming accuracy of roll-formed parts, especially using advanced high-strength steel. In this paper, the mechanism of end flare during the roll forming process of a high-strength automobile seat rail is analyzed. The roll forming process of an actual seat rail is designed. The finite element models of the roll forming process and cut-off springback are established to predict the deformation process and occurrence of end flare. Simulation results indicate that the uneven distribution of longitudinal and shear residual stress along the length of the part is the main reason for the end flare. Based on the simulation, two strategies are proposed to mitigate the end flare. Employing multiple bending processes in the transverse direction effectively balances the longitudinal and shear residual stress. Additionally, the longitudinal bending process can make the longitudinal residual stress in the roll-formed parts more homogenised. Finally, verification experiments are carried out, and the forming accuracy of the seat rail is significantly improved.
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Abbreviations
- AHSS:
-
Advanced high-strength steel
- CT:
-
Compression–tension
- LUL:
-
Loading–unloading–loading
References
Li, Y., Sun, Y., Xiao, H., et al.: A numerical study on chain-die forming of the AHSS U-channel and contrast with roll forming. Int. J. Mech. Sci. 135, 279–293 (2018)
Sweeney, K., Grunewald, U.: The application of roll forming for automotive structural parts. J. Mater. Process. Technol. 132(1–3), 9–15 (2003)
Paralikas, J., Salonitis, K., Chryssolouris, G.: Investigation of the effect of roll forming pass design on main redundant deformations on profiles from AHSS. Int. J. Adv. Manuf. Technol. 56(5–8), 475–491 (2011)
Zeng, G., Li, S., Yu, Z.: Optimization design of roll profiles for cold roll forming based on response surface method. Mater. Des. 30(6), 1930–1938 (2009)
Badr, O.M., Rolfe, B., Weiss, M.: Effect of the forming method on part shape quality in cold roll forming high strength Ti–6Al–4V sheet. J. Manuf. Process. 32, 513–521 (2018)
Traub, T., Chen, X., Groche, P.: Experimental and numerical investigation of the bending zone in roll forming. Int. J. Mech. Sci. 131–132, 956–970 (2017)
Abvabi, A., Rolfe, B., Hodgson, P.D.: The influence of residual stress on a roll forming process. Int. J. Mech. Sci. 101–102, 124–136 (2015)
Wiebenga, J.H., Weiss, M., Rolfe, B.: Product defect compensation by robust optimization of a cold roll forming process. J. Mater. Process. Technol. 213(6), 978–986 (2013)
Han, F., Wang, Y., Niu, L.: Deformation mechanism analysis of roll forming for Q&P980 steel based on finite element simulation. J. Iron. Steel Res. Int. 26(11), 1178–1187 (2019)
Cheng, J., Cao, J., Zhao, Q.: A novel approach to springback control of high-strength steel in cold roll forming. Int. J. Adv. Manuf. Technol. 107(3–4), 1793–1804 (2020)
Safdarian, R., Moslemi, N.H.: The effects of forming parameters on the cold roll forming of channel section. Thin-Walled Struct. 92, 130–136 (2015)
Zhang, W., Zhao, G., Fu, Q.: Optimization of roll forming process for high-strength V channel steels. Int. J. Adv. Manuf. Technol. 105(5–6), 2469–2480 (2019)
Abeyrathna, B., Rolfe, B., Weiss, M.: The effect of process and geometric parameters on longitudinal edge strain and product defects in cold roll forming. Int. J. Adv. Manuf. Technol. 92(1–4), 743–754 (2017)
Saffe, S., Nagamachi, T., Ona, H.: Mechanism of end deformation after cutting of light gauge channel steel formed by roll forming. Mater. Trans. 56(2), 187–192 (2015)
Moneke, M., Groche, P.: Counter measures to effectively reduce end flare. In: 20th International ESAFORM Conference on Material Forming. Dublin City Univ, Dublin, IRELAND (2017)
Moneke, M., Groche, P.: Control of residual stresses in roll forming through targeted adaptation of the roll gap. J. Mater. Process. Technol. 294, 117129 (2021)
Wagoner, R.H., Lim, H., Lee, M.G.: Advanced issues in springback. Int. J. Plast. 45, 3–20 (2013)
Liu, X., Cao, J., Huang, S.: Experimental and numerical prediction and comprehensive compensation of springback in cold roll forming of UHSS. Int. J. Adv. Manuf. Technol. 111(3–4), 657–671 (2020)
Sun, L., Wagoner, R.H.: Proportional and non-proportional hardening behavior of dual-phase steels. Int. J. Plast. 45, 174–187 (2013)
Liu, X., Cao, J., Chai, X.: Investigation of forming parameters on springback for ultra high strength steel considering Young’s modulus variation in cold roll forming. J. Manuf. Process. 29, 289–297 (2017)
Li, Y., Liang, Z., Zhang, Z.: An analytical model for rapid prediction and compensation of springback for chain-die forming of an AHSS U-channel. Int. J. Mech. Sci. 159, 195–212 (2019)
Chaboche, J.L.: A review of some plasticity and viscoplasticity constitutive theories. Int. J. Plast 24(10), 1642–1693 (2008)
Saffe, S., Nagamachi, T., Ona, H.: Residual stress around cut end of hat steel channel by roll forming. Procedia Eng. 81, 239–244 (2014)
Acknowledgements
The authors would like to acknowledge the support of National Science Foundation of China (Grant Nos. 51705315 and U1860110), and financial support from Bao Steel Company.
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T.Z.: Resources, Methodology, Experiments, Writing—Original Draft; Y.L.: Simulation, Writing—Original Draft; W.T.: Funding acquisition, Methodology, Conceptualization; D.L.: Resources, Funding acquisition, Conceptualization, Writing—Review & Editing, Supervision.
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Zou, T., Liu, Y., Tang, W. et al. Analysis and Suppression of End Flare in AHSS Roll-Formed Seat Rail. Automot. Innov. 6, 404–413 (2023). https://doi.org/10.1007/s42154-023-00240-5
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DOI: https://doi.org/10.1007/s42154-023-00240-5