| 摘要 |
<p>PURPOSE: To prevent loosening caused by the cooling of a hot rolled coil by adjusting the winding temperature of a rolled stock by a hot rolled coil according to the outside diameter size of the hot rolled coil so that the temperature of the outside part of the hot rolled coil is higher than that of an inside part. CONSTITUTION: The outside diameter dimension of a hot rolled coil 18, which has been found by a coil diameter calculator 30, is inputted in a target temperature setting instrument 22. In the target temperature setting instrument 22, the outside diameter size of the hot rolled coil 18 is compared with the threshold of the preset outside diameter size of the coil. When the outside diameter size of the hot rolled coil 18 exceeds a set diameter, the target value of the winding temperature of a rolled stock 14, which is set by the target temperature setting instrument 22, is changed so that it becomes higher than an initial set value. Consequently, the occurrence of a flaw, etc., in the rolled stock, which are caused by tightening, can be avoided.</p> |
