| 摘要 |
<p>PURPOSE:To evade the increase of plate thickness at the time of decelerating the rolling mill and to maintain the product quality by providing a mean to stiffening the control constant of the mill constant control to a mill constant control arithmetic section of the plate thickness control device. CONSTITUTION:On the correcting value arithmetic mean 16 of the mill constant control arithmetic section 23, in addition to the rolling pressure deflection DELTAP, a mill constant control constant Cnm at the time of normal operation or a mill constant control constant Csd at the time of deceleration is selectively introduced, through switching contact points 20. Further, on a reference gap arithmetic means 12, a detected roll gap Sf is introduced through a contact point 21 for preventing the rapid change of the reference roll gap. The contact point 20 is switched during deceleration the rolling mill, the mill constant control constant Csd(Csd>0) is introduced to perform the stiffened mill constant control. After the deceleration is finished, the contact point 20 is switched again to the mill constant control constant Cnm to return to the former control.</p> |
