| 摘要 |
<p>PURPOSE:To eliminate dead time by rolling an object of rolling between rolls and setting zero of the indication of screw down position of a rolling mill based on the operation data. CONSTITUTION:A steel sheet as the object of rolling is fed between both rolls and simultaneously rolling is started. When rolling load reaches a prescribed value by usual feedback control, an estimated drawing down position is determined by a prescribed arithmetic expression based on the thickness, rolling load, kind of sheet, etc., and a value corresponding to it is set on an indicator. Consequently, at the time of roll change or the like of the rolling mill, zero point adjustment of indication of screw down position of roll can be executed without generating scratch on the roll and also without accompanying dead time so much.</p> |
