| 摘要 |
<p>PURPOSE:To keep tension constant at the time of correcting a gap constant by adding partial acceleration/deceleration torques of the inertial for variation of sheet speed on inlet/outlet sides based on the measured amount of deviation of thickness on the inlet side to the set value of tension. CONSTITUTION:In the reel tension control of a rolling mill in which feedforward automatic thickness control is executed, the amount of thickness deviation is measured with an inlet-side thickness gage 2 which is installed on the inlet side of the rolling mill 1, also the amount of variation of sheet speed on inlet/ outlet sides is calculated based on that amount of deviation of the thickness and stored and, when the thickness measuring point reaches the roll center of the rolling mill 1 and the correction of roll gas is executed, the stored acceleration/deceleration torques of the inertial part of the amount of variation of sheet on the inlet/outlet sides is added to the set value of tension. Thus, the meandering phenomenon of sheet at the time of changing draft is prevented and the quality is improved.</p> |
