| 摘要 |
<p>PURPOSE:To properly maintain the distribution of rolling loads at respective rolling stands, and to control the sheet thickness, by correcting the standard sheet thickness at one stand or at a stand locating on its upstream, when a detecting position of rolling at said one stand of a continuous rolling mill is out of a prescribed limited range. CONSTITUTION:The sheet thickness of a material P to be rolled ar respective exit sides of plural rolling stands R1-R3 of continuous rolling stands is detected X, and the sheet thickness is respectively controlled while controlling draft positions of respective stands R1-R3 basing on the differences between the detected sheet thickness and the standard thickness. In this case, initially set draft positions at respective stands R1-R3 and controlling ranges containing these set draft positions are fixed, and then, actual draft positions at respective stands R1-R3 are detected respectively by draft position detectors S1-S3. And when a detected draft position is out of said limited range, the standard sheet thickness at a rolling stand corresponding to said position or at a stand locating on the upstream of said stand, is corrected. After these result, the imbalance of rolling loads is compensated by simple constitution, and the quality of a rolled material is made highly accurate and stable.</p> |
