Analysis of warping deformation for cold-rolled strips

被引：0
作者：
Zhang, Qing-Dong [1 ]
Lu, Xing-Fu [1 ]
Dai, Jie-Tao [1 ]
Qin, Jian [1 ]
机构：
[1] School of Mechanical Engineering, University of Science and Technology Beijing
来源：
Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing | 2014年 / 36卷 / 03期
关键词：
Analytical models; Cold rolling; Strip steel; Warping;
D O I：
10.13374/j.issn1001-053x.2014.03.016
中图分类号：
学科分类号：
摘要：
The common shape defect of warping deformation, which is caused by the uneven vertical elongation of strips in the thickness direction, was studied by applying symplectic elasticity method. The relationship between the warping value and the distribution of vertical elongation was obtained through establishing and solving a mechanical model of warping deformation. Based on the correctness of the mechanical model and calculated results which were verified by general finite element method, the influence laws of factors on warping deformation were gotten by deduction and calculation. It is shown that the warping value increases linearly with the increasing elongation difference between the top and bottom surfaces and the increasing ratio of the transverse to vertical elongation difference, decreases with increasing strip thickness, but increases quadratically with increasing strip width. Finally, the phenomenon of C-warping converting to L-warping was studied by using the symplectic elasticity model of warping deformation, a mechanical model of C-warping converting to L-warping was established, and the formula for this converting was obtained, which was verified by field experiment.
引用
收藏
页码：378 / 382
页数：4
相关论文
共 15 条
  • [1] Dai J.T., Deformation of warping and longitudinal buckling for thin and wide strip, (2011)
  • [2] Poplawski J.V., Seccombe D.A., Bethlehem's contribution to the mathematical modeling of cold rolling in tandem mills, Iron Steel Eng, 57, 9, (1980)
  • [3] Fisher F.D., Rammerstorfer F.G., Friedl N., Et al., Buckling phenomena related to rolling and levelling of sheet metal, Int J Mech Sci, 42, 10, (1999)
  • [4] Yang Q., Chen X.L., The deforming route of buckled waves of rolled strip, J Univ Sci Technol Beijing, 16, 1, (1994)
  • [5] Bian Y.H., Liu H.M., Universal method analysing the large deflection buckling deformation of rolled strip, Chin J Mech Eng, 30, SUPPL., (1994)
  • [6] Komori K., Analysis of herring-bone mechanism in sheet rolling, J Mater Process Technol, 60, 1-4, (1996)
  • [7] Tarnopolskaya T., Gates D.J., Analysis of the effect of strip buckling on stability of strip lateral motion with application to cold rolling of steel, J Dyn Syst Meas Control, 130, 1, (2008)
  • [8] Mucke G., Karhausen K.F., Putz P.D., Methods of describing and assessing shape deviation in strips, Metall Plant Technol Int, 25, 3, (2002)
  • [9] Fujwara T., Matoba T., Itazuri Y., Et al., Improvement of high-strength steel sheet mechanical properties by rolling with small-diameter rolls, J Jpn Soc Technol Plast, 38, 9, (1997)
  • [10] Masui T., Kaseda Y., Ando K., Warp control in strip processing plant, ISIJ Int, 31, 3, (1991)
12