| 摘要 |
<p>PURPOSE:To execute set-up control so that a strip metal 4 with one-side crown can be rolled into a prescribed sectional shape from the start of rolling. CONSTITUTION:Controlled variables dW1, dW2 of two optional control terms of a group of asymmetric shape control terms, that consist of differences dWb, dIb, between bending forces of the work rolls 1 and intermediate rolls 2 on the operation side and drive side of a four or more high mill, difference dP between rolling-down forces of back-up rolls 3 and difference ddelta between the shift positions of the upper and lower intermediate rolls, are obtained from control formulas. Three formulas are led and properly used by 0, 1 or 2 of the number of control terms that are used for asymmetric shape control besides dW1, dW2 of the group of asymmetric shape control terms. In the case of 0, it is formula I and conditions are as follows: (a)-(h): coefficient that is determined by rolling conditions, epsilone0, epsilonq0: the target value of the difference of elongation percentage between mutual side end parts and mutual quarter parts of sheet, He, Hq: difference of thickness between mutual side end parts and quarter parts of sheet on the inlet side of rolling mill.</p> |
