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Practice of Improving Roll Deformation Theory in Strip Rolling Process Based on Boundary Integral Equation Method

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Abstract

Precise strip-shape control theory is significant to improve rolled strip quality, and roll flattening theory is a primary part of the strip-shape theory. To improve the accuracy of roll flattening calculation based on semi-infinite body model, a new and more accurate roll flattening model is proposed in this paper, which is derived based on boundary integral equation method. The displacement fields of the finite length semi-infinite body on left and right sides are simulated by using finite element method (FEM) and displacement decay functions on left and right sides are established. Based on the new roll flattening model, a new 4Hi mill deformation model is established and verified by FEM. The new model is compared with Foppl formula and semi-infinite body model in different strip width, roll shifting value and bending force. The results show that the pressure and flattening between rolls calculated by the new model are more precise than other two models, especially near the two roll barrel edges.

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Acknowledgment

This work is supported by the National Natural Science Foundation of China (No. 51075353).

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Authors and Affiliations

  1. National Engineering Research Council for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao, 066004, Hebei, P.R. China

    Zhengwen Yuan (Ph.D. student), Hong Xiao (Professor, Dean) & Hongbiao Xie (Associate Professor)

  2. College of Mechanical Engineering, Yanshan University, Qinhuangdao, 066004, Hebei, P.R. China

    Zhengwen Yuan (Ph.D. student), Hong Xiao (Professor, Dean) & Hongbiao Xie (Associate Professor)

Authors
  1. Zhengwen Yuan
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  2. Hong Xiao
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  3. Hongbiao Xie
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Correspondence to Hong Xiao.

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Manuscript submitted December 31, 2012.

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Yuan, Z., Xiao, H. & Xie, H. Practice of Improving Roll Deformation Theory in Strip Rolling Process Based on Boundary Integral Equation Method. Metall Mater Trans A 45, 1019–1026 (2014). https://doi.org/10.1007/s11661-013-2099-7

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  • DOI: https://doi.org/10.1007/s11661-013-2099-7

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