| 摘要 |
<p>PURPOSE: To stably manufacture a steel sheet with a prescribed taper gradient by arithmetically correcting the target gain of the thickness on the exit side of a rolling mill based on a mill rigidity, plastic coefficient of a material and the gain of a thickness control system. CONSTITUTION: The change of target taper thickness is calculated with an apparatus 5 for setting change in the target taper thickness by means of an equation I, in whichΔhT*; change in target taper thickness, M; mill rigidity coefficient, Q; plastic coefficient of material, KA; scale factor, andΔhT; target taper quantity. The change in thickness is calculated by a detector 7 for change in thickness on the exit side. In an equation II,Δhg ; change in thickness on the exit side,ΔS; roll gap change, andΔP; change in rolling reaction. From a thickness deviation on the exit side which is a difference between the change in target taper thicknessΔhT* and the change in thickness on the exit sideΔhg , a roll gap control quantity is calculated by the thickness control system 8 on the exit side; and the roll gap is controlled by giving the roll gap control quantity as a reference to the roll gap control system.</p> |
