| 摘要 |
<p>PURPOSE:To prevent the lag of acceleration and to keep a capacity high by replacing a target strip thickness to a target value calculated from a measured value when a measured strip thickness on the outlet side of each intermediate stand is remarkably difference from a target sheet thickness set in advance. CONSTITUTION:The sheet thickness hi is found by hi=(hi-1)X(Vi-1)/(Vi) in accordance with sheet speed meters 31-34 to detect the strip speed Vi on the outlet side of an i-th stand of a tandem rolling mill, the strip thickness hi-1 on the outlet side of a (i-1)th stand, the strip speed Vi-1 on the outlet side of an (i-1)th stand, the strip speed Vi on the outlet side of a i-th stand, a difference DELTAhi from a target sheet thickness hio set in advance is found by hi=(hio)-(hi). Whether a control target sheet thickness hio be replaced by this difference DELTAhi to the target value calculated from a measured value at that time or not is decided. When the replacement is needed, the roll speed of each stand is controlled by a mass flow AGC so that the finally decided DELTAhi takes zero.</p> |
