Vertical-horizontal Vibration Research On Simplified Model Of Hot Continuous Rolling Mill During Dynamic Rolling Process

The abnormal vibration of hot continuous rolling mill during the rolling process seriously restricts the quality of the plate.Therefore,it is very important to express the vibration in different directions in the same model and to analyze the rolling mill vibration in continuous rolling.The main contents of this paper are as follows:(1)taking the 1580 mill of a certain steel plant as the research object,on the basis of the existing three-dimensional finite element model of the hot mill stand,the vertical stiffness between the corresponding parts was extracted by using the finite element software,and the specific steps were elaborated in detail,providing methods and data for the future study of the same type of model.(2)based on the finite element model of the frame,multiple finite element models including upper and lower beams,upper and lower working roller system and supporting roller system are established.The horizontal stiffness is extracted and the corresponding equivalent mass of each part is calculated by modal analysis.(3)based on the data obtained from the analysis of(1)and(2),two simplified models of vertical-horizontal coupling vibration are established.One is the model with horizontal stiffness and vertical stiffness,which is connected in series by mass element and spring element.Another model in which beam elements are added to simulate the frame.The modal analysis of the two models is carried out,and the corresponding natural frequency and mode diagram are extracted for comparative analysis.(4)on the basis of the mass spring unit model,a two-stand tandem mill model was established,and the dynamic rolling process of the hot tandem mill was simulated by adding rolling parts and their material properties.(5)the vibration of F1 and F2 mills under different rolling technologies is analyzed,and corresponding measures to suppress the vibration are given.