| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain fine accuracy of thickness from the top end part. <P>SOLUTION: By obtaining memory pressure by performing filtering process to the actual value of the pressure of a hydraulic cylinder when the reduction position of the hydraulic cylinder is in a releasing direction on the basis of the actual value of the pressure and the reduction position of the hydraulic cylinder just before a rolling mill is stopped after the final rolling point of the last pass is rolled; calculating the gage meter thickness at the final rolling point of the last pass on the basis of the memory pressure the reduction position of the hydraulic cylinder, a detected value of the thickness on the outlet side, a detected value of thickness on the inlet side when the final rolling point is rolled; calculating the amount of correction to calculate the pressure reference in the starting point of the rolling of the next pass by taking rolling conditions at the moment when the memory pressure is detected into consideration on the basis of the gage meter thickness and the detected value of the thickness on the inlet side; and calculating the pressure reference on the basis of the memory pressure by taking the amount of correction; the rolling of the next pass is started by taking the pressure of the hydraulic cylinder as a prescribed pressure reference on the basis of the pressure reference. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
