| 摘要 |
PURPOSE:To uniformize the temp. of hot sheet bar and to maintain a plate thickness accuracy by setting heating equipments to heat the rewound hot sheet bar to an edge part at first, then moving to the central part in the transverse direction with respect to the innermost diameter part. CONSTITUTION:The hot sheet bar 1 thermally equalized in a winding and rewinding stages of coil is heated by plural inductive heating coils 6a, 6b, etc., capable of elevating and movable to the transverse direction, then, the finish rolling is performed. In said heating method, at first, said heating coils 6a... are set on the edge part to heat. Then, based on a passing signal of the top end of the hot sheet bar 1 detected by an upstream detector 7, the clearances between the heating coils 6a... and the hot sheet bar 1 are narrowed to heat. After that, based on the passing signal of the top end of the innermost diameter part of the hot sheet bar 1 detected by the upstream detector 7, at least one of said heating coils 6a... is moved to the center part in the transverse direction of the hot sheet bar 1 to heat. By this method, the temp. drops of the edge part and rear end part are recovered effectively and the plate thickness is uniformized. |
