Analysis of coupling mechanism between roll system crossing and liner wear of hot strip mill

Non-design roll system crossing seriously affects the plate shape and rolling mill performance.The problem of roll system crossing caused by liner wear was studied.The finite element model of rolling mill was established to analyze the relationship between roll system crossing and liner wear.The wear of liner was measured by laser tracker.The range of roll system crossing angle was calculated by considering the amount of stand clearance obtained by numerical simulation.The wear surface morphology of liner was observed and the wear mechanism was analyzed.The liner wear experiment was carried out to analyze the wear amount of the liner.Finally,based on the Archard wear theory,the prediction model of the cross angle of the roll system and the wear amount of the liner was established.Because there are more uncertain factors in the field production,the prediction model cannot be considered one by one.Therefore,the predicted value is smaller than the actual wear value,but it still has great reference.