| 摘要 |
<p>PURPOSE:To prevent a shortage of plate length and to improve yield, by determining a target plate length of the next pass basing on the measured length and gauge-meter plate thickness of a plate after rolling of each pass, in automatical controlling of the plate thickness using a gauge meter system. CONSTITUTION:In calculating a rolling schedule during operation, the final pass is put to be 0 pass, a pass prior to the final one by (i) passes is put to be (i) pass, and respective target plate thicknesses are put to be GM(0), and GM(i), and then the target plate length L(0) of the central part in the width direction at the 0 pass is given by the equationI. Where, beta1 and beta2 are the lengths in which both the error between the length at the slab designing and the actual length, and the error between the target and actual lengths reflect respectively, and all the lengths and thicknesses of the plate are the dimensions in hot state. Next, the target plate length L(i) at every pass is obtained from L(0) and GM(i) by the equation II. Further, in each pass during rolling, e.g. the plate length l(i) of the central part in the width direction of a plate 10 after passing the (i)th pass is measured by a highly accurate length meter, and the plate thickness tc of the central part is calculated by the gauge meter system, and then the average values in the longitudinal directions of the plate are put to be the gaugemeter plate- thickness gm(i) of the (i)th pass. Next, the target plate thickness GAIM(i-1) of the next pass (i-l) is calculated by the equation III.</p> |
