Variable gauge rolling is a new process to obtain a plate for which the thickness changes continuously by continu-ously and dynamically adjusting the roll gap upward and downward in the rolling process.This technology is an effective method for producing lightweight,low-cost,and economical plates.However,variable gauge rolling is an unsteady process,and the changes in the force and deformation parameters are complex.In this research,based on the minimum energy theory of the variational principle and considering the characteristics of the roll movement and workpiece deformation comprehensively,the internal plastic deformation,friction,shear and tension powers,and the minimum result of the total power functional in upward and downward rolling are obtained with the first integral and then with a variation of adopting the specific plastic power and strain rate vector inner product.The analytical results of the deformation and force parameters are also established using the variational method.Then the precision of this model is certified using the measured values in a medium plate hot rolling plant and the experimental data for Tailor Rolled Blank rolling.Good agreement is found.Additionally,the variation rule of bite angle,neutral angle,and location neutral points are shown,and the change mechanism of the friction parameter on the stress state effect coefficient is given in variable gauge rolling.This research proposes a new mathematical model for rolling process control that provides a scientific basis and technical support for obtaining an accurate section shape in variable gauge rolling production.

Yuanming Liu;Zhenhua Wang;Tao Wang;Jie Sun;Xianguang Zheng;Dianhua Zhang;Qingxue Huang

College of Mechanical and Vehicle Engineering,Taiyuan University of Tech-nology,Taiyuan 030024,China;Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment,Ministry of Education,Taiyuan 030024,China;TYUT-UOW Joint Research Center,Taiyuan University of Technology,Taiyuan 030024,China;State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China

中国机械工程学报

[1]Yuanming Liu;Zhenhua Wang;Tao Wang;Jie Sun;Xianguang Zheng;Dianhua Zhang;Qingxue Huang-.Prediction and Analysis of the Force and Shape Parameters in Variable Gauge Rolling)[J].中国机械工程学报,2022(04):269-282

Tailor

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