| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a temper rolling method which can reduce a length of a stretch rate defect portion by making a stretch rate of a following steel sheet reach a set stretch rate in a short period of time after a welding point of a precedent steel sheet and the following steel sheet passes through a mill. <P>SOLUTION: After the welding point 13 of the precedent steel sheet 11 and the following steel sheet 12 passes through a temper rolling mill 10, a pressure is applied by position control of a hydraulic cylinder 21 of the temper rolling mill 10, an oil pressure temporarily targeted for position control of the hydraulic cylinder 21 when the stretch rate of the following steel sheet 12 reaches the set stretch rate, and a predicted stretch rate which is predicted in next measurement are calculated. When the predicted stretch rate exceeds the set stretch rate, the temporary targeted oil pressure is set as a final target oil pressure; and when the oil pressure reaches the final target oil pressure, control of the temper rolling mill is switched to load control, and control of the stretch rate is started. <P>COPYRIGHT: (C)2012,JPO&INPIT |
