METHOD FOR CONTROLLING SHAPE OF ROLLING MATERIAL BY MULTISTAND ROLLING MILL

摘要

PURPOSE:To hold with good accuracy the shape of a rolling material by operating the shape control device of the final stand by the operated shape controlling quantity and the estimated value of the variation in plate shapes due to the hardness variation. CONSTITUTION:A material transfer process 7 is performed with the thickness gate signal and the rolling speed by the rolling speedometer 6 of a stand 1 after processing 4, 5 the signal of a thickness gate 2 and the signal of a load gate 3 respectively. The hardness variation of a rolling material S is then calculated by outputting to a material hardness arithmetic unit 8 the output signal and-load signal thereof. The rolling material S from the stand 1 upto the final stand 11 is tracked with the material transfer processing 10 of the signal of the arithmetic unit 8 and roll speed 9 and further by the output signal thereof and a rolling material size inputting signal 12 the shape variation is calculated with the estimation 13. The control quantity of each device of the shape control device 21 composed of a work roll bending 19 and intermediate roll shift 20 is further calculated by inputting to a control output arithmetic unit 18 the shape variation estimated value and the feedback control quantity by a shape detector 14 and the shape control is performed by outputting to a control device 21.