EP-4741075-A1 - CONTROL DEVICE FOR ROLLING DEVICE, ROLLING EQUIPMENT, AND METHOD FOR OPERATING ROLLING DEVICE

EP4741075A1EP 4741075 A1EP4741075 A1EP 4741075A1EP-4741075-A1

Abstract

A control apparatus for controlling a rolling mill apparatus including a pair of mill rolls for rolling a metal plate includes: a first strip-edge detection part configured to detect a strip-edge position, in a strip width direction, of the metal plate at a first position on an exit side of the pair of mill rolls in a conveyance direction of the metal plate; a second strip-edge detection part configured to detect a strip-edge position, in the strip width direction, of the metal plate at a second position downstream of the first position in the conveyance direction; and a leveling adjustment part configured to adjust leveling of the pair of mill rolls rolling the metal plate in a state where an exit-side tension of the metal plate is zero, on the basis of a first strip-edge position of the metal plate detected by the first strip-edge detection part and a second strip-edge position of the metal plate detected by the second strip-edge detection part.

Inventors

MATSUI, YOICHI
ODAWARA, Yuta

Assignees

Primetals Technologies Japan, Ltd.

Dates

Publication Date: 20260513
Application Date: 20230922

Claims (11)

A control apparatus for controlling a rolling mill apparatus including a pair of mill rolls for rolling a metal plate, the control apparatus comprising: a first strip-edge detection part configured to detect a strip-edge position, in a strip width direction, of the metal plate at a first position on an exit side of the pair of mill rolls in a conveyance direction of the metal plate; a second strip-edge detection part configured to detect a strip-edge position, in the strip width direction, of the metal plate at a second position downstream of the first position in the conveyance direction; and a leveling adjustment part configured to adjust leveling of the pair of mill rolls rolling the metal plate in a state where an exit-side tension of the metal plate is zero, on the basis of a first strip-edge position of the metal plate detected by the first strip-edge detection part and a second strip-edge position of the metal plate detected by the second strip-edge detection part.
The control apparatus for a rolling mill apparatus according to claim 1, wherein the leveling adjustment part is configured to adjust the leveling such that a difference between the first strip-edge position and the second strip-edge position falls within a predetermined range.
The control apparatus for a rolling mill apparatus according to claim 1 or 2, wherein the leveling adjustment part is configured to adjust the leveling such that a difference between the first strip-edge position and the second strip-edge position becomes smaller.
The control apparatus for a rolling mill apparatus according to claim 1, wherein the leveling adjustment part is configured to adjust the leveling using an offset amount being a difference between a strip-edge position of the metal plate at a rewinder for rewinding the metal plate rolled by the pair of mill rolls and a target strip-edge position.
The control apparatus for a rolling mill apparatus according to claim 4, wherein the leveling adjustment part is configured to adjust the leveling on the basis of correlation between a difference between the first strip-edge position and the second strip-edge position and the offset amount.
The control apparatus for a rolling mill apparatus according to claim 5, comprising: a target value acquisition part configured to acquire, as a target value, the difference between the first strip-edge position and the second strip-edge position at which the offset amount becomes a predetermined value, on the basis of the correlation, wherein the leveling adjustment part is configured to adjust the leveling so that the difference between the first strip-edge position and the second strip-edge position approaches the target value.
The control apparatus for a rolling mill apparatus according to any one of claims 4 to 6, comprising: an offset amount detection part for detecting the offset amount; a data acquisition part configured to acquire, over a plurality of times, each of a difference between the first strip-edge position and the second strip-edge position and the offset amount corresponding to the difference; and a correlation acquisition part configured to acquire the correlation on the basis of a plurality of differences and a plurality of offset amounts acquired by the data acquisition part.
The control apparatus for a rolling mill apparatus according to claim 7, wherein the data acquisition part is configured to acquire the difference and the offset amount repetitively, and wherein the correlation acquisition part is configured to reacquire the correlation each time the data acquisition part acquires the difference and the offset amount.
The control apparatus for a rolling mill apparatus according to claim 7, wherein the correlation acquisition part is configured to acquire the correlation using newer ones selected from the plurality of differences and the plurality of offset amounts acquired by the data acquisition part.
A rolling mill facility, comprising: a rolling mill apparatus including a pair of mill rolls for rolling a metal plate; and the control apparatus according to claim 1 or 2 configured to control the rolling mill apparatus.
A method for operating a rolling mill apparatus including a pair of mill rolls for rolling a metal plate, the method comprising: a first strip-edge detection step of detecting a strip-edge position, in a strip width direction, of the metal plate at a first position on an exit side of the pair of mill rolls in a conveyance direction of the metal plate; a second strip-edge detection step of detecting a strip-edge position, in the strip width direction, of the metal plate at a second position downstream of the first position in the conveyance direction; and a step of adjusting leveling of the pair of mill rolls rolling the metal plate in a state where an exit-side tension of the metal plate is zero, on the basis of a first strip-edge position of the metal plate detected in the first strip-edge detection step and a second strip-edge position of the metal plate detected in the second strip-edge detection step.

Description

TECHNICAL FIELD The present disclosure relates to a control apparatus for a rolling mill apparatus, a rolling mill facility, and a method for operating a rolling mill apparatus. BACKGROUND ART In rolling of a metal plate using a rolling mill including a pair of mill rolls, the metal plate may be rolled in a strip head-end tensionless state where no tension is applied to the rolling mill exit side of the metal plate before the head end portion of the metal plate is rewound by a rewinder in order to improve the yield (strip head-end tensionless rolling). Patent Document 1 discloses a rolling mill facility including a strip-edge detection part disposed on each of the entry side and the exit side of the pair of mill rolls (rolling mills). In the rolling mill facility, it is determined whether the metal plate is parallel to the conveyance direction (pass line) on the basis of the strip-edge position in the strip width direction at the entry side and the exit side of the mill roll detected by a strip-edge detection part, and the strip head-end tensionless rolling is started if the metal plate is substantially parallel to the conveyance direction. Furthermore, after rolling of the metal plate is started, the leveling is adjusted on the basis of the strip-edge position in the strip width direction on the exit side of the rolling mill, and inclination of the metal plate with respect to the conveyance direction is suppressed. Accordingly, the head end of the metal plate is guided to the rewinder while suppressing inclination of the metal plate. Citation List Patent Literature Patent Document 1: JP7150994B SUMMARY Problems to be Solved However, in the rolling mill facility of Patent Document 1, the strip head-end tensionless rolling is started after the orientation of the metal plate is adjusted to be substantially parallel to the conveyance direction, and thus it requires time for adjusting orientation of the metal plate before rolling is started. Thus, there is room for improvement in terms of production efficiency. In view of the above, an object of at least one embodiment of the present invention is to provide a control apparatus for a rolling mill apparatus, a rolling mill facility, and a method for operating a rolling mill apparatus capable of quickly starting rolling in a state where the exit-side tension of the metal plate is zero (strip head-end tensionless rolling). Solution to the Problems A control apparatus for controlling a rolling mill apparatus according to at least one embodiment of the present invention is a control apparatus for controlling a rolling mill apparatus including a pair of mill rolls for rolling a metal plate, and includes: a first strip-edge detection part configured to detect a strip-edge position, in a strip width direction, of the metal plate at a first position on an exit side of the pair of mill rolls in a conveyance direction of the metal plate; a second strip-edge detection part configured to detect a strip-edge position, in the strip width direction, of the metal plate at a second position downstream of the first position in the conveyance direction; and a leveling adjustment part configured to adjust leveling of the pair of mill rolls rolling the metal plate in a state where an exit-side tension of the metal plate is zero, on the basis of a first strip-edge position of the metal plate detected by the first strip-edge detection part and a second strip-edge position of the metal plate detected by the second strip-edge detection part. Furthermore, a rolling mill facility according to at least one embodiment of the present invention includes: a rolling mill apparatus including a pair of mill rolls for rolling a metal plate; and the control apparatus described above configured to control the rolling mill apparatus. Furthermore, a method for operating a rolling mill apparatus according to at least one embodiment of the present invention is a method for operating a rolling mill apparatus including a pair of mill rolls for rolling a metal plate, and the method includes: a first strip-edge detection step of detecting a strip-edge position, in a strip width direction, of the metal plate at a first position on an exit side of the pair of mill rolls in a conveyance direction of the metal plate; a second strip-edge detection step of detecting a strip-edge position, in the strip width direction, of the metal plate at a second position downstream of the first position in the conveyance direction; and a step of adjusting leveling of the pair of mill rolls rolling the metal plate in a state where an exit-side tension of the metal plate is zero, on the basis of a first strip-edge position of the metal plate detected in the first strip-edge detection step and a second strip-edge position of the metal plate detected in the second strip-edge detection step. Advantageous Effects According to at least one embodiment of the present invention, it is possible to provide a control apparatus for a rolling