JP3386865B2 - Strip gap forming 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 strip gap forming device.

[0002]

2. Description of the Related Art In a hot rolling line, as shown in FIG. 4, a strip 2 rolled by a rolling mill 1 is conveyed downstream in a line direction 5 by a hot run table 4 formed by arranging a number of table rollers 3. On the way, cooling zone 6
It is cooled by a coiler, tension is applied by a pinch roll 7 on the winder inlet side, the direction is changed, and it is wound up by a winder 8 such as a down coiler. After passing through the same route as described above, it passes through the winder input side pinch roll 7 and enters the subsequent winder input side pinch roll 9, and tension is applied by the winder input side pinch roll 9. At the same time, the direction is changed, and the winder 10 is wound by a winder 10 such as a down coiler.

In recent years, a cutting device 11 such as a shear is provided on the entrance side of the former-side winding machine pinch roll 7 so that the long strip 2 is cut by the cutting device 11 while two winding devices are wound. There is a desire to be able to take turns alternately with the machines 8 and 10.

[0004]

However, the cutting device 11 cuts the strip 2 and the two winding machines 8 and 10 are used.
However, there are the following problems when it is possible to take turns alternately.

That is, in order to apply the winding tension to the coil 36 being wound, since the pinch roll 7 controls the speed at a delay from the line speed, the rolling machine 1 and the winding-side pinch of the winding machine are controlled. The strip 2 between the rolls 7 is in a slackened state. Therefore, when the slackened strip 2 is cut by the cutting device 11, the trailing end of the preceding strip 2 and the leading end of the following strip 2 overlap each other, and the leading strip 2 pulls in the following strip 2. The row strip 2 cannot be wound on a winding machine different from that of the preceding strip 2.

Even when the leading strip 2 and the trailing strip 2 do not overlap with each other without sagging, since both of them are moving at the same speed, a reliable gap is not formed at the cutting portion, and the quality of the cutting is judged. There is a drawback that cannot be done.

In view of the above situation, the present invention draws the trailing strip into the leading strip by forming a gap between the trailing end of the leading strip cut by the cutting device and the leading end of the trailing strip. It is an object of the present invention to provide a strip gap forming device capable of preventing the above-mentioned phenomenon and at the same time reliably judging the quality of the cutting.

[0008]

[Means for Solving the Problems] Claim 1 of the present invention
In the invention , the cutting device is provided in the middle of the strip conveying line, the trailing strip feeding device is provided on the entrance side of the cutting device, and the preceding strip retracting device is provided on the exit side of the cutting device. When disconnected, follow
Delay the delivery of the trailing strip tip to the strip delivery device.
The present invention relates to a strip gap forming device including an arithmetic and control unit for sending a control signal to cause the gap.
The invention according to claim 2 of the present invention is
A cutting device is installed in the middle of the transport line, and the entrance side of the cutting device
The trailing strip feeding device is installed in the
Provide a leading strip retractor on the outlet side
When the cutting device cuts, the preceding strip retractor
It is common to send a control signal to accelerate the pull-in of the rear edge of the row strip.
The trailing strip tip to the trailing strip feeding device.
Equipped with an arithmetic and control unit that sends a control signal to delay
Related to a strip gap forming device characterized by:
Is.

[0009]

The operation of the present invention is as follows.

The cutting device provided in the middle of the strip conveying line cuts the strip, and the cut preceding strip is drawn in by the preceding strip drawing device provided on the exit side of the cutting device, and the trailing strip is cut. The trailing strip feeding device provided on the inlet side of the sheet feeds the sheet.

When the strip is cut by the cutting device, the arithmetic and control unit causes the trailing strip feeding device to trail the strip.
Send a control signal to delay the delivery of the tip
Pulling the trailing edge of the leading strip into the leading strip retracting device
To send a control signal to accelerate the
Control signal that delays the delivery of the trailing strip tip
The feeding causes a gap to form between the trailing end of the leading strip and the leading end of the trailing strip.

When a gap is formed between the trailing end of the cut leading strip and the leading end of the trailing strip in this manner, the trailing end of the leading strip and the leading end of the trailing strip are overlapped, and the leading strip is It is possible to prevent the trailing strip from being pulled in, and to reliably wind the trailing strip on a winding machine other than the leading strip.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention.

In the figure, 1 is a rolling mill, 2 is a strip,
4 is a hot run table formed by arranging a large number of table rollers 3, 5 is a line direction, 6 is a cooling zone provided on the outlet side of the rolling mill 1, 7 and 9 are pinch rolls on the winder inlet side,
8 and 10 are winders for the strip 2.

A cutting device 13 such as a shear is provided on the inlet side of the preceding strip retracting device 12 such as the winders 8 and 10 and the pinch rolls 7 and 9 on the inlet side of the winder, and the cutting device is provided on the inlet side of the cutting device 13. A trailing strip delivery device 15, such as the entry side pinch roll 14, is provided.

As shown in FIG. 2, the leading strip retracting device 12 such as the winder inlet side pinch rolls 7 and 9 and the trailing strip feeding device 15 such as the cutting device inlet side pinch roll 14 have upper and lower pinches. It comprises a roller 16, a drive device 18 connected to the pinch roller 16 via a universal spindle 17 and the like, and a clamp force adjusting device 20 such as a lifting cylinder connected to a shaft box 19 supporting the pinch roller 16. ing. Reference numeral 21 is a fluid pressure device of the clamp force adjusting device 20.

Further, as shown in FIG. 1, a gap detector 24 composed of a light projector 22 and a light receiver 23 is provided between the cutting device 13 and the winder entry side pinch roll 7.

Then, as shown in FIG. 3, a strip cutting portion tracking signal 25 from the outside is inputted, a control signal 26 for cutting the strip 2 is sent to the cutting device 13, and a gap detector 24 detects a gap. It has a cutting device control unit 28 for inputting a signal 27 and causing the cutting device 13 to re-cut the strip 2 when necessary, and also inputs the strip cutting unit tracking signal 25 to wind the winders 8 and 10 or A control signal 30 is sent to at least one of the leading strip retracting devices 12 such as the winder inlet side pinch rolls 7 and 9 to accelerate the retracting of the trailing end of the preceding strip 29 , and
A control signal 32 for delaying the delivery of the leading end of the trailing strip 31 is sent to the trailing strip feeding device 15 such as the cutting device input side pinch roll 14 so that the trailing strip 31 is fed between the trailing end of the leading strip 29 and the leading end of the trailing strip 31. An arithmetic and control unit 35 having a gap forming control unit 34 for forming the gap 33 is provided.

Next, the operation will be described.

The process of alternately winding the long strip 2 with the two winding machines 8 and 10 while cutting it with the cutting device 13 is the same as in FIG.

Immediately before the strip 2 is cut, in order to apply a winding tension to the coil 36 being wound, the pinch roll 7 on the winding machine entrance side performs speed control which is more delayed than the line speed. Since the device entrance side pinch roll 14 controls to pull in the strip 2 coming out of the rolling mill 1, the strip 2 between the cutting device entrance side pinch roll 14 and the winder entrance side pinch roll 7 becomes easy to sag. Cage,
When the slackened strip 2 is cut by the cutting device 11, the trailing end of the leading strip 29 and the trailing strip 31 are cut.
Since the leading ends of the trailing strips overlap each other and the leading strip 29 draws in the trailing strip 31, it may not be possible to wind the trailing strip 31 into a winding machine different from the leading strip 29.

Therefore, in the present invention, the rear end of the leading strip 29 and the leading end of the trailing strip 31 are prevented from overlapping with each other as follows.

That is, first, a trailing strip delivery device 15 such as a cutting device entry side pinch roll 14 is provided on the entry side of the cutting device 13 so as to secure the delivery force of the trailing strip 31 after cutting. There is.

When the cutting device control unit 28 receives the strip cutting unit tracking signal 25 from the outside, it sends a control signal 26 to the cutting device 13 to send the strip 2
To disconnect.

At the same time, the gap forming control section 34 inputs the strip cutting section tracking signal 25 to allow the preceding strip retracting devices 12 such as the winders 8 and 10 and the winder inlet side pinch rolls 7 and 9 to operate. Control signal 30 on at least one
The winding machines 8 and 10 and the winding machine inlet side pinch rolls 7,
The driving speed of 9 or the like is increased so that the trailing end of the leading strip 29 is pulled in faster than the feeding of the trailing strip 31.

Usually, both of the winders 8 and 10 and the winder inlet side pinch rolls 7 and 9 are controlled to have a constant drive speed, or one of them is controlled to have a constant drive speed and the other is stripped. Since the tension is controlled to be constant, the drive speed of the device 8, 10 or 7, 9 on the side where the constant drive speed is controlled is temporarily increased.

Further, the gap forming control section 34 inputs the strip cutting section tracking signal 25 and sends a control signal 32 to the succeeding strip sending apparatus 15 such as the cutting apparatus entrance side pinch roll 14 to send the succeeding strip. 31 The delivery of the tip is delayed.

As a method of delaying the delivery of the leading end of the trailing strip 31, a method of temporarily reducing the driving speed of the driving device 18 of the cutting device entrance side pinch roll 14 and a lifting cylinder using the fluid pressure device 21 are used. The clamping force adjusting device 20 is operated to temporarily weaken the clamping force of the cutting device entrance side pinch roll 14, thereby the trailing strip 3
The tension applied to 1 is reduced or eliminated, and the trailing strip 3
There are two methods of elastically shrinking No. 1, and either one may be performed.

By thus speeding up the pulling-in of the trailing end of the preceding strip 29 and delaying the delivery of the leading end of the trailing strip 31, the leading end of the leading strip 29 and the leading end of the trailing strip 31 can be reliably held. A gap 33 is formed in the front end of the trailing strip 29 and the leading end of the trailing strip 31 to prevent the leading strip 29 from being drawn into the trailing strip 31.
Can be prevented from being taken up by a winder different from the preceding strip 29.

Then, the cutting device control section 28 monitors the gap detection signal 27 from the gap detector 24, and when the gap 33 is formed, normally terminates the operation of the cutting device 13 so that the gap 33 is released. If not detected, the cutting device 1
A control signal 26 is sent to 3 to cause strip 2 to be recut.

Further, the gap forming control section 34 continues the above gap forming operation until the rear end of the preceding strip 29 passes through the winder entry side pinch roll 7, and the rear end of the preceding strip 29 is wound. After passing through the take-in side pinch roll 7, the take-up speed of the preceding strip 29 by the take-up machines 8 and 10 is slowed down.

The present invention is not limited to the above-described embodiment, but delays the delivery of the trailing strip tip.
Of course, only the operation to be performed may be performed, and in addition, various changes may be made without departing from the scope of the present invention.

[0034]

As described above, according to the strip gap forming device of the present invention, the gap is reliably formed between the trailing end of the preceding strip and the leading end of the following strip cut by the cutting device. As a result, it is possible to obtain an excellent effect that it is possible to prevent the overlapping of the both and thus to prevent the trailing strip from being drawn into the leading strip.

[Brief description of drawings]

FIG. 1 is an overall schematic side view of an embodiment of the present invention.

FIG. 2 is a view taken along the line II-II of FIG.

FIG. 3 is a control system diagram of FIG.

FIG. 4 is an overall schematic side view of a conventional example.

[Explanation of symbols]

2 strips 5 Transport line direction 12 Leading strip retractor 13 Cutting device 15 Trailing strip delivery device 29 Leading strip 30, 32 control signal 31 trailing strip 33 Gap 35 arithmetic and control unit

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masao Futanda, No. 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawajima-Harima Heavy Industries Co., Ltd. Yokohama No. 2 Factory (72) Hiroaki Kuwano Shin-chu, Isogo-ku, Yokohama-shi, Kanagawa Haramachi No. 1 Ishikawajima Harima Heavy Industries Co., Ltd.Yokohama No. 2 Factory (72) Inventor Soichiro Onda No. 1 Kawasakicho, Chuo-ku, Chiba City, Chiba Prefecture Kawasaki Steel Co., Ltd. Chiba Works (72) Inventor Nobuhiro Ito Central Chiba City, Chiba Prefecture Kawasaki-cho 1-ku Kawasaki Steel Co., Ltd. Chiba Works (72) Inventor Toshio Imaseki 1 Kawasaki-cho Chuo-ku, Chiba City, Chiba Kawasaki Steel Co., Ltd. Chiba Works (56) Reference JP-A-6-182438 (JP, 182438) A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21B 39/00 B21B 15/00 B21C 47/02

Claims (2)

(57) [Claims] 1. A cutting device is provided in the middle of a strip conveying line, a trailing strip feeding device is provided at an entrance side of the cutting device, and a preceding strip drawing device is provided at an exit side of the cutting device, and the strip is a cutting device. When disconnected by
Sending the trailing strip tip to the trailing strip feeding device
A gap forming device for a strip, comprising: an arithmetic and control unit for sending a control signal for delaying . 2. A cutting device is installed in the middle of the strip transportation line.
And a trailing strip feeding device on the entrance side of the cutting device.
And the leading strip retractor on the exit side of the cutting device.
Equipped with a device, when the strip is cut by the cutting device,
Pulling the trailing edge of the leading strip into the leading strip retracting device
To send a control signal to accelerate the
Control signal that delays the delivery of the trailing strip tip
Strip having an arithmetic and control unit for sending
Gap forming device.