Instability of roll nonlinear system with structural clearance in rolling process  

作　　者：Jin-xing Cui Yan Peng Jin Wang 

机构地区：[1]National Engineering Research Center for Equipment and Technology of Cold Rolled Strip,School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,Hebei,China

出　　处：《Journal of Iron and Steel Research International》2023年第1期112-125,共14页

基　　金：supportedby Regional Joint Development Fund (No.U20A20289);Project of Leading Local Science and Technology Development Fund (No.206Z1601G);Innovation ResearchGroupProjectof Hebei Province (No.E2021203011);Innovation Funding Project for Graduate Students in Hebei Province (No.CXZZBS2020054).

摘　　要：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.

关 键 词：Roll grinding accuracy Dynamic rolling force Structural clearance Collision Rolling mill instability 

分 类 号：TG333[金属学及工艺—金属压力加工]