JPH04305314A - Method for uncoiling and coiling metal strip - Google Patents

Abstract

PURPOSE:To easily perform visual inspection for scratches and insertion of a protective sheet by passing and reversing a strip so that the lower surface of the strip metal at the time of passing through a device for working strip metal is turned into an upper surface when it passes through a surface inspection device, and the upper surface is turned into the inner surface of a coil when the metal strip is coiled. CONSTITUTION:The strip 1 is uncoiled by an uncoiling machine upward 2 and held horizontally, then, inverted through direction changing feed rollers 3a, 3b to be sent into an annealing furnace 5 and a pickling device 7. Feed rollers 3c, 3d change the direction of the strip 1 again and guide it to a surface inspection table 9. On the surface inspection table 9 the surface easy to be scratched is put upward so as to facilitate inspection and an obserber is easy to operate. In the coiling machine 11, the upper surface is made to come to the inner surface coil so that a protection sheet delivered from a payoff reel 12 is easy to be clamped.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for unwinding and winding a metal strip, and more particularly to a method advantageously adapted to continuous processing of a metal strip in a steel strip treatment facility equipped with an annealing furnace or a pickling device.

0002

2. Description of the Related Art FIG. 2 shows a conventional steel strip surface treatment line equipped with an annealing furnace and a pickling device. The unwinding and winding of the metal strip in this line is carried out as follows. ing. First, the metal strip (hereinafter simply referred to as "strip") 1 unwound from the unwinding machine 2 is sent by the feed roller 3 to the welding machine 4, where it is welded to the tail end of the preceding strip. After welding, the strip 1 passes through an annealing furnace 5 and a pickling device 7 to remove oxidized scale attached to the surface of the strip to make the surface of the steel plate beautiful. Then, the surface is inspected on a surface inspection table 9, and then a predetermined The coil is cut with a dividing shear 10 to have a coil length of
I try to wind it up.

According to this conventional unwinding and winding method, when a stainless steel or aluminum plate is required to have a beautiful surface when being wound by the winding machine 10, the surfaces of the strips rub against each other and scratches occur. Usually, a protective sheet (also called interleaving sheet) 13 is sandwiched between them to prevent the paper from being damaged.The paper payoff reel 12 shown in the figure is
It is for playing out 3. As an example of winding up a protective sheet at the same time as winding up a strip, a method as disclosed in Japanese Patent Application Laid-Open No. 78062/1983 has been proposed.

0004

However, the method for unwinding and winding a strip according to the above-mentioned prior art has the following problems. That is, in the case of this prior art, since the conveyor roll is located on the lower surface (back surface) side of the conveyor strip in the annealing furnace 5 where defects are most likely to occur in the line, the visual inspection on the surface inspection table 9 is performed on the lower surface. It has to be the center. However, this inspection of the bottom surface of the strip involves looking up at the strip from below, which forces the worker into a strained working posture, which poses health problems and makes it difficult to conduct detailed inspections.

[0005] Moreover, in the unwinding and winding system under this prior art, it is not possible to guarantee the top surface of the strip in the next process. That is, in order to guarantee the top surface with the equipment arrangement shown in FIG. 2, the winding direction of the tension reel needs to be upward winding, in which the steel plate is wound from above, as shown in the boxed diagram in FIG. By the way, in order to prevent scratches on the surface during winding, it is necessary to sandwich a protective sheet 13 such as kraft paper or vinyl between the boards being wound, but in the case of such conventional methods, this protective sheet It is extremely difficult to insert the sheet at the beginning of the strip.

The object of the present invention is to overcome the drawbacks and problems of the prior art mentioned above.

[0007]

[Means for Solving the Problems] As a result of intensive research aimed at achieving the above-mentioned object, the inventors of the present invention have devised a method for surface treatment and surface inspection of a metal strip fed out from an unwinding machine, and then passing it through a winding machine. In a series of steps for winding the strip, first, the strip fed out from the unwinding machine is reversed via a feed roller. This allows the surface of the strip that was initially on the top surface to face the bottom surface when it is passed through for surface treatment. Thereafter, when the strip is passed for surface inspection, this strip is turned over again via a feed roller and returned to its original position to form the upper surface. Then, during winding, the upper surface becomes the inner surface of the coil winding, so that the wound part of the strip is opened upward, and the protective sheet is continuously inserted from above, and the strip is unwound. I figured out how to do it. According to such a method, inspection becomes easy, and at the same time, it becomes easy to insert the protective sheet during winding, and it is possible to manufacture a strip coil with excellent surface properties.

[0008] In carrying out the above-mentioned rewinding and winding method, it is necessary to arrange the rewinding machine and the winding machine in the same area to facilitate monitoring of both, and the unwinding machine,
By making the pass in the middle of the winding machine a reversal (folding) pass, the strip being threaded is located at the bottom of the annealing furnace and pickling equipment, but the strip is placed on the surface inspection table located downstream of these. Now, each equipment is arranged so that it is located on the top surface again.

[0009]

[Function] According to the present invention, since the rewinding machine and the winding machine are arranged back to back in the same area (the range where both can be monitored from the operation room) and there is a folding path,
The upper surface of the rewound strip is the contact surface with the rolls in the annealing furnace and pickling equipment, where defects are most likely to occur in the line, that is, the lower surface of the strip. Since the easy surface becomes the upper surface again, inspection for defects in the annealing and pickling line becomes extremely easy. In addition, on the winding machine side, the winding part of the strip is opened upward (the winding direction is downward).
Since the winding operation can be carried out in the same manner, it becomes easy to insert (insert) the so-called protective sheet, and when sending the coil to the next process, the surface with fewer flaws on the strip surface can be used as the surface.

0010

[Example] A preferred embodiment of the method of the present invention will be explained with reference to FIG. FIG. 1 shows the arrangement of winding and unwinding machines in an annealing and pickling line back to back, and the unwinding machine 2 side unwinds the strip 1 by upper winding, and the winding machine 11 side unwinds the strip by lower winding. The path of this strip 1 is an example of a folded path configuration.

In FIG. 1, a strip 1 unwound from an unwinding machine 2 is held horizontally and then passed through a welding machine 4.
Welding is performed between the tail end of the leading steel strip and the tip of the trailing steel strip. Next, this strip 1 is reversed via direction changing feed rollers 3a, 3b and fed into an annealing furnace 5. As a result, the upper surface of the strip 1 when it is unwound is on the lower surface side when it reaches the annealing furnace 5. In this annealing furnace 5, the strip 1 is heated at a high temperature (approximately 1100°C).
), the strip 1 is supported by an in-furnace support roll 6 made of asbestos, etc.; 1 is easy to damage.

Next, on the exit side of the annealing furnace 5, a pickling device 7 is installed for chemically and electrically removing oxide scale generated on the strip surface by atmospheric annealing. Similar to the annealing furnace 5, this pickling device 7 is provided with an in-tank support roll 8, which supports the strip 1. Thereafter, this strip 1 is pickled in a pickling device 7 to remove scale, and then washed with water.
After drying (not shown), the feed rollers 3c, 3
The direction is changed again by d and guided to the surface inspection table 9. After this inspection, the strip is cut by a dividing shear 10 and wound into a coil by a winder 11 in order to obtain a predetermined coil length. At this time, the upper and lower surfaces of the strip 1 are reversed by the feed rollers 3c and 3d. The purpose is to flip it so that it is facing upward. This makes it extremely easy for an observer to see the state of flaws on the strip surface, making it easier to find flaws.

[0013] Also, on the winding machine 11 side, stainless steel,
When winding a coil such as aluminum, in which surface properties such as surface gloss are important, the protective sheet 13 is continuously sandwiched and wound into a coil shape.
can be sandwiched between the top-opening windings of the bottom-wound coil, making this task extremely easy.

[0014]

[Effects of the Invention] As explained above, according to the method of the present invention, the contact surface side of the transport roll, which is most prone to scratches in the line, is fixed to the upper surface in the inspection section, unwinding section, and winding section. This makes it easier to visually inspect defects, and at the same time prevents defects from being overlooked. Furthermore, since this method winds the coil in the downward winding position, it is easy to insert the protective sheet into the coil winding part, and furthermore, when the wound coil is processed in the next process such as a shearing line, there are no defects. This has the effect of making it easier to inspect in the next process because the surface with the least amount of damage, that is, the guaranteed surface, can be the top surface.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the annealing and pickling tank equipment of the present invention.

FIG. 2 is a schematic diagram of conventional annealing and pickling tank equipment.

[Explanation of symbols]

1 Strip 2 Rewinding machine 3~3e Feed roller 4 Welding machine 5 Annealing furnace 6 Furnace support roll 7 Pickling equipment 8 Roll inside pickling tank 9. Examination table 10 Split shear 11 Winding machine 12 Pay-per-payoff reel 13 Protective sheet

Claims (1)

[Claims] Claim 1: In a series of steps in which a metal strip unwound from an unwinding machine is subjected to surface treatment and surface inspection, and then wound up with a winding machine, the unwinding metal strip is reversely threaded through a feed roller. When passing the steel strip through the equipment to be processed, the steel strip is passed so that the bottom surface is facing, and then, when passing through the surface inspection equipment, the strip is reversely passed through the feed roller so that the bottom surface becomes the top surface, and then the winding is carried out. When taking the strip, make sure that the top surface of the threaded strip becomes the inside surface of the coil winding, and at the same time, support the coil winding part of the winding machine so that it opens upward and winds downward, and the protective sheet is continuously applied here. A method for unwinding and winding a metal strip, which is characterized by winding the metal strip while pinching the strip.