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《Journal of Vibration and Shock》 2015-16
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Influence of rolling lubrication on the self-excited vibration of rolling mill main drive system

CHEN Cheng;LI You-rong;The key laboratory for metallurgical equipment and control of ministry of education,Wuhan University of Science and Technology;  
In order to research the mechanism of self-excited vibration in rolling process of F2 rolling mill production in a hot strip mill set and to eliminate the self-excited vibration of rolling mill,the main drive system of the rolling mill was simplified into two single degree of freedom systems with equal natural frequency,and the nonlinear dynamical equations of a twist vibration model of the main drive system were established. The progressive method was used to solve the nonlinear dynamical equations. The results of simulation analysis draw the following conclusions: due to the unstable rolling lubrication, the friction in rolling deformation zone declines and causes the negative damping phenomenon,resulting in the self-excited vibration of the mill. Through the field test and theoretical analysis,it is found:reasonable changes of the dynamic viscosity of rolling lubricating liquid and rolling speed can avoid the appearance of negative damping and eliminate the self-excited vibration of the mill.
【Fund】: 国家自然科学基金资助项目(51105284)
【CateGory Index】: TG333
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