| 摘要 |
<p>PURPOSE:To cool shape steel uniformly in the transfer direction by calculate the target value of an amount of cooling liquid, controlling the amount of cooling liquid to be sprayed to a flange and feedback controlling the target value according to the measured value of an amount of sprayed cooled liquid to cool the flange. CONSTITUTION:Before begining to cool a rolled shape steel, a web temperature Tw and a flange temperature Tf are measured, a necessary amount of cooling water per unit length of material to be cooled is calculated according to the flange width size B of the material to be cooled, further, the amount Q of cooling water is required, first, by multiplying a transfer speed V of the material to be cooled. Then, when the transfer speed of the rolled shape steel is changed, an amount Q of cooling water depending on an elapsed time(t) from a time beginning to change the direction is required to decide an opening of a flow regulating valve. When the flow rate of the cooling liquid is regulated by the opening of the flow regulating valve, the flow control is conducted to add a deviation of an opening indicated value as a disturbance factor of the feedback control series and a feedback control to the opening target value is conducted.</p> |
