| 摘要 |
<p>PURPOSE:To realize a rolling flow which is smooth and free from material breakage by treating separately the changing portion of forward slip going with rolling reduction, which is disregarded in the past, and making correctingly the portions corresponding to the casual relations at respective interstands cooperated with each other. CONSTITUTION:When a sheet-thickness changing point arrives at the (i)th stand (expressed by Si hereafter); its draft position is changed at the Si to a value corresponding to a prescribed sheet-thickness change, and its roll speed is also corrected by its changing portion of forward slip in cooperation with the change of draft position. Simultaneously, at the Si-1 stand or at respective stands on the upstream upper than the Si-1; those roll speeds are corrected by the changing portion corresponding to the sheet-thickness change at the Si in cooperation with those draft positions. Further, the draft position of the Si-1 is corrected at the Si-1 to conform the downstream tension of Si-1 to the prescribed tension of upstream pass-schedule, and also its roll speed is corrected by its changing portion of forward slip in cooperation with the correction of its draft position. In this way, the changes of sheet thickness and tension from the pass schedule of downstream to that of upstream are performed extremely smoothly, and the changes of draft position and roll speed are made to cooperate with each other while keeping perfectly their casual relation.</p> |
