| 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, tension loading devices 13, 16 for loading tension onto a rolled material on an inlet side and an outlet side of the mill, a tension control device 20 for controlling tension loaded onto the rolled material by the tension loading devices, 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 been already rolled by the mill. During rolling of the rolled material, the tension control device changes tension on the basis of the rolling length detected or calculated by the rolling length estimation device and according to a target thickness pattern relevant to a pattern of a thickness of the differential thickness steel plate to be manufactured by the manufacturing apparatus in the rolling direction. |
