JP2970488B2 - Plate meandering correction device for tandem rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a meandering correction device for a hot and cold tandem rolling mill.

[0002]

2. Description of the Related Art In a conventional meandering correction method for a tandem rolling mill, as disclosed in Japanese Patent Application Laid-Open No. 57-4315, upper and lower rolls are crossed within a parallel plane of a rolled plate, and a roll shaft center is formed. Rolling is performed with the crossing angle of the rolled plate kept constant and the meandering correction method of controlling the meandering of the rolled plate online by rotating in the same direction within the parallel plane of the rolled plate while maintaining the crossing angle of the upper and lower rolls Are known.

[0003] In a conventional method and a device for correcting a meandering of a tandem rolling mill, a method of correcting a meandering of a rolling device in which a plurality of tandem rolling mills are connected is disclosed in JP-A-63-20 / 1988.
As disclosed in Japanese Unexamined Patent Publication No. 114, the right and left roll end pressure correction amounts are calculated from the difference between the meandering amount of the rolled material and the meandering correction target value, and the left and right roll gaps are adjusted to adjust the meandering of the rolled material. Methods and devices for making corrections are known.

The meandering correction target value is set by a target value setting device provided in the meandering control device, and the rolling material width direction on the inlet side or the outlet side of the upstream tandem rolling mill with respect to the tandem rolling mill to be controlled. The position is set as a meandering correction target value of the tandem rolling mill to be controlled.

[0005]

The conventional meandering correction device for a tandem rolling mill rolls the upper and lower rolls in order to improve the thickness distribution in the width direction of the rolled material and the flatness in the width or longitudinal direction. Rolling is performed in a state where the plates are crossed at a constant angle in a parallel plane of the plates.

[0006] In such asymmetric rolling in the width direction, rolling speed components in directions opposite to each other in the width direction of the rolled material tend to be unbalanced in the rolling control operation, and the rolled material exhibits a behavior of being displaced in the width direction.

In order to avoid this displacement, the rolling speed must be decreased, and if the displacement is to be corrected without decreasing the rolling speed, the thickness distribution of the rolled material in the width direction or the width direction or the longitudinal direction is reduced. There is a problem that the improvement effect of the flatness rolling control is reduced.

FIG. 5 shows a meandering correction method of a conventional tandem rolling mill and a meandering correction result by the apparatus. In FIG. 5, the conventional meandering correction method for a tandem rolling mill in which a plurality of tandem rolling mills are connected is a method of simultaneously correcting the meandering amounts e1 and e2 of the (i) and (i + 1) th tandem rolling mills. Then, on the exit side of the (i) tandem rolling mill, the meandering is corrected and converged.

In the (i + 1) th tandem rolling mill, (i)
When the meandering amount e2 to be corrected exceeds the meandering amount e2 to be corrected due to the influence of the meandering correction operation of the tandem rolling mill, the meandering as shown appears in the (i + 1) th tandem rolling mill at the end of the meandering correction operation of both tandem rolling mills. It continues until the meandering correction point of the (i) tandem rolling mill reaches the (i + 1) tandem rolling mill.

[0010] The effect of the meandering correction operation of the tandem rolling mill (i) is as follows.
There is a problem that the meandering on the outlet side of the (i + 1) -th tandem rolling mill is increased until it propagates to the outlet side of the + 1-th tandem rolling mill and ends.

Further, even when a large meandering occurs instantaneously in a rolling line connecting a plurality of tandem rolling mills, this phenomenon appears, and there is a problem with great danger.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to quickly converge the meandering of a rolled material so as not to cause large meandering and to achieve a stable rolling control of a plate of a tandem rolling mill. It is an object of the present invention to provide a meandering correction method and its device.

[0013]

Means for Solving the Problems] plate meandering correction apparatus of a tandem rolling mill according to claim 1 for solving the above problem is, in a plate meandering correction device, mobile <br/> the measurement meandering amount measured by the measuring device A meandering control device that calculates a timing and a roll operation amount at which a meandering correction portion of a rolled material reaches a downstream tandem rolling mill based on a speed and a predicted meandering amount, and a storage device that temporarily holds the calculated roll operation amount. And, a delay device that delays the roll operation until the meandering correction portion of the rolled material corrected by the upstream tandem rolling mill reaches the downstream tandem rolling mill, and controls the meandering correction of the rolled material by the upstream tandem rolling mill. Calculate the predicted time and the meandering amount until the result obtained appears on the downstream tandem rolling mill, and the meandering correction part of the rolled material corrected by the upstream tandem rolling mill is the downstream tandem rolling mill after the predicted time At the arrival timing, meandering correction control is performed using a roll operation amount corresponding to a value obtained by subtracting the predicted meandering amount from the measured meandering amount of the downstream tandem rolling mill in advance, and this meandering correction control is performed for each tandem rolling mill. Is performed continuously.

According to a second aspect of the present invention, there is provided a tandem rolling machine with a meandering correction device, comprising: a meandering amount and a moving speed measured by a measuring device;
A meandering control device meandering correction portion of the strip on the basis of the measurement meandering amount computing a timing and roll operation amount reaching the downstream tandem mill, temporarily store holding a measurement meandering amount measured by the measuring device Device, and a delay device that delays the measured meandering amount until the meandering correction portion of the rolled material corrected by the upstream tandem rolling mill reaches the downstream tandem rolling mill, and corrects the meandering of the rolled material by the upstream tandem rolling mill. The predicted time until the control result appears in the downstream tandem rolling mill is calculated and the meandering amount is measured, and the meandering correction portion of the rolled material corrected by the upstream tandem rolling mill is changed to the downstream tandem rolling mill after the predicted time. At the timing of reaching, the roll operation amount corresponding to a value obtained by subtracting the measured meander amount of the upstream tandem rolling mill from the measured meander amount of the downstream tandem rolling mill in advance is set as the target value. Performs meandering correction control, and performing in succession the meandering correction control for each tandem mill.

Further, in the tandem rolling mill according to claim 3,
The plate meandering correction device is measured by the measuring device to the plate meandering correction device.
Measurement meandering amount, moving speed, mark measurement signal and prediction
Based on the meandering amount, the meandering correction part of the rolled material is
Timer and roll operation to set the time to reach the rolling mill
Meandering control device that calculates the amount and the calculated roll operation amount
And a tandem rolling mill on the upstream side
The meandering correction part of the rolled material corrected in step tandem rolling on the downstream side
A delay device that delays the roll operation until it reaches the machine.
A mark that detects a mark indicating a meandering correction point on a rolled material that has been subjected to meandering correction processing by an upstream tandem rolling mill
Start timing of the timer based on the measurement signal, and set the timer.
Taimin reaching downstream tandem mill at fixed time
Determine the grayed, pre from the measured amount of meandering of the downstream tandem mill
The roll operation amount equivalent to the value obtained by subtracting the
As well as performing meandering correction control as the target value,
The direct control is continuously performed for each tandem rolling mill .

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall configuration diagram of a meandering correction device for a tandem rolling mill according to the present invention.

In FIG. 1, a meandering correction device 1 for a tandem rolling mill comprises a tandem rolling mill 2, a measuring device 4, a roll operating device 5, and a meandering correcting device 9 for a plate.

The tandem rolling mill 2 (hereinafter referred to as a stand 2) performs rolling while simultaneously or independently changing the direction of the upper and lower roll shafts to improve the thickness distribution and flatness of the rolled material 3 while rolling. Correct the meandering of material 3.

The measuring device 4 is disposed downstream of each stand 2 to measure the meandering amount, the moving speed, and the meandering state of the rolled material 3 such as the meandering correction point, and sends a measurement meandering signal to the plate meandering correcting device 9. e, measurement speed signal v, mark measurement signal m, and other measurement signals (e, v, m).

The roll operating device 5 operates the upper and lower rolls of each stand 2 on the parallel surface or the vertical surface of the rolled material 3 based on the roll operation signal (θ) provided from the plate meandering correcting device 9.

The plate meandering correction device 9 includes a meandering control device 6,
It is composed of a storage device 7 and a delay device 8, and based on measurement signals (e, v, m) such as a measurement meander signal e, a measurement speed signal v, and a mark measurement signal m supplied from each measurement device 4. A roll operation signal (θ) is provided to the roll operation device 5.

The time and the meandering time until the result of the meandering correction control performed in the upstream stand 2 appears on the downstream stand are
The meandering correction control in the downstream stand calculates and predicts the roll operation amount corresponding to the corrected meandering amount by subtracting the predicted meandering amount in advance from the measurement signal (e, v, m). The operation is performed by driving the roll operation device 5 with the roll operation signal (θ).

The meandering correction control is performed when the result of the meandering correction control performed in the upstream stand 2 reaches the downstream stand based on the calculated predicted time.

The meandering control device 6 is provided with a calculating means and has a meandering amount estimated based on the measured meandering signal e, the measured speed signal v, and the mark measurement signal m supplied from the measuring device 4 installed downstream of each stand. And a meandering correction amount, a roll operation amount, a meandering correction timing, and the like.

The storage device 7 has a holding means for temporarily storing signals, and temporarily stores the roll operation amount or the measured meandering amount calculated by the meandering control device 6.

The delay means 8 includes a delay means for delaying a signal for a predetermined time, and when the roll operation amount stored in the storage means 7 is provided to the roll operation device 5 or when the measured meandering amount is provided to the meandering control device 6. Until the timing at which the meandering correction control operation is performed.

FIG. 2 is a block diagram showing the principal part of the plate meandering correction apparatus according to the first embodiment. This invention calculates the meandering correction operation amount in the downstream stand in consideration of the influence of the meandering correction operation of the upstream stand based on FIG. 2, and performs meandering correction control at the timing when the meandering correction part in the upstream stand reaches. An embodiment will be described.

FIG. 2 shows the (i) and (i + 1) th stands which are a part of the plate meandering correction device 1 of the tandem rolling mill composed of a plurality of stands. Since both stands have the same structure. (I) The stand will be described, and the rolled material 3 and the roll operating device 51 will be described with reference to FIG.
Therefore, the description is omitted.

In FIG. 2, the meandering amount measuring device 41a
Sensors such as a CCD camera or a differential transformer are arranged at both side ends of the rolled material 3 to measure a length of a deviation of the rolled material 3 from a set value in a width direction to generate a measurement meander signal e1.

The speed measuring device 42a is provided with a length detector which freely contacts the side edge of the rolled material 3 and generates a pulse signal in accordance with the movement of the rolled material 3, and counts the pulses corresponding to the moving distance. To generate a measured speed signal v1.

The meandering control device 6 includes a predicted meandering calculating means 61.
a, meandering correction calculating means 61b, and correction counting means 61c
And transfer time calculation means 61d.

The predicted meander calculating means 61a is provided with an arithmetic unit, and calculates the (i-1) of the rolled material 3 based on the corrected meander signal eS0 and the predicted arrival time signal supplied from the (i-1) th stand (not shown) based on t01. The meandering amount corrected at the (stand) No. stand is calculated by calculating the amount of meander that is expected to appear when it reaches the (i) stand to generate the predicted meander signal eP1.

The meandering correction calculating means 61b is provided with a calculating device and has a meandering signal e supplied from the meandering amount measuring device 41a.
Based on 1 and the predicted meander signal eP1 provided from the predicted meander calculating means 61a, a corrected meander signal eS1 is generated and provided to the correction coefficient means 61c and to the predicted meander calculating means 62a of the (i + 1) th stand.

The corrected meander signal eS1 is obtained by calculating the predicted meander signal eP1 provided by the predicted meander calculating means 61a from the measured meander signal e1 which is the amount of meander of the (i) stand measured downstream of the (i) stand. The meandering amount to be corrected at the (i) th stand after subtraction.

The correction counting means 61c is provided with a coefficient unit and has a correction meandering signal eS1 supplied from the meandering correction calculation means 61b.
Is converted into a roll operation amount of the roll operation device 5 to generate a roll operation signal θ01.

The transfer time calculating means 61d is provided with a calculating device and has a measuring speed signal v1 supplied from the speed measuring device 42a.
Is calculated on the basis of (i + 1)
The predicted meander calculating means 62a and the delay means 82 of the third stand are provided.

The estimated arrival time signal t12 is obtained by dividing the distance between the known stand (i) and the stand (i + 1) and the speed measuring device 42a by the measured speed v1 to obtain the (i) of the rolled material 3. The meandering of the part corrected at the stand is (i
+1) This is a predicted arrival time obtained by calculating the time required to reach the No. 1 stand.

The storage device 7 includes a holding unit 7 having a storage device.
1 to temporarily hold the roll operation signal θ01 supplied from the correction coefficient means 61c and provide the roll operation signal θM1 to the delay means 81.

The delay unit 8 includes a delay unit 8 having a timer.
1 and the roll operation signal θM1 supplied from the holding means 71 is delayed by the time of the predicted arrival time signal t01 supplied from the (i-1) th stand and rolled to the roll operation device 5 of the (i) th stand. An operation signal θ1 is provided.

FIG. 6 shows a meandering correction method and a meandering correction result of the tandem rolling mill according to the present invention. In FIG. 6, the meandering correction operation is not performed on the meandering amounts e1 and e2 of the stands (i) and (i + 1) at the same time, and after the meandering correction of the stand (i) is performed, (i).
The figure shows the meandering state when the meandering correction of the +1) th stand is performed.

The meandering correction of the (i + 1) th stand is performed by adjusting the estimated arrival time signal t supplied from the transfer time calculation means 61d.
The meandering correction is performed when the meandering correction point of the (i) th stand reaches the (i + 1) th stand with a delay of 12 hours.

As described above, according to the first aspect of the present invention, the meandering correction device for a tandem rolling mill is configured such that the meandering correction device uses the meandering amount and the moving speed measured by the measuring device, and the meandering of the rolled material based on the predicted meandering amount. A meandering control device that calculates the timing at which the correction portion reaches the downstream stand and the roll operation amount, a storage device that temporarily stores the calculated roll operation amount, and a meandering correction portion of the rolled material corrected by the upstream stand And a delay device that delays the roll operation until it reaches the downstream stand, and calculates a predicted time and a predicted meander amount until the result of performing the meandering correction control of the rolled material at the upstream stand appears at the downstream stand. At the timing when the meandering correction portion of the rolled material corrected at the upstream stand reaches the downstream stand after the predicted time, the predicted meandering amount is previously calculated from the measured meandering amount of the downstream stand. The meandering correction control is performed with the roll operation amount corresponding to the subtracted value as a target value, and the meandering correction control can be continuously performed for each stand. The meandering correction control can be performed in consideration of the result.

FIG. 3 is a block diagram of a main part of the plate meandering correction apparatus based on the actual meandering amount calculation according to the second aspect. The meandering correction operation amount in the downstream stand is calculated based on the measured meandering amount of the upstream stand and the measured meandering amount of the downstream stand, and the plate meandering correction control is performed at the timing when the meandering correction part in the upstream stand reaches. An embodiment of the present invention will be described with reference to FIG.

FIG. 3 shows the (i) and (i + 1) th stands which are part of the plate meandering correction device 1 of the tandem rolling mill composed of a plurality of stands, and the structures of both stands are the same. (I) Stand No. will be described, and the rolled material 3 and the roll operating device 51 are shown in FIG.
FIG. 2 shows the meandering amount measuring device 41a and the speed measuring device 42a.
Therefore, the description is omitted.

In FIG. 3, the meandering control device 11 includes meandering correction calculating means 61b, correction counting means 61c, and transfer time calculating means 61d.

The meandering correction calculating means 61b is provided with an arithmetic unit and has a meandering signal e supplied from the meandering amount measuring device 41a.
Based on the delay measurement meander signal eO0 supplied from the delay means of the (i-1) th stand (not shown), a corrected meander signal eS1 is generated and provided to the correction coefficient means 61c.

The corrected meandering signal eS1 is measured on the downstream side of the (i-1) th stand from the measured meandering signal e1 which is the meandering amount of the (i) stand measured on the downstream side of the (i) th stand. This is the meandering amount to be corrected at the (i) th stand obtained by delaying and subtracting the measured meandering signal e0, which is the meandering amount of the (i-1) th stand.

The correction coefficient means 61c is provided with a coefficient unit and has a correction meandering signal eS1 supplied from the meandering correction calculation means 61b.
Is converted into a roll operation amount of the roll operation device 5 to generate a roll operation signal θ1.

The transfer time calculating means 61d is provided with a calculating device and has a measuring speed signal v1 supplied from the speed measuring device 42a.
Calculates the estimated arrival time signal t12 based on
1 to provide.

The estimated arrival time signal t12 is obtained by dividing the distance between the known stand (i) and the stand (i + 1) and the speed measuring device 42a by the measured speed v1 to obtain (i) of the rolled material 3. The meandering of the part corrected at the stand is (i
+1) This is a predicted arrival time obtained by calculating the time required to reach the No. 1 stand.

The storage device 7 includes a holding unit 7 having a storage device.
1 and temporarily stores the measured meandering signal e1, which is the meandering amount of the (i) stand measured downstream of the (i) stand, and provides the stored meandering meandering signal eM1 to the delay means 81.

The delay unit 8 includes a delay unit 8 having a timer.
1 and is supplied to the meandering correction calculating means 62b of the (i + 1) th stand after delaying the stored measurement meandering signal eM1 supplied from the holding means 71 by the time of the predicted arrival time signal t12 supplied from the transfer time calculating means 61d. I do.

As shown in FIG. 6, the meandering correction of the (i + 1) th stand is performed by the transfer time calculating means 6 of the (i) th stand.
The meandering correction is performed when the meandering correction point of the (i) th stand reaches the (i + 1) th stand with a delay of the expected arrival time signal t12 supplied from 1d.

As described above, the meandering correction device for a tandem rolling mill according to the second aspect includes the meandering amount measured and the moving speed measured by the measuring device and the moving speed of the upstream stand.
A meandering control device meandering correction portion of the strip on the basis of the measurement meandering amount computing a timing and roll operation amount reaching the downstream stand, a storage device for temporarily storing the measurement meandering amount measured by the measuring device A delay device that delays the measured meandering amount until the meandering correction portion of the rolled material corrected at the upstream stand reaches the downstream stand, and the result of performing the meandering correction control of the rolled material at the upstream stand is the downstream side. The estimated time to appear on the stand is calculated and the meandering amount is measured, and at the timing when the meandering correction portion of the rolled material corrected at the upstream stand reaches the downstream stand after the estimated time, the measured meandering amount of the downstream stand is calculated. The meandering correction control is performed using the roll operation amount corresponding to the value obtained by subtracting the measured meandering amount of the upstream stand in advance as a target value, and the meandering correction control is performed by each of the masters. Can be performed continuously for each de, in the downstream stands, it can be a plate meandering correction control Fixed meandering amount obtained by subtracting the meandering amount measured by the upstream stand.

FIG. 4 is a block diagram of a main part of a meandering plate correcting apparatus for detecting a correction position mark according to a third embodiment. A description will be given of an embodiment of the present invention, in which a mark indicating a meandering correction point corrected in the upstream stand based on FIG. 4 passes through the meandering measurement device and performs plate meandering correction control in the downstream stand after a predetermined time. I do.

FIG. 4 shows the transfer time calculating means 61d and 62d of the meandering control device 6 for calculating and estimating the arrival time at the downstream stand of the meandering correction part described above with reference to FIG. 2 and the mark signal generating means 61e and 62e. In addition, speed measurement device 42a,
42b is replaced by mark detection devices 43a and 43b, and the (i) stand and (i +
Since the 1st stand has the same configuration, the description will focus on the mark detection device 43a and the mark signal generating means 61e of the (i) th stand.

In FIG. 4, the mark detecting device 43a
A mark indicating a meandering correction point, which is provided at the same position as the meandering amount measuring device 41a with a CCD camera and is attached to the side edge of the rolled material 3, is detected by processing an image signal provided by the CCD camera. The measurement signal m1 is provided to the mark signal generation means 61e.

The mark signal generating means 61e provided in the meandering control device 12 includes a timer, starts counting time of the timer based on the mark measurement signal m1, and outputs a mark arrival signal m12 after counting a predetermined time ( The predicted meandering operation means 62a and the delay means 82 of the (i + 1) th stand are provided.

The preset time corresponds to the timing when the meandering correction point of the upstream stand reaches the downstream stand, and the speed of the rolled material 3 is assumed to be known, and the distance between the mark detection device 43a and the downstream stand is determined. Calculate and decide.

The above is the embodiment of the method and the apparatus for detecting the timing at which the meandering correction in the upstream stand reaches the downstream stand by detecting the meandering correction point mark on the rolled material 3. Note that the meandering control device 11 described above with reference to FIG. 3 uses the transfer time calculating means 61d and 62d for calculating and predicting the downstream stand arrival time of the meandering correction portion as the mark signal generating means, and the speed measuring devices 42a and 42b as the mark signal generating means. Since the configuration can be replaced with a mark detection device, and the embodiment is the same as that of FIG. 4, the description is omitted.

[0061] mark indicating Thus, the plate meandering correction apparatus of a tandem rolling mill according to claim 3, the meandering correction point on rolled material was subjected to meandering correction processing on downstream tandem mill
The timer starts timing based on the mark measurement signal that detects
To the downstream tandem rolling mill according to the time set by the timer.
Determine the timing to reach, the downstream tandem rolling mill
It corresponds to the value obtained by subtracting the predicted meandering amount from the measured meandering amount in advance.
When the meandering correction control is performed with the roll operation amount
In addition, this meandering correction control is continuously performed for each tandem rolling mill.
Is performed, it is possible to meandering correction point upstream stand to accurately capture the time to reach the downstream stand.

[0062]

As described above, the sheet meandering correction device of the tandem rolling mill according to the present invention is configured such that the sheet meandering correction device is provided with a rolled material based on the measured meandering amount, the moving speed, and the estimated meandering amount measured by the measuring device. A meandering control device that calculates the timing and roll operation amount at which the meandering correction portion reaches the downstream tandem rolling mill, a storage device that temporarily holds the calculated roll operation amount, and correction by the upstream tandem rolling mill A delay device that delays the roll operation until the meandering correction portion of the rolled material reaches the downstream tandem rolling mill, and the result of performing the meandering correction control of the rolled material by the upstream tandem rolling mill is a result of the downstream tandem rolling mill. Calculate the predicted time and the meandering amount until it appears, and at the timing when the meandering correction part of the rolled material corrected by the upstream tandem rolling mill reaches the downstream tandem rolling mill after the forecasting time. A meandering correction control is performed with a roll operation amount corresponding to a value obtained by subtracting the predicted meandering amount from the measured meandering amount of the downstream tandem rolling mill in advance, and the meandering correction control is continuously performed for each tandem rolling mill. In the downstream stand, plate meandering correction control can be performed in consideration of the result of the meandering correction in the upstream stand, so that transient increase in the meandering amount is suppressed to avoid undesired meandering and stable. Rolling control can be performed.

The meandering correction device for a tandem rolling mill according to the present invention includes a meandering amount and a moving speed measured by a measuring device and a meandering correction device for the upstream tandem rolling mill.
A meandering control device meandering correction portion of the strip on the basis of the measurement meandering amount computing a timing and roll operation amount reaching the downstream tandem mill, temporarily store holding a measurement meandering amount measured by the measuring device Device, and a delay device that delays the measured meandering amount until the meandering correction portion of the rolled material corrected by the upstream tandem rolling mill reaches the downstream tandem rolling mill, and corrects the meandering of the rolled material by the upstream tandem rolling mill. The predicted time until the control result appears in the downstream tandem rolling mill is calculated and the meandering amount is measured, and the meandering correction portion of the rolled material corrected by the upstream tandem rolling mill is changed to the downstream tandem rolling mill after the predicted time. At the timing of reaching, the roll operation amount corresponding to a value obtained by subtracting the measured meander amount of the upstream tandem rolling mill from the measured meander amount of the downstream tandem rolling mill in advance is set as the target value. In addition to performing meandering correction control, this meandering correction control can be performed continuously for each tandem rolling mill.At the downstream side stand, the sheet meandering correction control is performed using the corrected meandering amount obtained by subtracting the meandering amount measured at the upstream side stand. Therefore, it is possible to perform a stable rolling control by suppressing a transient increase in the meandering amount and avoiding an undesirable meandering.

Further, the sheet meandering correction device of the tandem rolling mill according to the present invention includes a sheet meandering correction device and a measuring device for measurement.
Measurement meandering amount, moving speed, mark measurement signal and prediction
Based on the meandering amount, the meandering correction part of the rolled material is
Timer and roll operation to set the time to reach the rolling mill
Meandering control device that calculates the amount and the calculated roll operation amount
And a tandem rolling mill on the upstream side
The meandering correction part of the rolled material corrected in step tandem rolling on the downstream side
A delay device that delays the roll operation until it reaches the machine.
A mark that detects a mark indicating a meandering correction point on a rolled material that has been subjected to meandering correction processing by an upstream tandem rolling mill
Start timing of the timer based on the measurement signal, and set the timer.
Taimin reaching downstream tandem mill at fixed time
Determine the grayed, pre from the measured amount of meandering of the downstream tandem mill
The roll operation amount equivalent to the value obtained by subtracting the
As well as performing meandering correction control as the target value,
Since the positive control performed continuously for each tandem mill, Ki out the meandering correction point upstream stand to accurately capture the time to reach the downstream stand, a downstream stand, meandering correction processing of the rolled plate Can be performed at an appropriate timing.

Accordingly, it is possible to provide a sheet meandering correction method for a tandem rolling mill and a device therefor that can stably control rolling without causing large meandering by rapidly converging the meandering of the rolled material.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a meandering correction device for a tandem rolling mill according to the present invention.

FIG. 2 is a block diagram of a main part of a plate meandering correction apparatus based on a predicted meandering amount calculation according to claim 1;

FIG. 3 is a block diagram of a main part of the plate meandering correction apparatus based on the actual meandering amount calculation according to claim 2;

FIG. 4 is a block diagram of a main part of a plate meandering correction apparatus based on correction position mark detection according to claim 3;

FIG. 5 shows a conventional meandering correction method for a tandem rolling mill and a meandering correction result by the apparatus.

FIG. 6 shows a meandering correction method and a meandering correction result of the tandem rolling mill according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Meandering correction device of tandem rolling mill, 2 ... Tandem rolling machine, 3 ... Rolled material, 4 ... Measuring device, 5, 51, 52 ... Roll operating device, 6 ... Meandering control device, 7 ... Storage device, 8 ...
Delay device, 9: plate meandering correction device, 21: (i) stand, 22: (i + 1) stand, 41a, 41b: meandering amount measuring device, 42a, 42b: speed measuring device, 43
a, 43b: mark detection device, 61a, 62a: predicted meander calculating means, 61b, 62b: meander correction calculating means, 61
c, 62c: correction coefficient means, 61d, 62d: transfer time calculation means, 61e, 62e: mark signal generation means, 7
1, 72 ... holding means, 81, 82 ... delay means, e, e
1, e2: measured meander signal, eM1, eM2: stored measured meander signal, eO0, eO1, eO2: delay measured meander signal, eP1, eP2
... Predicted meander signal, eSO, eS1, eS2 ... Corrected meander signal,
m, m1, m2 ... mark measurement signal, m01, m12, m23 ... mark arrival signal, t01, t12, t23 ... predicted arrival time signal,
v, v1, v2... measurement speed signal, (θ), θ01, θ02, θ
M1, θM2, θ1, θ2: Roll operation signal, (e, v, m)
... Measurement signal.

Claims (3)

(57) [Claims] 1. A plurality of tandem rolling mills for simultaneously or independently changing the directions of upper and lower roll axes to correct meandering of a rolled material, a roll operating device for operating rolls of the tandem rolling mill, and the tandem rolling machine. A measuring device arranged downstream of the mill to measure the meandering state of the rolled material; and a plate meandering for controlling the meandering of the rolled material by operating the roll operating device based on a signal supplied from the measuring device. A correction device;
In the meandering correction device for a tandem rolling mill, the meandering correction device includes a meandering correction portion for a rolled material based on the measured meandering amount, the moving speed, and the predicted meandering amount measured by the measuring device. Control device that calculates the timing at which the roller reaches the downstream tandem rolling mill and the roll operation amount, a storage device that temporarily stores the calculated roll operation amount, and the meandering of the rolled material corrected by the upstream tandem rolling mill A delay device that delays the rolling operation until the corrected portion reaches the downstream tandem rolling mill, and a delay device that performs the meandering correction control of the rolled material with the upstream tandem rolling mill until the result appears in the downstream tandem rolling mill. The predicted time and the meandering amount are calculated, and when the meandering correction portion of the rolled material corrected by the upstream tandem rolling mill reaches the downstream tandem rolling mill after the forecasting time, the downstream tandem pressure is calculated. The meandering amount is calculated by subtracting the predicted meandering amount from the measured meandering amount of the rolling mill in advance, and the meandering correction control is performed using the roll operation amount as a target value, and the meandering correction control is continuously performed for each tandem rolling mill. Tandem rolling mill meandering correction device. 2. A plurality of tandem rolling mills for simultaneously or independently changing the directions of upper and lower roll axes to correct meandering of a rolled material, a roll operating device for operating rolls of the tandem rolling mill, and the tandem rolling machine. A measuring device arranged downstream of the mill to measure the meandering state of the rolled material; and a plate meandering for controlling the meandering of the rolled material by operating the roll operating device based on a signal supplied from the measuring device. A correction device;
In the meandering correction device of a tandem rolling mill, the meandering correction device includes a measurement meandering amount and a moving speed measured by the measurement device and a measurement meandering of an upstream tandem rolling mill.
A meandering control device meandering correction portion of the strip on the basis of the amount for calculating the timing and roll operation amount reaches the downstream tandem mill, the measuring device temporarily holding store device the measured measured meandering amount at And a delay device that delays the measured meandering amount until the meandering correction portion of the rolled material corrected by the upstream tandem rolling mill reaches the downstream tandem rolling mill, and corrects the meandering of the rolled material by the upstream tandem rolling mill. The predicted time until the control result appears in the downstream tandem rolling mill is calculated and the meandering amount is measured, and the meandering correction portion of the rolled material corrected by the upstream tandem rolling mill is changed to the downstream tandem rolling mill after the predicted time. At the timing of reaching, the roll operation amount corresponding to a value obtained by subtracting the measured meander amount of the upstream tandem rolling mill from the measured meander amount of the downstream tandem rolling mill in advance is set as the target value. Performs line correction control, a plate meandering correction apparatus of a tandem rolling mill, which comprises carrying out successively the meandering correction control for each tandem mill. 3. The direction of the upper and lower roll axes is simultaneous or independent.
Tandem rolling to change the meander of rolled material by changing to
Roll operation for operating the rolls of the tandem rolling mill
Working device, and disposed downstream of the tandem rolling mill,
Measuring device for measuring meandering condition of rolled material, and the measuring device
Controls the roll operating device based on a signal supplied from the
A plate meandering correction device that makes and controls the meandering of rolled material,
In a meandering correction device for a tandem rolling mill, the meandering correction device includes a measuring meander measured by the measuring device.
Based on the line amount, moving speed, mark measurement signal and estimated meandering amount
Then, the meandering correction part of the rolled material is transferred to the downstream tandem rolling mill.
Calculate timer to set arrival time and roll operation amount
Meandering control device and the calculated roll operation amount
Retained storage device and modified with upstream tandem rolling mill
The meandering correction of the rolled material reaches the downstream tandem mill
A delay device that delays the roll operation until the mark measurement signal for detecting a mark indicating a meandering correction point on a rolled material that has been subjected to meandering correction processing by an upstream tandem rolling mill.
The timer starts timing based on the
The timing to reach the downstream tandem rolling mill
From the measured meandering amount of the downstream tandem rolling mill.
The roll operation amount corresponding to the value obtained by subtracting
To perform the meandering correction control, and
Filter to the unit performs sequentially for each tandem mill <br/> tandem rolling mill of a plate meandering correction system.