Analysis of thrust force in a work roll shifting mill

In a work roll shifting mill, thrust force can cause troubles in the operation of the mill. Based on theoretical analysis and practical application, the mechanics and control approach of the thrust force have been analyzed. Research shows that the relative displacement vector of friction pair is a criterion for controlling the thrust force during work roll shifting. This friction pair is caused by contact between the work roll and the backup roll in the deformation zone. The thrust force is determined by relative displacement vector, and it can be controlled effectively through decreasing the relative displacement vector. Using vector analysis, the effects of the work roll shifting and crossing on mechanics and practical application are also discussed. The experiment shown in this paper verifies that the work roll crossing can decrease the thrust force which is caused by its shifting during rolling.