| 摘要 |
<p>PURPOSE:To accelerate the response for controlling the sheet thickness and to obtain the sheet thickness of good accuracy by setting the tension controller at the inlet side of the rolling mill or both inlet and outlet sides, quickly suppressing the tension change, removing the inlet side r late disturbance by measuring with the inlet side thickness meter, and also suppressing the influence of the eccentricity, etc., of the roll by changing the mill-constant. CONSTITUTION:The tension controllers 33, 34 measure the tension change of the material to be rolled 30, move the presser roll 35, control the tension change caused by the roll gap change. The inlet side sheet thickness change is measured with the thickness meter 22, the feeding velocity V of the material to be rolled 30 is measured with the speed meter 50, the signal of the roll gap changing quantity is outputted to the adder 13 from the roll gap changing quantity caluculater 51, the roll gap of the work rolls 3, 4 is adjusted,and so the inlet side sheet thickness variation is removed. Based on the load cell 1 or the signal of the outlet side thickness meter 25, the mill- constant to remove the influence of the ingredient of disturbance caused by the rolling mill 32 itself of the roll eccentricity, etc., against the outlet side sheet thickness if obtained with the mill-constant operator 52, the correcting gain is obtained with the setting unit 53 based on the signal of mill-constant, and the correcting gain of the counter 16 is changed with the correcting gain signal.</p> |
