| 摘要 |
<p>PURPOSE:To provide a plate thickness control method of a hot rolling mill which can approach to an objective plate thickness and restrain its variation. CONSTITUTION:When the plate thickness is set to an objective thickness by controlling rolling reduction so that a plate thickness measured by a thickness meter provided on the outlet side of a hot rolling mill is fed back to remove the deviation from the objective plate thickness, a roll gap is corrected by feed back control in accordance with an average thickness of the tip part of a stock to be rolled through an initial rolling-down corrective control system 9. Then, PI compensation is made according to a measured thickness fed back by a corrective rolling-down corrective control system 10 at every sampling time of the thickness meter to correct the roll gap. Consequently, the plate thickness on the outlet side can be approached quickly to the objective thickness and its variation be restrained.</p> |
