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| Instability of roll nonlinear system with structural clearance in rolling process |
| Jin-xing Cui1, Yan Peng1, Jin Wang1 |
| 1 National Engineering Research Center for Equipment and Technology of Cold Rolled Strip, School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China |
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Abstract The vibration instability of the nonlinear dynamic system of the rolls considering the structural clearance was theoretically investigated, which is caused by the roll assembly accuracy deviation in the hot rolling process. Firstly, the dynamic rolling force model was established based on the Wekbrod model under the influence of the roll grinding deviation and the stability of the deformation zone. Further, the horizontal and vertical direction coupling dynamic model of the work roll was established considering the structural clearance between the roll and mill frame. Then, the nonlinear dynamic equation was solved by the Runge–Kutta method. The simulation results show that the dynamic system presents the nonlinear vibration characteristics, which shows that the instability of the system is a slowly varying response process with the characteristics of self-excited vibration and forced vibration. Finally, the comparison results show the consistency between the simulation and the test.
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Received: 28 August 2021
Published: 25 January 2023
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| Cite this article: |
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Jin-xing Cui,Yan Peng,Jin Wang. Instability of roll nonlinear system with structural clearance in rolling process[J]. Journal of Iron and Steel Research International, 2023, 30(1): 112-125.
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2023, Vol. 30 
