METHOD FOR CONTROLLING SHAPE OF SHEET IN ROLLING MILL

摘要

PURPOSE:To execute highly-stable and highly-responsive control by controlling the shape of a rolled sheet by operating each adjusting device while compensating the delayed response in each adjusting device. CONSTITUTION:The variation of rolling load and rolling difference load is detected with load cells 8, 9 and the tension distribution in the breadthwise direction of the rolled sheet 2 is detected with a sensor roll 6 for detecting tension distribution. From which the distortion distribution of sheet is computed and shape parameters used for expressing the defect of shape are calculated. While compensating the delayed detection of shape parameter by these parameters and the variable values of rolling load and rolling difference load, disturbance values to be corrected are estimated in each adjusting device. While compensating the delayed response in each adjusting device based on these estimated values, the control of the shape of the rolled sheet 2 in a rolling mill 4 is executed by operating each adjusting device. In this way, the high- accuracy control of the shape of sheet can be attained.