| 摘要 |
<p>PURPOSE:To set suitably a roll gap length by carrying out correction of the roll gap length attending on a heat expansion of the rolls comparing the former corrected value to the correcting value of this time to increase and to decrease a grain of roll control to make a speed of the control of the correcting value up to the speed of heat expansion of the rolls. CONSTITUTION:A material 1 to be rolled is rolled through the rolls 2, and the roll gap length is detected by a position detecting device 3 for a rolling reduction to set. Information of the roll gap length, a rolling load and an outlet side plate thickness are sent to a control arithmetic unit 6. The roll gap correcting value is calculated by the unit 6 then this correcting value is compared to the former correcting value of the roll gap to select a gain. Using the selected gain, the roll gap correcting value is controlled.</p> |
