JP2846168B2 - Strip meandering correction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for correcting the strip meandering before winding the strip in a hot rolling line.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a conventional hot rolling line.
It is a side view which shows schematic structure after a finish rolling mill group. In the drawing, in a conventional hot rolling line, a strip S hot-rolled to a required thickness by a group of finishing mills 50 is shown.
Is cooled to a predetermined temperature by the cooling device 60.

[0003] A side guide 70 as a strip meandering preventing means disposed facing the exit side of the cooling device 60.
Is slightly opened to allow the leading end portion of the widened strip S to pass through, and furthermore, the strip S is bitten by a pinch roll 80 disposed forward in the strip traveling direction to apply tension,
It is wound around the coiler C by the down coiler 90.

[0004]

In the conventional apparatus as described above, a side guide 70 is disposed as a means for preventing the strip S from meandering after the rolling mill group. It is not possible to prevent meandering at the leading end and the trailing end, and the strip S
In the center of the side guide 70, the side guide 70 and the strip S are in strong contact with each other because of the centering by the side guide 70, so that the strip S has defects such as ear scratches and ear cracks. There was a problem that shortened the life.

[0005] When the strip S is wound around the coil C, the meandering increases the ingress and egress of the edge portion on the side surface, and in the worst case, forms a bamboo shoot, causing bending of the ears and the like, resulting in a reduced product yield. This causes a problem to worsen.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a new strip meandering correcting apparatus which solves the above-mentioned disadvantages.

[0007]

In order to achieve the above object, a strip meandering correction apparatus according to the present invention comprises a rolling mill group.
The hot-rolled strip is cooled by a cooling device,
A top roll for transporting the strip in a hot rolling line for winding on a coiler via a pinch roll for irritation
And a bottom roll, and the top roll and
A rolling cylinder that applies a rolling force between the bottom rolls and its
A cooling device comprising a rolling force detector for detecting a rolling force;
And the steering pinch rolls disposed between the coiler pinch rolls, the top roll pressure and suspended
Air cylinder and hydraulic pressure connected to the pressure reduction cylinder
Servo device and the steering pinch roll
Camera for photographing both edges of the strip
And process the images taken by this camera and digitize
Image processing device for outputting the image and processing of the image processing device
Calculate the amount of meandering at the edge of the strip from the data
Meandering and outputting a meandering correction signal corresponding to the meandering amount
Calculated by the amount calculation processing device and this meandering amount calculation processing device
The meandering correction signal and the detection signal of the rolling force detector.
The hydraulic servo device is controlled by the
A control device for adjusting the reduction to correct the meandering of the strip .

[0008]

According to the strip meandering correcting apparatus of the present invention, the strip edge portion on the outgoing side is detected by the edge portion position detecting device while applying tension to the strip hot-rolled by the rolling mill group by the steering pinch roll. The detected position is digitized and transmitted to the meandering amount calculation processing device.

This meandering amount calculation processing device calculates the reduction amount of the work side and drive side pressure reduction cylinders for correcting the meandering of the strip based on the received movement amount of the strip edge portion to the work side or drive side. Send to control device.

On the other hand, the rolling force detector detects the working side and driving side rolling force during the operation of the steering pinch roll and transmits it to the control device.

The control device controls each hydraulic servo device based on the values received from the meandering arithmetic processing device and the rolling force detector so that the working side and driving side rolling down cylinders are respectively lowered within the elastic deformation range of the strip. Adjust the amount of reduction through to correct the meandering of the strip.

In the meandering correction of the strip, for example, when the strip edge moves to the working side at the exit side of the steering pinch roll, the amount of reduction of the working side pressing cylinder is increased within the elastic deformation range of the strip and the driving side is reduced. The reduction amount of the reduction cylinder.

When the strip edge moves to the drive side, the reduction amount of the drive side reduction cylinder is increased within the elastic deformation range of the strip, and the reduction amount of the work side reduction cylinder is reduced.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a schematic configuration of a hot rolling line after a finishing mill group, and FIG. 2 is a steering pinch of FIG. FIG. 3 is a side view showing a roll, and FIG. 3 is a front view showing a schematic configuration of the steering pinch roll and its accessories.

As shown in FIG. 1, the steering pinch roll 20 is disposed between the cooling device 60 and the pinch roll 80 in the hot rolling line. The cold rolled strip S is cooled to a predetermined temperature by the cooling device 60 and sent to the steering pinch roll 20.

2 and 3, a top roll 1 is fitted into a housing 5 of a steering pinch roll 20 via a roll chock 3 by hydraulic cylinders 6a and 6b so as to be able to move up and down.

A bottom roll 2 is disposed so as to face the top roll 1 up and down. The bottom roll 2 is inserted into a housing 5 via a roll chock 4, and a load cell 8.
a, 8b.

The strip S passes between the top roll 1 and the bottom roll 2.

Reference numeral 7 denotes a camera for detecting both edge portions of the strip S, which is disposed on the output side of the housing 5 on the working side W and the driving side D.

Reference numeral 9 denotes an air cylinder for lowering and suspending the top roll 1 via the roll chock 3.

As shown in FIG. 3, the camera 7 is controlled by the control device 1 via the image processing device 11 and the meandering amount calculation processing device 12.
4.

The left and right hydraulic cylinders 6a and 6b for raising and lowering the top roll 1 are provided with hydraulic servo circuits 16 respectively.
The hydraulic servo circuits 16a and 16b are connected to the control device 14 via the hydraulic device 15 via a and 16b.

The load cells 8a and 8b supporting the bottom roll 2 are also connected to the control device 14.

Next, the operation of the present apparatus will be described.
As shown in FIG. 1, a strip S hot-rolled to a required thickness by a finishing mill group 50 is cooled to a predetermined temperature by a cooling device 60, and is lowered by a steering pinch roll 20 within its elastic deformation range to obtain a tension. , The meandering is corrected, the pinch roll 80 is engaged to apply further tension, and the coil is wound around the coil C by the down coiler 90.

At this time, the steering pinch roll 20
The camera 7 shown in FIG. 3 constantly captures both edges of the strip S coming out of the apparatus, and transmits the image to the image processing apparatus 11.

The image processing device 11 digitizes this image signal and sends it to the meandering amount operation processing device 12, which sends the image signal to the working side W or the driving side D of the edge portion of the received strip S. The amount of reduction of both hydraulic cylinders 6a and 6b for correcting the meandering is calculated based on the amount of movement of the vehicle and transmitted to the control device 14.

On the other hand, while the steering pinch roll 20 is operating, both load cells 8a and 8b detect the rolling force on the working side W and the driving side D and transmit the detected rolling force to the control device 14.

The controller 14 lowers the hydraulic cylinders 6a, 6b of the working side W and the driving side D within the elastic deformation range of the strip S, respectively, based on the numerical values received from the meandering amount processing unit 12 and the load cells 8a, 8b. In this way, the amount of reduction is adjusted via the hydraulic servo circuits 16a and 16b, respectively, to correct the meandering of the strip S.

In the meandering correction, for example, when the edge of the strip S moves to the working side W, the amount of reduction of the hydraulic cylinder 6a on the working side W is increased within the elastic deformation range of the strip S, and the hydraulic pressure on the driving side D is increased. The amount of reduction of the cylinder 6b is reduced.

When the edge moves to the driving side D,
The amount of reduction of the hydraulic cylinder 6b on the driving side D is increased, and the amount of reduction of the hydraulic cylinder 6a on the working side W is decreased.

[0031]

As described above, according to the meandering correcting apparatus for a strip of the present invention, the meandering of the strip is detected, and the amount of reduction of the working-side and driving-side reducing cylinders is controlled by the detected value. By arranging the steering pinch roll for correcting the meandering between the rolling mill group of the hot rolling line and the pinch roll for the coiler, it is possible to correct the meandering of the leading end and the tail end of the strip, and to pinch the coiler. It is possible to center and feed the roll, and even after the strip has passed through the rolling mill group,
Since tension is applied to the coiler and the steering pinch roll, a coil having a good winding shape can be obtained.

Further, since centering by the side guide is not performed except for the end portion and the tail end portion of the strip,
The occurrence of defects such as ear breaks and ear scratches due to strong contact of the strip edge portion is eliminated, and the life of the side guide can be prolonged. Therefore, the yield of the strip and the quality of the coil can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a schematic configuration after a finishing mill group of a hot rolling line according to one embodiment of the present invention.

FIG. 2 is an enlarged side view of the steering pinch roll in FIG.

FIG. 3 is a side view showing a schematic configuration of a steering pinch roll and its attached equipment.

FIG. 4 is a side view showing a schematic configuration after a finishing mill group of an example of a conventional hot rolling line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top roll 2 Bottom roll 3, 4 Roll chocks 5 Housing 6a, 6b Hydraulic cylinder 7 Camera 8a, 8b Load cell 9 Air cylinder 11 Image processing device 12 Meandering amount calculation processing device 14 Control device 15 Hydraulic device 16a, 16b Hydraulic servo circuit 20 Steering Pinch roll 50 Finishing mill group 60 Cooling device 80 Pinch roll 90 Down coiler S Strip C Coil D Drive side W Work side

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoji Teramoto 4-6-22 Kannonshinmachi, Nishi-ku, Hiroshima City Inside the Hiroshima Works of Sanishi Heavy Industries, Ltd. (72) Inventor Osamu Akutsu 1 Kimitsu, Kimitsu City, Chiba Prefecture New Japan Inside the Kimitsu Steel Works of Steel Corporation (72) Inventor Osamu Kono 1 at Kimitsu City, Kimitsu City, Chiba Prefecture Inside of the Nippon Steel Corporation Kimitsu Works (72) Inventor Yasuhide Sato 1 at Kimitsu City, Kimitsu City, Chiba Prefecture New Japan Ryoichi Nishiyama, Inventor, Ritsuichi Nishiyama, Chiba Pref., Kimitsu Steel Works, Ltd. (56) References JP 55-92229 (JP, A) Kaihei 5-115912 (JP, A) JP-A 63-25208 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B21B 37/00, 39/14 B21C 47/00, 47/34

Claims (1)

(57) [Claims] 1. A strip hot rolled by a rolling mill group.
Is cooled by a cooling device and passed through a pinch roll for coiler.
In hot rolling lines winding in the coiler and the strike
Equipped with a top roll and bottom roll for transporting the lip
And a rolling force between the top roll and the bottom roll.
A steering pinch rolls arranged between the pinch rolls for the coiler and the cooling device comprises a rolling force detector for detecting a pressure cylinder and rolling force is added, before
An air cylinder for rolling and suspending the top roll
A hydraulic servo device connected to the pressure reduction cylinder;
The strip is disposed on the exit side of the aligning pinch roll,
Camera that shoots both edges of the
An image processing device that processes shadowed images, digitizes and outputs
From the processing data of the image processing apparatus.
Calculated the amount of meandering at the edge of the
A meandering amount calculation processing device for outputting a meandering correction signal;
The meandering correction signal calculated by the row amount calculation processing device and the
The hydraulic servo device is activated by the detection signal of the pressure-reducing force detector.
Control and adjust the reduction of said reduction cylinder to strip
A meandering correction device for correcting the meandering of the strip.