MEANDERING MOTION CONTROLLING METHOD AND CONTROLLER FOR HOT CONTINUOUS FINISHING MILL

摘要

PURPOSE:To reduce the tapered off phenomenon by executing the the drawing- down leveling control so that the difference of the left and right tensile strengthes of the driving side and the working side become to the target value among each stands prior from the prescribed time and locking the control on the tapered off meadering control of the hot continuous strip rolling. CONSTITUTION:At the time that the tail part of the rolled stock exists between the stand of two stages before and the before stage of this stand, the rolling reduction leveling control reduction leveling control is executed so that the difference of the tensile strengthes of the driving side and the working side of the rolled stock becomes the target value between each stand, and that the tail part of the stock being rolled 1 is run out from the before stand. In such a way, the lock on control of the constant loading difference of rolling does not need the leveling mechanism of extremely high responsiveness at the time of the running out from the stand, so the high accuracy can be secured and the tapered off phenomenon is reduced.