JPH02187210A - Device for transferring rolled stock - Google Patents

Abstract

PURPOSE:To improve product accuracy of a rolled stock by applying tension to the stock by controlling a driver at both times when the tip of the stock enters pinch rolls and when the rear end of the stock passes through a finish mill. CONSTITUTION:A position of a rolled stock 10 is detected by a rolled stock detector 5 when the tip of the stock 10 passes through 1st pinch rolls 1 and its signal is outputted to a rolled stock tracking device 6. A controller 7 controls a driver 8 of the 1st pinch rolls 1 based on the above signal; an upper roll 1b moves toward a lower roll 1a to draft the stock 10. Concurrently, a rotating speed of the rolls 1 is decided to a prescribed value and a tension of the stock 10 between the 1st pinch rolls 1 and a final stand 4a is decided to a prescribed value. When the stock 10 passes through the final stand 4a, 2nd pinch rolls 1 starts to draft the stock 10 and tension control for the stock 10 between the 2nd rolls 1 and pinch rolls 2 for a down coiler is surely performed before the stock passes through the 1st rolls 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a rolled material conveying device, and more particularly to a rolled material conveying device that can improve the product accuracy of rolled materials.

(Prior Art) Conventionally, a rolled material conveying device for hot rolling of steel is known, which includes a plurality of table rollers arranged between a finishing mill and a down coiler.

In such a rolled material conveying device, the rolled material finish-rolled by the finishing mill is conveyed to a down coiler by table rollers and wound up by this down coiler.

Further, while being transported to the down coiler, the rolled material is cooled by being sprayed with water from above and below.

In addition, after the tip of the rolled material is rolled into the down coiler,
The down coiler and the finishing mill rotate synchronously until the tail end passes through the finishing mill, and a substantially constant tension is applied to rolling +4. By keeping the tension of the rolled material substantially constant in this manner, the shape of the rolled material and the winding temperature in the down coiler are kept uniform.

(Problems to be Solved by the Invention) As described above, the rolled material is conveyed by table rollers from the finishing mill to the down coiler. in this case,
Since table rollers do not perform a rolling action on the rolled material, there is almost no tension on the rolled material until the tip of the rolled material reaches the down coiler and after the tail end of the rolled material passes through the finishing mill. is not added.

If tension is not applied to the rolled material in this manner, rolling control becomes unstable, the shape of the rolled material and the winding temperature in the down coiler cannot be made uniform, and product precision deteriorates.

The present invention has been made in consideration of these points,
Approximately constant tension is applied to the rolled material until the tip of the rolled material reaches the down coiler and even after the tail end of the rolled material passes through the finishing mill to ensure uniform shape and coiling temperature of the rolled material. It is an object of the present invention to provide a rolled material conveying device that can achieve uniform product accuracy over the entire rolled material.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a pinch roll disposed between a finishing rolling mill and a down coiler for conveying and rolling down the rolled material, a drive device for driving the pinch roll, and a drive device for driving the pinch roll. and a control device for controlling the device, and the control device is configured to apply a predetermined tension to the rolled material between the finishing mill and the pinch roll when the tip of the rolled material enters the pinch roll. controlling the drive device, and controlling the drive device so as to apply a predetermined tension to the rolled material between the down coiler and the pinch roll when the tail end of the rolled material exits the finishing rolling mill; This is a featured rolled material conveying device.

(Function) When the tip of the rolled material enters the pinch rolls, the rolled material is transported and rolled down by the pinch rolls driven by the drive device, and a predetermined tension is applied to the rolled material between the finishing mill and the pinch rolls. is added.

On the other hand, when the tail end of the rolled material comes out of the finishing mill, the rolled material is conveyed and rolled down by the pinch rolls driven by the drive device, and a predetermined tension is applied to the rolled material between the down coiler and the pinch rolls. .

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of a rolled material conveying device according to the present invention.

In FIG. 1, the rolled material conveying device is comprised of stands 4a and 4b.
A plurality of pinch rolls 1 are arranged at predetermined intervals between a finishing rolling mill 4 and a down coiler 3, and between each pinch roll 1, for example, two table rollers 9 are arranged. It is composed of Also down coiler 3
A down coiler pinch roll 2 is provided immediately upstream of the down coiler.

Among these, the pinch roll 1 is the lower roll 1a and the upper roll 1.
b, and the lower roll 1a is a table roller 9.
It also functions as a conveyance roller. Further, the upper roll 1b moves perpendicularly to the lower roll 1a, and the rolled material 10 is rolled down between the lower roll 1a and the upper roll 1b.

In addition, each pinch roll 1 is rotated to convey the rolled material 10, and the upper roll 1b is rotated to convey the rolled material 10.
A drive device 8 is provided for rolling down the rolling month 10 by moving it with respect to the direction a. Furthermore, a control device 7 that controls the drive of the drive device 8 is connected to the drive device 8 .

On the other hand, in the finishing mill 4 and each pinch roll 1, there is a rolled material detector 5 for detecting the position of the rolling month 10 on the rolling line.
is installed, and this rolled material detector 5 is connected to a rolled material tracking device 6.

Further, rolled material tracking information from the rolled material tracking device 6 is sent to the control device 7.

The control device 7 determines the pinch roll 1 to be controlled based on the rolled material tracking information, sets the rolling interval and rotation speed of the pinch roll 1 to predetermined values, and controls the pinch roll 1.
Each drive device 8 is controlled to maintain the rolled material 10 at a predetermined tension between the finishing mill 4 and the pinch roll 1 and the down coiler 3.

Next, the operation of this embodiment having such a configuration will be explained.

First, while the rolled material 10 is in the finishing mill 4, each pinch roll 1 waits at a rolling interval sufficient for the tip of the rolled material 10 to pass. At the same time, each pinch roll 1 rotates at a speed that takes into account the advance rate of the final stand 4a of the finishing mill.

When the tip of the rolled material 10 conveyed by the table roller 9 passes the first pinch roll 1 at the most upstream position, the position of this rolled material 10 is detected by the rolled material detector 5,
This detection signal is output to the rolled material tracking device 6. Then, based on the rolled material tracking information signal from the tracking device 6, the control device 7 determines the first pinch roll 1 as the control target.

Subsequently, the drive device 8 of the first pinch roll 1 is controlled by the control device 7, and the upper roll 1b of the pinch roll 1 moves toward the lower roll 1a to determine a predetermined rolling interval, and the rolled material 10 Press down.

At the same time, the rotational speed of the first pinch roll 1 t-1 is set to a predetermined value, and the tension of the rolled material 1o between the first pinch roll 1 and the final stand 4a is set to a predetermined value.

Next, when the tip of the rolled material 10 passes the second pinch roll 1, the position of the rolled material 10 is detected by the rolled material detector 5 of the second pinch roll, and this detection signal is used to track the rolled material. It is output to device 6. Subsequently, the drive device 8 of the second pinch roll 1 is controlled by the control device 7, and the pressing interval and rotational speed of the second pinch roll 1 are set to a predetermined one shift.

When the tension of the rolled material 1o is controlled by the second pinch roll 1, the upper roll 1b of the first pinch roll 1 rises and the tension between the second pinch roll 1 and the final stand 4a is increased. The tension of the rolled material 10 is set to a predetermined value. In this case, the rolling action by the first pinch roll 1 stops. At the same time, the lower roll 1a of the first pinch roll 1 conveys the rolled material 10 together with the table roller 9.

In this way, the tension of the rolled material 10 is maintained at a predetermined value between the pinch roll 1 and the final stand 4a, which are successively located downstream.

After the tip of the rolled material 10 has passed the down coiler pinch roll 2, the rolling intervals of all the pinch rolls 1 are sufficiently widened, and the rolled material 10 is rolled between the down coiler pinch roll 2 and the final stand 4a as before. Tension control is provided.

Subsequently, the tail end of the rolled material 10 is transferred to the final stand 4 of the finishing mill.
When approaching point a, the first pinch roll 1 at the most upstream side rotates at a speed that takes the advance rate into consideration with the speed of the final stand 4a, and starts rolling down the rolled material 10. Then, just before the tail end of the rolled material 10 passes through the final stand 4a,
Tension control of the rolled material 10 is started between the first pinch roll 1 and the down coiler pinch roll 2.

Subsequently, when the rolled material 10 passes through the final stand 4a, the second pinch roll 1 rotates at the same speed as the first pinch roll 1 and starts pressing the rolled material 10. Then, tension control of the rolled material 10 between the second pinch roll 1 and the down coiler pinch roll 2 is established before it leaves the first pinch roll 1.

In this way, the rolled material 10 is maintained at a predetermined value between the pinch roll 1 and the down coiler pinch roll 2, which are successively located downstream.

As described above, according to this embodiment, the rolled material 10 can be conveyed from the finishing mill 4 to the down coiler 3 while maintaining a constant tension over substantially the entire length thereof.

For this reason, the shape of the rolled material 10 and the winding temperature in the down coiler 3 are made uniform to ensure uniform product precision throughout the rolled material 10. I can do something.

〔Effect of the invention〕

As described above, according to the present invention, a rolled material can be conveyed from the finishing mill to the down coiler while maintaining a constant tension over its entire length.

Therefore, the shape of the rolled material and the winding temperature in the down coiler can be made uniform, and uniform product precision can be obtained over the entire rolled material, and the yield can be improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic system diagram showing an embodiment of a rolled material conveying device according to the present invention. 1... Pinch roll, 2... Pinch roll for down coiler, 3... Down coiler, 4... Finishing rolling machine,
5... Rolled material detector, 6... Rolled material tracking device, 7.
...Control device, 8...Drive device, 9...Table roller, 10...Rolled material. Applicant's agent Mr. Sato

Claims (1)

[Claims] A pinch roll disposed between a finishing mill and a down coiler for conveying and rolling down the rolled material, a drive device for driving the pinch roll, and a control device for controlling the drive device, the control device controls the driving device to apply a predetermined tension to the rolled material between the finishing mill and the pinch rolls when the leading end of the rolled material enters the pinch roll, and The rolled material conveying device is characterized in that the driving device is controlled to apply a predetermined tension to the rolled material between the down coiler and the pinch roll when the rolled material leaves the finishing mill.