| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide technology capable of improving accuracy of the control of the hot finishing temperature during finish rolling. <P>SOLUTION: A target cooling amount that makes plate temperature at a finish rolling machine outlet side to be target temperature at the outlet side of finishing roll is calculated using temperature model that is preliminarily set from inlet side actual temperature that is temperature of a plate at a finish rolling machine inlet side, and a cooling amount at a cooling device is controlled to the target cooling amount. The temperature drop amount of the plate from the finish rolling machine inlet side to the finish rolling machine outlet side is calculated as a calculated temperature drop amount when cooling is executed with the target cooling amount using the inlet side temperature and the temperature model. The actual temperature drop amount of the plate from the finish rolling machine inlet side to the finish rolling machine outlet side is calculated as an actual temperature drop amount from the inlet side actual temperature to the finish rolling machine outlet side. In addition, the ratio of the actual temperature drop amount to the calculated temperature drop amount is obtained as a learned value and the target cooling amount is corrected by the learned value. <P>COPYRIGHT: (C)2013,JPO&INPIT |
