Abstract：By intermediate roll shifting ,the UCM cold mill can be adapt to strips with different width. In addition, the ability of work roll bending as well as the transverse rigidity of the UCM cold mill can be enhanced and is powerful to achieve excellent flatness. In order to improve the flatness of cold rolled strips, the initial position of intermediate roll was preset in accordance with the rolling process in revamp of the Ansteel 1250 6-H reversing UCM cold mill. The online adjustment of intermediate roll is calculated from the closed loop feedback flatness control system dependent on the actuator efficiency factors. For the purpose of avoiding roll abrasion, the relationship among roll force and shifting speed as well as thrust force was analyzed by theoretical calculation and experiments. In addition, shifting speed of intermediate roll was preset. The applications show that the models of intermediate roll control is capable in flatness control and is significant to obtain better flatness.
2010, Vol. 45 
