LEVELING CONTROL METHOD IN HOT ROLLING, LEVELING CONTROL DEVICE, HOT ROLLING FACILITY, AND METHOD FOR MANUFACTURING HOT-ROLLED STEEL STRIP

Japanese Patent JP2023177918

A

To provide a leveling control method in hot rolling which dissolves a meander factor before meandering appears, prevents meander of a rolled material, and can stabilize passing of the rolled material.SOLUTION: A leveling control method in hot rolling includes: a first leveling correction amount calculation step (step S3) of calculating a first leveling correction amount ΔLv1 in a rolling machine Fn that is an object to be controlled, on the basis of a width direction deviation ΔT of tension in a steady part of a rolled material S, while a tail end of the rolled material S passes through a rolling machine Fn-1 in the preceding stage after a tip of the rolled material S has passed through the rolling machine Fn that is the object to be controlled; and a second leveling correction amount calculation step (step S7) of calculating a second leveling correction amount ΔLv2 in the rolling machine Fn that is the object to be rolled, on the basis of a meander amount δi of the rolled material, and a differential load ΔP between the work side and the drive side of the rolling machine Fn that is the object to be controlled, while the tail end of the rolled material S passes through a meander amount detection device 15 after having passed through the rolling machine Fn-1 in the preceding stage.SELECTED DRAWING: Figure 2

YAMAGUCHI HIDEHITO
OGASAWARA TOMOYOSHI
GOTO HIROTO
KOMIYA KENTARO

JP2022090889A

December 14, 2023

June 03, 2022

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JFE STEEL CORP

B21B37/58; B21B37/68; B21B38/02

田中 秀▲てつ▼
Hajime Hirose
Toru Miyasaka
Tetsuya Mori

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