JP2692527B2 - Method for manufacturing coil with reader strip and equipment therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous annealing pickling equipment for hot rolled stainless steel sheets or a method for producing a coil with a leader strip in the continuous pickling equipment and the equipment therefor.

[0002]

2. Description of the Related Art In the case of a hot-rolled stainless steel sheet, annealing and pickling of a hot-rolled coil is generally performed by a continuous annealing pickling facility (usually called an AP line) for continuously processing the annealing and the pickling process, or separate annealing. It is carried out in a continuous pickling facility in which continuous pickling is performed after the process. The hot-rolled stainless steel sheet that has been subjected to annealing and pickling in this facility is rolled by a rolling mill dedicated to stainless steel called a Zenzimer mill. The part wound on the left and right reels (approximately 10 m on one side) cannot be rolled.
0m is wasted. In order to eliminate this waste and enable rolling over the entire length of the coil, a method is used in which a leader strip (about 10 m) is joined before and after the coil and rolled.

That is, in the case of hot rolled stainless steel sheet,
After joining the leader strips to the top and bottom of the coil, the coil is carried into a continuous annealing pickling equipment or a continuous pickling equipment, and after the annealing pickling treatment, it is carried into a Zenzimer mill rolling step and cold rolled.

FIG. 3 is a schematic view showing an example of the equipment layout of the conventional leader strip joining equipment and the hot-rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment, where 1 is for annealing pickling or pre-pickling treatment. In-process coil yard, 2 leader strip joining equipment, 3 leader strip joining cab, 6 continuous annealing pickling equipment or continuous pickling equipment for hot rolled stainless steel sheet, 7 for annealing pickling equipment or continuous pickling equipment Cab,
Reference numeral 8 denotes an in-process coil storage for annealing pickling or pickling.

That is, in the conventional equipment, the leader strip joining equipment 2 and the hot-rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment 6 are installed separately, and an annealing pickling or pickling pretreatment coil is used. The stainless hot-rolled coil carried into the leader strip joining equipment 2 from the storage 1 is rewound from the payoff reel 2-1 of the joining equipment, and the leader strip supplied to the leader strip supply table 2-2 is welded to the welder 2-3. After welding on the top and bottom and winding on the tension reel 2-4,
It is once transported to the in-process coil storage 8 for annealing pickling or pickling, and then carried into the continuous annealing pickling facility or the continuous pickling facility 6 of a hot rolled stainless steel sheet by an overhead crane or the like. The coil that has been subjected to the continuous annealing pickling or the continuous pickling treatment in this equipment is carried into the next Zenzimer mill rolling step by a crane or the like and cold rolled (reverse rolling) is performed.

[0006]

However, the above-mentioned conventional leader strip joining equipment and the hot-rolled stainless steel plate continuous annealing pickling equipment or continuous pickling equipment arrangement row have the following problems. That is, since the leader strip joining equipment and the hot-rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment are conventionally configured on separate lines, the amount of coils transported between the equipment is large and overhead cranes, etc. The need for cabs and workers for separate installations, rewinding with tension reels to join the leader strip to the top and bottom of the coil, and coil winding. In some cases, defects are inevitable and the cycle time loss (coil winding time) is large. In addition, since a dedicated coil storage space is required for each facility, a large space must be secured. Further, there is a problem that the pretreatment capability of the continuous annealing pickling or the continuous pickling of the hot-rolled stainless steel sheet is low due to these problems. Further, in the continuous pickling equipment, the number of steps increases because the annealing equipment is separate.

[0007] Japanese Patent Application Laid-Open No. 4-84605 discloses that
A method of manufacturing a leader strip hot rolled steel sheet is disclosed. This method is characterized in that ordinary steel sheets are connected to the top and bottom of a stainless steel sheet, hot endless rolling is performed, and then the ordinary steel sheet is divided into a leader strip. However, if the hot-rolled stainless steel coil using ordinary steel for the leader strip is treated in the hot-rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment, the temperature inside the furnace is as high as 1300 ° C, so it will be blown with ordinary steel. Ordinary steel cannot be applied to the leader strip of the hot-rolled stainless steel coil because the ordinary steel may melt even in the scale treatment during pickling. Furthermore, hot endless rolling is impossible with a general non-endless hot rolling mill, and it is not easy to put the rolling mill into practical use because the rolling mill must be significantly remodeled and the cost is enormous.

The present invention has been made in order to solve the problem of the conventional equipment in which the leader strip joining equipment and the hot-rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment have separate line configurations, respectively. Improving the pretreatment capacity of the hot rolled stainless steel coil by arranging the leader strip joining equipment having the leader strips on the top and bottom of the steel sheet in the hot-rolled stainless steel sheet continuous annealing pickling line or in the continuous pickling line in-line, An object of the present invention is to propose a manufacturing method of a coil with a reader strip and its equipment for simplification and efficiency improvement of the equipment.

[0009]

SUMMARY OF THE INVENTION The present invention precedes a leader strip for a coil top on a coil top in a leader strip joining facility in a continuous annealing pickling line for a hot rolled stainless steel plate or a preceding step of the continuous pickling line. Leader strips for coil bottom are continuously joined, the coil with leader strip is carried into a continuous annealing pickling line or a continuous pickling line, the leader strip for preceding coil bottom is joined to the bottom of the preceding coil, and continuous annealing acid is used. A method for manufacturing a coil with a leader strip is characterized in that after the washing or the continuous pickling, the joint portion between the leader strip and the leader strip is cut to obtain a coil having a leader strip at the top and bottom of a steel plate. It is a thing.

As equipment for carrying out this method, a coil is partially rewound from the pay-off reel before the continuous annealing pickling equipment for a hot-rolled stainless steel plate or a continuous pickling equipment, and a predetermined length is placed on the top of the coil. Leader strip joining equipment for continuously joining two leader strips and winding them again on a payoff reel, and a coil arranged between the leader strip joining equipment and the hot-rolled stainless steel plate continuous annealing pickling equipment or between continuous pickling equipment The automatic carrier, the leader strip joining equipment and the common operating room of the hot-rolled stainless steel sheet continuous annealing pickling equipment or the continuous pickling equipment, the continuous annealing pickling equipment outlet side or the continuous pickling equipment outlet side, said leader strip And a leader machine for cutting the joint portion of the leader strip and the leader strip joining equipment. Le, comprising a welder and leader strip feed table, it is an gist manufacturing facilities of the reader coil with the strip, characterized in that has no tension reel.

[0011]

The hot-rolled stainless steel coil carried into the leader strip joining equipment by a crane is connected to the leader strip of about 10 m continuously on the coil top at the equipment and wound on the pay-off reel again. Automatically conveyed to continuous annealing pickling equipment or continuous pickling equipment. It is also possible to use one leader strip having the length of the above two sheets (about 20 m).

In the hot-rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment, a leader strip is joined to the bottom of the preceding coil to perform continuous annealing pickling treatment or continuous pickling treatment. Since the joint portion between the leader strip and the leader strip is cut on the side or on the outlet side of the continuous pickling equipment, the leader strip is joined to the top and bottom of the coil.

Since a continuous line can be provided between the leader strip joining equipment and the hot-rolled stainless steel sheet continuous annealing pickling equipment or between the continuous pickling equipment through an automatic coil feeding device such as a coil car, coil feeding between the two equipment is possible. Can be performed efficiently in a short time. In addition, the operation room of the leader strip joining equipment and the hot-rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment can be shared, and the in-process coil storage area for annealing pre-pickling or pre-pickling treatment and the annealing pickling are also available. The in-process coil storage space for processing or pickling can be shared.

In the leader strip joining equipment, a welder is arranged between the pay-off reel and the leader strip supply table, and the leader strip is attached to the top of the coil.
The tension reel can be omitted because the pieces are joined and wound up on the payoff reel again.

By making the leader strip joining equipment in-line with the hot-rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment, the equipment can be rationalized, the processing capacity can be greatly improved, and the product quality can be improved.

[0016]

FIG. 1 is a schematic view showing a facility arrangement row of a leader strip joining facility and a hot-rolled stainless steel sheet continuous annealing pickling facility or a continuous pickling facility in one embodiment of the present invention.
Is an in-process coil storage space, 12 is a leader strip joining facility,
13 is a driver's cab, 14 is a hot-rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment, 15 is an automatic coil transfer device,
16 is a cutting machine. Further, FIG. 2 is a schematic view showing a manufacturing process of a coil with a leader strip in the above equipment, and (A) is a leader strip joining equipment in which a first leader strip is joined to the top of the coil by a welder. The state, (B) is the state where the second leader strip is also joined by the welder, (C)
Is a coil in which two leader strips are joined to the top of the coil, and (D) is a continuous annealing pickling equipment for hot rolled stainless steel sheet or a leader strip of a succeeding coil is joined to the bottom of the preceding coil in the continuous pickling equipment. The state of
(E) shows a state where two leader strips are separated by a cutting machine at the exit side of the hot-rolled stainless steel sheet continuous annealing pickling equipment or the continuous pickling equipment, respectively, 17 is a coil, 18
-1, 18-2 are leader strips.

The leader strip joining facility 12 includes payoff reel 12-1, leveler 12-2, shear 12-.
Reference numerals 3 and 12-4 are notches, 12-5 is a beat grinder, 12-6 is a welder, and 12-7 is a leader strip supply table.

The automatic coil conveying device 15 is arranged between the leader strip joining equipment 12 and the hot-rolled stainless steel sheet continuous annealing pickling equipment or the continuous pickling equipment 14, and the coil with the leader strip is hot-rolled stainless steel sheet continuous annealing pickling equipment. Alternatively, a device that automatically conveys to a continuous pickling facility, such as a coil car or a walking beam, is used.

In the above equipment, the coil-in-process storage 11
The hot rolled stainless steel coil carried into the leader strip joining facility 12 by an overhead crane or the like is inserted into the payoff reel 12-1 via a walking beam or the like and skids. Here, the coil is partially unwound and the shape is corrected by the leveler 12-2.
After the tip is cut at 3, the welder 12-6 joins the two leader strips to the coil top, and the notcher 12-4 and the beat grinder 12 are joined.
Multiply by -5 and wind up on the payoff reel 12-1.

As shown in FIG. 2, the leader strip is joined to the top of the coil 17 at the welder 12-6 by a leader strip 18 of a predetermined length (about 10 m).
-1 is joined (Fig. A), and a leader strip 18-2 of the same length is joined to this leader strip (Fig. B).
Then, the pay-off reel 12-1 is wound again (FIG. C).
After that, the coil is carried into the hot-rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment 14 by the automatic coil conveying device 15, is inserted into the payoff reel 14-1 of the equipment, and is welded to the preceding coil 17 by the welder 14-2. The leader strip 18-2 is joined to the bottom (FIG. D), and continuous annealing pickling or continuous pickling is performed. The coil subjected to the annealing pickling or the pickling is treated by the cutting machine 16 arranged on the exit side of the continuous annealing pickling equipment or the continuous pickling equipment 14 so that the two leader strips 18-1 and 18-2 are It is separated at the joint and wound separately. Therefore, the leader strip 18-1 is joined to the top of the coil subjected to the continuous annealing pickling or the continuous pickling, and the leader strip 18-2 is joined to the bottom of the coil. It should be noted that only one leader strip may be joined to the top of the first preceding coil at the start of operation.

Example 1 The coil shown in Table 1 was treated by the equipment of the present invention shown in FIG. 1 and the conventional equipment shown in FIG. The capacity is shown in comparison with Table 4.

According to the main specification data of Table 2, in the case of the leader strip joining equipment of the present invention, the rewinding time of the coil is about 50 sec, which is much shorter than the conventional equipment of about 600 sec, and due to automation, the cycle The time was significantly shortened to 690 seconds compared to the conventional 2820 seconds. As a result, the AP line (hot-rolled stainless steel sheet continuous annealing pickling equipment) shown in Table 3 can be synchronized with a cycle time of 900 sec, and the leader strip joining equipment can be inline.

On the other hand, the conventional equipment cannot synchronize the cycle time with the AP line, and three leader strip joining equipments are required to support the AP line having a capacity of 60T / hr. Even if the conventional leader strip joining equipment is automated in the same manner as the in-line leader strip joining equipment of the present invention, the cycle time is 1240 sec, and it is impossible to deal with the AP line.

[0024] Moreover, the common use of the in-process coil storage area results in 3
The space for 00 coils (1200 m ² ) can be reduced,
In addition, the use of a common cab reduced the number of operating personnel from four to two.

[0025]

[Table 1]

[0026]

[Table 2]

[0027]

[Table 3]

[0028]

[Table 4]

[0029]

As described above, according to the present invention, the following effects can be obtained. By introducing inline leader strip joining equipment to the hot-rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment, (1) coils can be transferred between the two equipment efficiently and in a short time by an automatic transfer device such as a coil car. (2) The operation room of the leader strip joining equipment and the hot-rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment can be shared, and the in-process coil storage area for pre-annealing pickling treatment or continuous pickling treatment is available. And the in-process coil storage area for annealing pickling treatment or pickling treatment can be shared, resulting in rationalization of equipment, reduction of work personnel and space, and as a joining means of leader strip, (3) coil Tension reel for rewinding by adopting a method in which two leader strips are joined to the top of the It is not necessary, the leader strip joining equipment can be simplified, the occurrence of flaws due to coil winding can be greatly reduced, and the effects of (4) and above improve the coil processing capacity and product quality, and the hot rolled stainless steel can be used. It has a great effect on the manufacture of a coil with a steel sheet leader strip.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a facility strip arrangement of a leader strip joining facility and a hot-rolled stainless steel sheet continuous annealing pickling facility or a continuous pickling facility according to an embodiment of the present invention.

FIG. 2 is a schematic view showing a manufacturing process of a coil with a leader strip in the above equipment, where (A) is a state in which the first leader strip is joined to the top of the coil by a welder in the leader strip joining equipment. , (B)
Is a state in which a second leader strip is also joined by a welder, (C) is a coil in which two leader strips are joined to the top of the coil, and (D) is a hot-rolled stainless steel sheet continuous annealing pickling In the equipment or the continuous pickling equipment, the leader strip of the trailing coil is joined to the bottom of the preceding coil, (E) shows two sheets of hot rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment The state where the leader strip is separated by the cutting machine is shown.

FIG. 3 is a schematic view showing an example of an equipment arrangement row of a conventional leader strip joining equipment and a hot-rolled stainless steel plate continuous annealing pickling equipment or a continuous pickling equipment.

[Explanation of symbols]

11 In-process coil storage area 12 Leader strip joining equipment 12-6 Welder 12-7 Leader strip supply table 13 Operator's cab 14 Hot rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment 15 Automatic coil carrier 16 Cutting machine 17 Coil 18- 1, 18-2 Leader strip

Claims (3)

(57) [Claims] 1. A leader strip for a coil top and a leader strip for a preceding coil bottom are continuously connected to the top of a coil in a leader strip joining facility in the preceding step of a hot-rolled stainless steel sheet continuous annealing pickling line or a continuous pickling line. And the coil with the leader strip is carried into a continuous annealing pickling line or a continuous pickling line, the leader strip for the preceding coil bottom is joined to the bottom of the preceding coil, after the continuous annealing pickling or after the continuous pickling, A method for producing a coil with a leader strip, comprising cutting a joint between the leader strip and the leader strip to obtain a coil having a leader strip at the top and bottom of a steel plate. 2. A hot-rolled stainless steel sheet continuous annealing pickling equipment or a preceding stage of a continuous pickling equipment, in which a coil is partially rewound from a pay-off reel and two leader strips of a predetermined length are continuously provided on the top of the coil. Leader strip joining equipment for joining and rewinding on a pay-off reel, automatic coil conveying device arranged between the leader strip joining equipment and hot-rolled stainless steel sheet continuous annealing pickling equipment or continuous pickling equipment, leader strip joining equipment and heat A common operating room for continuous annealed pickling equipment or a continuous pickling equipment, and a cutting machine arranged on the outlet side of the continuous annealing pickling equipment or on the outlet side of the continuous pickling equipment to cut the joint portion of the leader strip and the leader strip A manufacturing facility for a coil with a reader strip, which is characterized in that: 3. The equipment for manufacturing a coil with a leader strip according to claim 2, wherein the leader strip joining equipment includes a payoff reel, a welder, and a leader strip supply table, and does not have a tension reel.