| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing apparatus for a differential thickness steel plate in which a manufacturing speed can be increased while maintaining a low equipment cost.SOLUTION: A manufacturing apparatus 1 for a differential thickness steel plate comprises a mill 10 having a rolling device 19, a heater 14 for heating a rolled material S approaching the mill, a heating rate control device 16 for controlling a thermal dose in the heater, and a rolling length estimation device for detecting or calculating a rolling length relevant to a length of a part of the rolled material in a rolling direction which has already been rolled by the mill. During rolling of the rolled material, the heating rate control device changes the thermal dose on the basis of the rolling length detected by or calculated by the rolling length estimation device and according to a target thickness pattern relevant to distribution of thicknesses of the differential thickness steel plate to be manufactured by the manufacturing apparatus in the rolling direction. |
