Journal of Iron and Steel Research International

, Volume 25, Issue 9, pp 901–909 | Cite as

A rapid calculation method for predicting roll deformation of six-high rolling mill

  • Li Xie
  • An-rui HeEmail author
  • Chao Liu
Original Paper


The method to predict roll deformation precisely and efficiently is vital for the strip shape control of a six-high rolling mill. Traditional calculation methods of roll deformation, such as the finite element method and the influence function method, have been widely used due to their accuracies. However, the required calculation time is too long to be applied to the real-time control. Therefore, a rapid calculation method for predicting roll deformation of a six-high rolling mill was proposed, which employed the finite difference method to calculate the roll deflection and used a polynomial to describe the nonlinear relationship between roll flattening and roll contact pressure. Furthermore, a new correction strategy was proposed in the iteration, where the roll center flattening and the roll flattening deviation were put forward and corrected simultaneously in the iteration process according to the static equilibrium of roll. Finally, by the comparison with traditional methods, the proposed method was proved to be more efficient and it was suitable for the online calculation of the strip shape control.


Six-high rolling mill Roll deformation Influence function method Rapid calculation method Online model 



This work was financially supported by the National Natural Science Foundation of China (51674028), and Fundamental Research Funds for the Central Universities (FRF-IC-16-001).


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Copyright information

© China Iron and Steel Research Institute Group 2018

Authors and Affiliations

  1. 1.National Engineering Research Center for Advanced Rolling TechnologyUniversity of Science and Technology BeijingBeijingChina

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