CROWN CONTROLLING METHOD FOR MULTI-STAGE ROLLING MILL

摘要

PURPOSE:To make sure shape control and to improve the yield of a rolling material and productivity by controlling the extent of the movement of a rolling- down device until rolling load attains a target value in accordance with the signal from a load detecting means. CONSTITUTION:The shape of a material 18 to be rolled is detected by a shape detecting means 21. The control signal is inputted to a shape control device 22 in accordance with the detected shape to stop the sheet thickness control. The target rolling load is stored into a rolling load memory device 29 in this stage. The shape control device 22 detects the rolling load by a load detector 23 and makes the shape control with the constant rolling force under the target rolling load while operating a wedge driving means 14 for crown adjustment. The shape control is surely and efficiently executed by the above-mentioned method.