Patent ID: 11872613
Assignee: NIPPON STEEL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 11:
12. The method for setting a rolling mill according to claim 10, wherein:
the rolling mill is a four-high rolling mill,
a plurality of rolls, including one roll of the pair of work rolls and one roll of the pair of backup rolls, provided on an upper side in the vertical direction with respect to the workpiece are adopted as an upper roll assembly, and
a plurality of rolls, including an other roll of the pair of work rolls and an other roll of the pair of backup rolls, provided on a lower side in the vertical direction with respect to the workpiece are adopted as a lower roll assembly;
the method including performing:
a first adjustment in which a roll gap between the work rolls is set in an open state, and with respect to each of the upper roll assembly and the lower roll assembly, positions of the roll chocks of the work roll and the roll chocks of the backup roll are adjusted, and
after the first adjustment ends, a second adjustment in which the work rolls are set in a kiss roll state, and either one of the upper roll assembly and the lower roll assembly is adopted as a reference roll assembly including the reference roll, and adjust the roll assembly opposite to the reference roll is adjusted by controlling the roll chocks simultaneously and in a same direction while maintaining relative positions between the roll chocks; and
in the first adjustment, with respect to each of the upper roll assembly and the lower roll assembly, in a state in which a bending force is applied to the roll chocks of the work rolls,
the roll chocks of the work roll on the reference roll side and either one of the roll chocks of the work roll and the roll chocks of the backup roll of the roll assembly on the opposite side to the reference roll are moved in the rolling direction of the workpiece to adjust positions of the roll chocks so that the rolling direction force difference measured falls within an allowable range.