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| Metal transverse flow of strips rolled by 2 250 mm CVC 4-high hot rolling mill |
| ZHANG Yu-tao， YANG Guang-hui， ZHANG Gao-shang， HAN Yue-lin |
| （School of Mechanical Engineering， University of Science and Technology Beijing， Beijing 100083， China） |
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Abstract To improve the flatness control precision of the 2 250 mm CVC 4-high hot rolling mill， the nonlinear software MSC Marc was used to establish the dynamic rigid roll-elastoplastic strip coupling model. In order to improve the accuracy of the simulation，the shape of the loaded roll gap was calculated with the static elastic rolls-elastoplastic strip coupling model as the initial roll shape of the dynamic simulation. It was found that the metal transverse flow of strips gradually increased with the increasing of the distance from the center of strips by analysis. Friction is an important factor which affects the metal transverse flow among different thicknesses of metal. The metal comprehensive transverse flow of strips was linear with the reduction rate，the roll bending force，the initial strip crown and the work roll shifting. The influence coefficient function of each factor was established for the quantitative analysis and orthogonal experiments were tested to judge their interaction relations through the variance analysis. Finally，an interpolation calculation model of metal transverse flow of strips was established and its correctness was verified by simulation results. An important reference for the online shape control of the corresponding rolling mill is provided.
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Received: 15 August 2018
Published: 15 March 2019
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2019, Vol. 54 
