| 摘要 |
<p>PROBLEM TO BE SOLVED: To remove both defects in shape of local elongation and defect in shape of general elongation more stably and more effectively with a comparatively simple control system. SOLUTION: With a local elongation arithmetic part 12, the manipulated variables of coolant of coolant jetting nozzles 8 which are respectively provided in the width direction of a rolled stock 1 are respectively calculated from the output of a shape detector 6 and controlled. With a general elongation arithmetic part 13, one pattern of several patterns of the manipulated variables of a coolant which are preliminarily decided is selected and the control in which the manipulated variables are continued for a specified time is executed. With a control operation selecting part 15, the control with either of the local elongation arithmetic part 12 and the general elongation arithmetic part 13 is selected. The defect in shape of the local elongation is dissolved with the local elongation arithmetic part 12 and wide regional defect of wave except this defect is effectively dissolved with the general elongation arithmetic part 13.</p> |
