JPH09150201A - Continuous sheet processing facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To complete the technique of conventional width control applicable in a continuous sheet processing facility in which a metallic sheet is welded on is way of a line and continuously run. SOLUTION: In the continuous sheet processing facility which is provided with a pay-off reel 1, welder 5, looper 6 and processing device 10 to process by continuously running thin metallic strip 2, a tension imparting device 7 for imparting a specified tension to the thin metallic strip 2 in continuous running is provided on the downstream side of the looper 6. A width controller 8 for controlling the width size of the metallic strip by changing the tension with respect to the width direction to the thin metallic strip 2 to which tension is imparted with a tension imparting device 7 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin plate continuous treatment facility for continuously traveling a thin metal strip for pickling and cold rolling.

[0002]

2. Description of the Related Art Usually, the width of a hot coil used for cold rolling is the width of cold rolled product + the width of shrinkage in annealing (in particular, CAL (continuous annealing line)) + the width of cold rolling in tandem + the width of cold rolling trim. + Made of hot rolled mill margin.
Here, the hot rolling mill margin is an extra width provided to prevent a negative width due to width variation during hot rolling, and is about 5 to 10 mm depending on the coil size.
The cold-rolled trim allowance is an extra width provided for stably performing edge trimming, and it is required to be about 10 to 15 mm in a normal trimming equipment.

In many cases, the total width of the hot-rolled mill margin and the cold-rolled trim allowance is trimmed at the entrance side of the pickling line to be scrap, resulting in a large yield loss. Further, even if the trimming is not performed on the pickling line, the trimming is finally performed on the delivery side of the CAL (continuous annealing line) or the trimming line, and similar yield loss occurs.

On the other hand, in recent years, the user's needs for plate width accuracy are increasing more and more. Especially, in the case of a plated steel plate or a color coated steel plate, if the trimming is performed after the surface treatment, rust is easily generated from the end face where the base metal is exposed. In the pickling and cold rolling processes before surface treatment, high width accuracy is required. To meet these demands, an edge cutting device called an edge mirror has been devised as a technique for reducing the cold rolling trim margin.
Stable edge cutting is possible even with a margin of less than mm.
However, on the contrary, the fluctuation of the hot coil width is 5
When it is as large as 10 mm, the cutting amount becomes extremely large, which is rather a costly and inefficient method, and there is a problem that the characteristics of the edge mirror cannot be exhibited.

Therefore, as a solution to such a problem, the technique described in Japanese Patent Publication No. 7-4605 is known. In this conventional technique, a tension is applied in the longitudinal direction of the metal strip, and the tension is changed in the width direction of the metal strip to change the width dimension of the metal strip.

[0006]

By the way, in the conventional pickling and cold rolling equipment, batch processing for each coil has been the mainstream. However, in recent years, a continuous process has been performed in which a metal strip is welded and a plurality of coils are continuously flowed. Then, it was considered to apply the technique described in the above-mentioned conventional Japanese Patent Publication No. 7-4605 to recent thin plate continuous processing equipment.

However, in the above-mentioned conventional apparatus, the means for applying the tension to the metal strip is composed of the tension reel and the pinch roll. However, there is a problem that the tension becomes zero and the plate width cannot be controlled when welding is performed, and this prior art cannot be immediately applied to the continuous processing equipment.

Therefore, an object of the present invention is to make it possible to apply the above-mentioned conventional plate width control technology to a thin plate continuous processing facility in which metal plates are welded in the middle of a line and continuously flowed.

[0009]

In order to achieve the above object, the present invention takes the following measures. That is, the feature of the present invention is that in a thin plate continuous processing facility equipped with a pay-off reel, a welding machine, a looper, and a processing device in order to continuously process and process the thin plate metal strip, the downstream side of the looper Is provided with a tension applying device for applying a predetermined tension to the continuously running thin sheet metal strip, and the tension is applied to the thin sheet metal strip to which the tension is provided by the tension applying device in the sheet width direction. By changing
A plate width control device for controlling the width dimension of the metal strip is provided.

The tension applying device is composed of a bridle roll which is forcibly driven. The processing device is a pickling device or a cold rolling device. The plate width control device includes a tool arranged in a staggered pattern above and below the metal strip and having a step in the width direction of the metal strip, and a pushing means for adjusting the relative pushing amount of the upper and lower tools.

According to the present invention, when the leading coil and the trailing coil are welded to be continuous, the running of the metal strips upstream of the looper is stopped. The tension of the metal strips at these portions is zero. It is said that. . However, on the downstream side of the looper, the metal strip continuously travels and is processed by the processing device. Further, in the present invention, since the tension applying device and the plate width control device are provided on the downstream side of the looper in which the metal strip is continuously running, the tension is constantly applied without being affected by the welding work of the coil. It can be applied and the plate width can be continuously controlled.

The principle of the plate width control is as follows.
That is, with respect to the thin metal strip to which the tension is applied by the tension applying device, by changing the tension in the plate width direction, a shearing force along the longitudinal direction is generated in the metal strip,
Due to the shear strain due to the shearing force, a width shrinkage phenomenon occurs. Therefore, the plate width can be controlled by experimentally or analytically obtaining the relationship between the shrinkage amount and the change in tension and changing the tension.

[0013]

1 shows a continuous pickling equipment, in which a thin metal strip 2 fed from a payoff reel 1 comprises a leveler 3, a first shear 4, a welding machine 5, and a first looper. 6, tension applying device 7, plate width control device 8, mechanical descaler 9, pickling device 10 as a processing device, water washing device 11, dryer 12, second looper 13, second shear 14 and by a coiler 15. It is configured to be wound up.

In this continuous pickling equipment, when the preceding coil of the pay-off reel 1 disappears, the metal strip 2 of the next trailing coil prepared for the pay-off reel 1 is supplied to the leveler 3 and the leading metal strip 2 is fed. The end and the tip of the trailing metal strip 2 are welded by the welding machine 5 and made continuous so that the metal strip 2 continuously runs at a constant speed between the first looper 4 and the second looper 13. Has been done.

FIG. 2 shows the details of the tension applying device 7 and the plate width control device 8. In the figure, the tension applying device 7 comprises a first tension bridle roll device 16 on the upstream side and a second tension bridle roll device 17 on the downstream side. Each of the tension bridle roll devices 16 and 17 has four driving rolls 18, and a metal band 2 is wound around each roll 18 to prevent slippage, and the first and second tension bridle roll devices are provided. A predetermined tension is applied to the metal band 2 between the first and second tension bridle roll devices 16 and 17 by making the rotational speeds of the drive rolls 16 and 17 different from each other.

The first tension bridle roll device
A tensiometer 19 for measuring the tension of the metal strip 2 acting between the drive roller 18 on the most downstream side of 16 and the drive roller 18 on the most upstream side of the second tension bridle roll device 17 is provided. An arithmetic processing device 20 is connected to the tensiometer 19, and the tension of the metal strip 2 measured by the tensiometer 19 is fed back to the arithmetic processing device 20.

The plate width control device 8 includes the first and second
It is arranged between the tension bridle roll devices 16 and 17. This plate width control device 8 includes two tools 21 arranged on the upper side of the metal strip 2 and one tool 21 arranged on the lower side thereof.
And a pair of upper and lower pinch rolls on the downstream side.
With 22. A width gauge 23 for measuring the width of the metal strip 2 is provided on each of the entrance side and the exit side of the plate width control device 8.
The width meter 23 is connected to the arithmetic processing unit 20.

The intermesh (pushing) of each tool 21 can be changed by the pushing device 24. The pushing device 24 is the arithmetic processing device 20.
And the pushing amount of each tool 21 is controlled by a command signal from the processing device 20. The shape of the tool 21 is shown in FIG. This tool 21 is a metal strip 2
The width of the widthwise position of the metal band 2 can be changed by pressing the metal band 2 against the tool 21 by making the diameter of the part where both ends of the width direction come into contact is large and the center part of the part is small. It is said that. The tool 21 may be rotatable or non-rotatable.

The plate width control of the metal strip 2 by the plate width control device 8 is performed in accordance with the deviation between the actual width measured by the width gauge 23 arranged on the upstream side and the downstream side of the tool 21 and the target width. twenty one
It is performed by controlling the tension between the first and second tension bridle roll devices 16 and 17 installed on the upstream side and the downstream side and / or controlling the intermesh of each tool 21. FIG.
3 is an example showing a plate width control effect by the plate width control device 8. According to the figure, it can be seen that the plate width variation existing in the hot coil after hot rolling becomes a substantially uniform plate width after passing through the plate width control device 8.

Needless to say, even more excellent plate width accuracy can be obtained by using an edge mirror after forming such a uniform plate width. On the contrary, for steel types, sizes, etc., where defects that cause plate rupture such as saw edges are likely to occur in hot rolling, if profile cutting is performed by an edge mirror on the entry side of the plate width control device, The edge part becomes sound, and the plate width can be controlled without risk of plate breakage.

In FIG. 5, a tension applying device 7 and a plate width control device 8 are provided on the downstream side of the pickling device 10 as a processing device and on the upstream side of the second looper 13, and other components are provided. The structure is the same as that of FIG. What is shown in FIG.
The thin plate continuous processing equipment when the cold-rolled tandem mill 25 is provided as a processing apparatus is shown.

In this equipment, the thin metal strip 2 fed from the payoff reel 1 is used as a first shear 4, a welding machine 5, a looper 6, a first tension bridle roll device 16, a plate width control device 8 and a cold rolled tandem mill. The coiler 15 is configured to be wound up through the 25 and the second shear 14. In this case, the first tension bridle roll device 16
Since it is possible to apply tension to the metal strip 2 by means of the cold rolling tandem mill 25 and the cold rolling tandem mill 25, the second tension bridle roll device can be omitted. However, the 2nd tension bridle roll device was installed in the cold rolling tandem mill.
It is also possible to provide it on the upstream side of 25.

FIG. 7 shows a thin plate continuous processing facility in which a pickling device 10 and a cold rolled tandem mill 25 are arranged in series as a processing device. The strip width control device 8 is arranged between the second looper 13 and the cold rolling tandem mill 25. Other configurations are substantially the same as those described above. The present invention is not limited to the embodiments shown in the drawings, and other devices can be adopted as the processing device. The tension applying device and the plate width control device may be installed at any positions as long as the metal strip is continuously running.

[0024]

According to the present invention, it is possible to control the strip width of a continuously running metal strip in a thin strip continuous processing facility.

[Brief description of the drawings]

FIG. 1 is a line configuration diagram of a thin plate continuous processing facility according to the present invention.

FIG. 2 is a detailed view of a tension applying device and a plate width control device.

FIG. 3 is a front view of a special roll.

FIG. 4 is a graph showing the effect of the present invention.

FIG. 5 is a line configuration diagram of another thin plate continuous processing facility according to the present invention.

FIG. 6 is a line configuration diagram of another thin plate continuous processing facility according to the present invention.

FIG. 7 is a line configuration diagram of another thin plate continuous processing facility according to the present invention.

[Explanation of symbols]

 1 Payoff Reel 2 Metal Band 5 Welding Machine 6 First Looper 7 Tensioning Device 8 Plate Width Control Device 10 Processing Device (Pickling Device) 16 First Tension Bridle Roll Device 17 Second Tension Bridle Roll Device 21 Tool 24 Pushing Device 25 Processing equipment (cold rolling tandem mill)

Claims (5)

[Claims] 1. A thin plate continuous processing facility equipped with a payoff reel, a welding machine, a looper, and a processing device for continuously running and processing a thin metal strip, wherein the continuous running is performed downstream of the looper. A tension applying device for applying a predetermined tension to the thin sheet metal strip is provided, and for the thin sheet metal strip to which the tension is applied by the tension applying device, by changing the tension in the plate width direction, A thin plate continuous processing facility comprising a plate width control device for controlling the width dimension of the metal strip. 2. The thin plate continuous processing facility according to claim 1, wherein the tension applying device comprises a bridle roll which is forcibly driven. 3. The thin plate continuous processing facility according to claim 1, wherein the processing device is a pickling device. 4. The thin plate continuous processing facility according to claim 1, wherein the processing apparatus is a cold rolling apparatus. 5. The plate width control device is arranged above and below the metal band in a zigzag manner, and has a step having a step in the width direction of the metal band, and a pressing force for adjusting the relative pressing amount of the upper and lower tools. The thin plate continuous processing equipment according to claim 1, characterized in that it comprises a means.