A control device (3b) for a roll stand (1). During rolling of a metal strip (2) in the roll stand (1), the device receives measurement data (M) for a lateral position (y) of the metal strip (2) on the inlet side and/or outlet side of the roll stand (1). Taking into account parameters (P) of the stand regulator (3a) on the basis of the deviation in the lateral position (y) from a target position (y*), a stand regulator (3a) of the control device (3b) determines a tilt value (δs) for the roll stand (1) and controls the roll stand (1) accordingly. The control device (3b) determines at least one variable (V1, V2, Q1, Q2) from which it is derived, for both strip edges (7, 8) of the metal strip (2), whether the metal strip (2) forms an undulation (9) in the region of the particular strip edge (7, 8). As soon as the metal strip (2) forms an undulation (9) in the region of one of the strip edges (7, 8), the control device (3b) varies at least one of the parameters (P) of the stand regulator (3a), such that the stand regulator (3a) determines the tilt value (δs), starting from the variation in the at least one parameter (P), and taking into account the changed parameter (P).

A meandering control device and hot rolling equipment suppress a meandering amount of a hot-rolled steel strip. A roll opening degree difference between an operation side and a driving side in an i-th rolling machine computed in a leveling control computation step (step S3) in the meandering control method, satisfies the roll opening degree difference between the operation side and the driving side in the i-th rolling machine (Fi) by Expressions (1), (2), and (3) in a control section j, in a case where the control section j is set when a tail end portion (Sa) of a traveling hot-rolled steel strip (10) is present between a j-th (j≤i−1) rolling machine (Fj) and a (j+1)th rolling machine (Fj+1) counting from a rolling machine (F1) installed on a most upstream side.

A meandering control device and hot rolling equipment suppress a meandering amount of a hot-rolled steel strip. A roll opening degree difference between an operation side and a driving side in an i-th rolling machine computed in a leveling control computation step (step S3) in the meandering control method, satisfies the roll opening degree difference between the operation side and the driving side in the i-th rolling machine (Fi) by Expressions (1), (2), and (3) in a control section j, in a case where the control section j is set when a tail end portion (Sa) of a traveling hot-rolled steel strip (10) is present between a j-th (j≤i−1) rolling machine (Fj) and a (j+1)th rolling machine (Fj+1) counting from a rolling machine (F1) installed on a most upstream side.

Slabs pass through a furnace in a conveying direction, are heated to rolling temperature, and are rolled in at least one roller stand. Determining device receives information showing the regions occupied by the slabs relative to one another when passing through the furnace in at least one direction orthogonal to the conveying direction, and determines, for at least one rolling pass of the respective slab, an adjustment of the roller stand performing this rolling pass without prior determination of a respective temperature distribution of a respective slab or without utilization of a determined temperature of a respective slab. The determining device takes into account the region occupied by the respective preceding and/or following slab, seen in the conveying direction, relative to the respective slab, and supplies the respective determined adjustment of the roller stand to a control device, which controls the roller stand when the respective slab is being rolled.

A meandering control method for steel strip includes: an imaging step of imaging the surface of a traveling steel strip using a line sensor camera installed between adjacent rolling mills; a meandering amount calculation step of calculating the meandering amount of the steel strip by detecting the positions of both end portions in the width direction of the steel strip from a one-dimensional brightness distribution based on the captured image; and a leveling control arithmetic operation step of arithmetically operating a roll opening difference between the operation and drive sides of the rolling mill located on the immediately downstream side of the line sensor camera based on the calculated meandering amount. The imaging is performed in a period of 5 msec or less.

A meandering control method for steel strip includes: an imaging step of imaging the surface of a traveling steel strip using a line sensor camera installed between adjacent rolling mills; a meandering amount calculation step of calculating the meandering amount of the steel strip by detecting the positions of both end portions in the width direction of the steel strip from a one-dimensional brightness distribution based on the captured image; and a leveling control arithmetic operation step of arithmetically operating a roll opening difference between the operation and drive sides of the rolling mill located on the immediately downstream side of the line sensor camera based on the calculated meandering amount. The imaging is performed in a period of 5 msec or less.

A meandering amount detection method for a metal strip that detects a meandering amount of a metal strip traveling in a state of being overlapped in a plurality of stages at intervals, the meandering amount detection method includes: measuring a distance from a mounting position of a distance meter in a direction intersecting a width direction of a metal strip, using a plurality of distance meters provided side by side in the width direction of the metal strip on at least one side in a width direction of the metal strips overlapped in the plurality of stages; and detecting a stage of a metal strip in which meandering occurs and a meandering amount, using the mounting position of a distance meter and the measurement value.

A meandering amount detection method for a metal strip that detects a meandering amount of a metal strip traveling in a state of being overlapped in a plurality of stages at intervals, the meandering amount detection method includes: measuring a distance from a mounting position of a distance meter in a direction intersecting a width direction of a metal strip, using a plurality of distance meters provided side by side in the width direction of the metal strip on at least one side in a width direction of the metal strips overlapped in the plurality of stages; and detecting a stage of a metal strip in which meandering occurs and a meandering amount, using the mounting position of a distance meter and the measurement value.

A meandering amount detection method for a metal strip traveling in a state of being overlapped in a plurality of stages, includes: calculating an end portion position in a width direction of a metal strip in each stage using an angle formed by a reference direction, which is any direction determined from a reference point, and a direction connecting the reference point and an end portion position in a width direction of a metal strip in each stage, a distance between the reference point and an end portion position in a width direction of a metal strip in each stage, and a distance between a straight line including a width direction of the metal strip and the reference point; and calculating a meandering amount of a metal strip in each stage based on the calculated end portion position in the width direction of the metal strip in each stage.

A meandering amount detection method for a metal strip traveling in a state of being overlapped in a plurality of stages, includes: calculating an end portion position in a width direction of a metal strip in each stage using an angle formed by a reference direction, which is any direction determined from a reference point, and a direction connecting the reference point and an end portion position in a width direction of a metal strip in each stage, a distance between the reference point and an end portion position in a width direction of a metal strip in each stage, and a distance between a straight line including a width direction of the metal strip and the reference point; and calculating a meandering amount of a metal strip in each stage based on the calculated end portion position in the width direction of the metal strip in each stage.