Transactions of Materials and Heat Treatment

Title：Analysis on vibration behavior of cold rolling mill under elastic-plastic hysteretic deformation of workpiece

Authors： Peng Rongrong Tao Hongliang Zhou Chao

Unit： Nanchang Institute of Science & Technology Qinhuangdao Tobacco Machinery Co. Ltd. Hebei Agricultural University

KeyWords： cold rolling mill hysteretic nonlinear rolling force amplitude-frequency characteristic bifurcation vibration

ClassificationCode：O322；TH113

year,vol(issue):pagenumber：2020,45(5):146-152

Abstract：

By analyzing the influence of elastic-plastic deformation on workpiece in the cold rolling process and considering the relevant vibration parameters and process parameters, the rolling force expression with hysteretic characteristics was given, and the nonlinear dynamic model of cold rolling mill with elastic-plastic hysteretic deformation was established by combining the actual structure of rolling mill. For the structure parameters and process parameters of a cold rolling mill, the hysteresis curves of rolling force and displacement were given by simulation. The result shows that the vibration of rolling mill is suppressed by minimizing the area of hysteresis loops, and the influences of nonlinear damping, nonlinear stiffness and periodic disturb forces on the amplitude-frequency characteristics of system were studied to effectively reduce the vibration degree of cold rolling mill by appropriate values of the above parameters. Finally, the bifurcation behavior of hysteretic vibration system was analyzed. And it is found that the system changes between period doubling and chaotic motion with the change of disturb force to cause the resonance phenomenon of system.

Funds：

2018年度江西省教育厅科学技术研究项目(GJJ181061)；2019年度南昌工学院科技计划项目(NGKJ-19-01)

彭荣荣（1987-），男，硕士，讲师，E-mail：15294476178@163.com

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