JPH105811A - Rolling equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling equipment with which rolling from rough rolling to finish rolling is executable with the small number of mills, the compaction of which is possible by remarkably shortening the entire length, which is capable of continuous high-speed rolling and whose productivity is high. SOLUTION: An insulating/heating coiler 12 is arranged in an adjacent relation to a rolling mill 11 and in series to it. This insulating/heating coiler with which a steel sheet to be rolled with the rolling mill is passabble through as it is or coiling and recoiling are enabled, which is provided with a coiling shaft 12a and made so as to enable high-speed coiling without bending the tip part of the steel sheet. Thus, rolling is executed while coiling and recoiling the steel sheet with the insulating/heating coiler 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot rolling equipment, and more particularly, to a continuous steel sheet manufacturing equipment comprising a continuous casting device and a hot rolling line.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a continuous steel sheet manufacturing facility comprising a continuous casting apparatus and a hot rolling line. A slab discharged from the continuous casting apparatus is reheated in a reheating furnace, and a bar (thickness) is processed by a rough mill. The roll is roughly rolled to a thickness of 3 to 50 mm, finish rolled to a strip (1 to 16 mm in thickness) by a finishing mill, and wound up by a down coiler. With such a continuous casting apparatus and a continuous steel plate manufacturing facility including a hot rolling line, it is possible to realize energy saving and process saving.

However, such a conventional continuous steel plate manufacturing facility requires a large number of mills (rolling mills) and rolls from a thick plate (slab) to a thin plate (strip) by the same facility, so that the entire rolling line length is reduced. There is a problem that becomes very long.
Therefore, in order to shorten the total length of the continuous steel plate manufacturing equipment, for example, Japanese Patent Application Laid-Open Nos. 7-80505 and 7-18
No. 5605, etc., have been proposed.

[0004] Japanese Patent Application Laid-Open No. 7-80505, "Continuous hot-rolling equipment for casting" comprises a rough mill 1 (rough rolling mill) and a finishing mill 2 (finish rolling mill) as schematically shown in FIG. The winding and rewinding device 3 is arranged in the middle, and the slab (slab) obtained by continuous casting is roughly rolled and wound, then unwound and finish-rolled, thereby achieving compactness of the equipment and energy saving. Things.

[0005] Japanese Patent Application Laid-Open No. 7-185605, entitled "Hot thin sheet material manufacturing equipment and hot thin sheet manufacturing method" is disclosed in FIG.
As schematically shown in (B), a rewinding / winding furnace 5 is disposed on each of the entrance and exit of the rolling mill 4, and a slab having a specific thickness is repeatedly wound by the rewinding / winding furnace 5. By performing rolling in a plurality of passes while rewinding, a hot thin sheet material is manufactured with compact equipment. This equipment is a so-called Steckel mill, which is equipped with a winding furnace 5 (Coiler Furnace) on both sides of the rolling mill 4 and has a slot (slit for clamping) in a drum 5a of the winding furnace 5.
And the leading end of the rolled material is inserted into the slot and the drum 5a
Is rotated to reliably take up the rolled material.

[0006]

SUMMARY OF THE INVENTION The above-mentioned JP-A-7-17-1
In the equipment of No. 85605 (FIG. 5A), the length of the rolling line can be shortened accordingly to wind up a thin plate (strip). However, since reversible rolling is not performed, the same number of roughing mills 1 and finishing mills 2 are required as before. However, the number of mills can hardly be reduced, and as a result, there is a problem that the total length of the equipment is still long. In addition, the winding and rewinding device 3 in FIG.
Although it has the advantage of winding a steel plate without a core, it is difficult to wind a thick plate of 30 mm or more or a thin plate of 10 mm or less, for example, and its application range is narrow, and it takes time to handle the wound coil. However, there is a problem that cooling is promoted.

On the other hand, JP-A-7-185605 (FIG. 5)
In the equipment of B), the number of mills can be greatly reduced, whereby the overall length can be greatly shortened, and the Steckel mill has such advantages that it can be used from thin plates to thick plates. The tip inserted into the slit is reversely wound, so that the tip becomes a nose-bent state, and it is necessary to provide a straightening device or the like to correct the tip. When the tip is wound, the speed of the drum 5a is increased. Is 1 /
It is necessary to reduce the speed to about 10 (for example, 20 to 30 m / min). As a result, frequent acceleration / deceleration must be performed, and there is a problem of low productivity.

The present invention has been made to solve such a problem. That is, the object of the present invention is to perform from rough rolling to finish rolling with a small number of mills, to greatly shorten the entire length, to make it compact, and to be able to continuously perform high-speed rolling and to have high productivity. Rolling equipment is provided.

[0009]

According to the present invention, an intermediate winder is provided adjacent to and in series with a rolling mill, and the intermediate winder allows the steel sheet to be rolled by the rolling mill to pass through or It has a take-up and unwind and a winding shaft, so that high-speed winding can be performed without bending the tip of the steel sheet, thereby rolling and rolling the steel sheet with an intermediate winding machine. Rolling equipment is provided. Preferably, the intermediate winder is provided on at least one of the entrance and exit sides of the rolling mill, and the thin plate is wound / rewinded at a high speed while maintaining and heating the thin plate, and simultaneously finish-rolled at a high speed.

[0010] According to the configuration of the present invention, the intermediate winder can pass the steel sheet to be rolled by the rolling mill as it is. Then, it can be rolled to a predetermined thickness by the same rolling mill. In addition, it becomes thin and long by rolling, and the intermediate winder is wound around the winding shaft without bending the tip of the steel sheet, heated and heated, and rolled while rewinding, so that it can be rolled from rough rolling with a small number of mills. Finishing rolling can be performed, the overall length can be significantly reduced, the size can be reduced, and continuous high-speed rolling can be performed, thereby improving productivity.

According to a preferred embodiment of the present invention, the intermediate winder has a heating furnace which surrounds and winds the wound steel sheet. By maintaining and heating the coiled steel sheet (coil) with this heating furnace, it is possible to prevent the temperature of the coil from decreasing during thin-sheet rolling, to maintain the rolling characteristics of the entire rolled material and efficiently produce a high-quality rolled material. Can be manufactured.

[0012]

Preferred embodiments of the present invention will be described below with reference to the drawings. In each of the drawings, common portions are denoted by the same reference numerals, and redundant description will be omitted. FIG. 1 is an overall configuration diagram of a rolling facility according to the present invention. In this figure, (A) shows a plan view and (B) shows a side view. As shown in this figure, the rolling equipment 10 of the present invention is provided with an intermediate winder 12 adjacent to and in series with a rolling mill 11. As shown in this figure, in this example,
In this example, the rolling mill 11 includes one rough mill 11a and a finishing mill 11b.
1 (rough mill 11a). With this configuration, the line on the entry side of the rolling mill 11 can be shortened. In this figure, 6 is a continuous casting device (slab caster), 7 is an intermediate heating furnace (for example, a walking beam type), 8a and 8b are shears (cutters), 9 is a pinch roller, 13 is a cooling device, and 14 is a down coiler. , 15 is a piler, 16 is a slab cutter between runs, 17 is a vertical mill, and 18 is a run-out table.

In FIG. 1, an intermediate winding machine 12 is configured to allow a steel sheet to be rolled by a rolling mill 11 to pass through the same or to perform winding and rewinding. In addition, the intermediate winding machine 12 has a winding shaft 12a so that high-speed winding can be performed without bending the front end of the steel plate. Further, the intermediate winder 12 has a heating / heating furnace 12b which surrounds and winds the wound steel plate, and heats and heats the wound steel plate (coil).

FIG. 2 is an example of rolling from a thick plate to a thin plate. In this figure, the vertical lines on the left and right correspond to the coarse mill 11 respectively.
a and the position of the finishing mill 11b, and the broken lines and numerals in the figure illustrate the order of rolling and the plate thickness at that time. As shown in this figure, while the steel plate to be rolled is short and thick (for example, 11
In the case of 0 mm → 80 mm → 65 mm → 30 mm), the steel sheet can be passed through as it is, and can be rolled to a predetermined thickness (for example, 8.0 mm) by the same rolling mill 11 (rough mill 11 a and finish mill 11 b). . Further, the steel sheet becomes thin and long by rolling (for example, 8.0 mm), and is wound around the winding shaft 12a by the intermediate winder 12 without bending the front end of the steel sheet, and is heated or heated by the heating and heating furnace 12b. By rolling while returning, rough rolling to finish rolling can be performed with a small number of mills.

The steel sheet finish-rolled to a thin plate (for example, 3.0 mm) by the finishing mill 11b may be wound around a coil by a down coiler 14 via a pinch roller 9, a cooling device 13, etc. 8b, the sheet may be cut into sheets, stacked by the piler 15 and carried out.

FIG. 3 is another overall configuration diagram of the rolling equipment according to the present invention. In this figure, a heating and holding furnace 12b is also installed on the exit side of the rolling mill 11 (finishing mill 11b). After being heated and heated by the heating and holding furnace 12b, reverse rolling is performed while rewinding, and then rough milling is performed. 11a and finish mill 11b for finish rolling. The other configuration is the same as that of FIG. With this configuration, it is possible to reduce the length of both the entrance and exit sides of the rolling mill 11.

As described above, the intermediate winder 12 is provided on at least one of the inlet and outlet sides of the rolling mill 11 (in this example, the rough mill 11a and the finishing mill 11b), and winds / rewinds at a high speed while keeping the thin plate heated. At the same time, high-speed finish rolling enables rough rolling to finish rolling with a small number of mills, greatly shortening the overall length, enabling compactness, and continuous high-speed rolling. Productivity can be increased.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention. For example, in the above-described embodiment, the rolling mill 11 is configured by two units of the rough mill 11a and the finishing mill 11b, but may be a single mill that performs both the rough rolling and the finishing rolling, or may include three or more rolling mills. It may be constituted by a mill.
In addition, although the intermediate winder 12 is provided on one of the entrance and exit sides of the rolling mill, it may be provided on both the entrance and exit sides to shorten both lines on the entrance and exit sides.

[0019]

As described above, according to the structure of the present invention, the intermediate winder can pass the steel plate to be rolled by the rolling mill as it is, so that the steel plate is rolled while the rolled steel plate is short and thick. It can be passed back and forth as it is and rolled to a predetermined thickness by a rolling mill. In addition, by rolling and thinning, the intermediate winding machine is wound around the winding shaft without bending the tip of the steel sheet, heated and heated, and rolled while being rewound, so that it can be rolled from rough rolling with a small number of mills. Finishing rolling can be performed, the overall length can be significantly reduced, the size can be reduced, and continuous high-speed rolling can be performed, thereby improving productivity.

Therefore, the rolling equipment of the present invention can perform from rough rolling to finish rolling with a small number of mills, can greatly reduce the overall length and can be made compact, and can continuously perform high-speed rolling. It has excellent effects such as an increase in productivity.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a rolling facility according to the present invention.

FIG. 2 is an example of rolling from a thick plate to a thin plate.

FIG. 3 is another overall configuration diagram of the rolling equipment according to the present invention.

FIG. 4 is a configuration diagram of a continuous steel sheet manufacturing facility including a continuous casting device and a hot rolling line.

FIG. 5 is a configuration diagram of a conventional rolling facility.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rough mill (rough rolling machine) 2 Finishing mill (finishing rolling machine) 3 Winding / unwinding device 4 Rolling machine 5 Winding furnace 5a Drum 6 Continuous casting device (slab caster) 7 Intermediate heating furnace 8a, 8b Shear 9 Pinch roller DESCRIPTION OF SYMBOLS 10 Rolling equipment 11 Roller 11a Rough mill 11b Finishing mill 12 Intermediate winder 12a Winding shaft 12b Heating and heating furnace 13 Cooling device 14 Downcoiler 15 Plate handling device (pillar) 16 Running slab cutter 17 Vertical mill

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical indication location C21D 9/68 C21D 9/68 (72) Inventor Tsune Honjo Shinnakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa No. 1 Ishi Kawashima Harima Heavy Industries Co., Ltd. Yokohama Engineering Center (72) Inventor Norio Iwanami No. 1 Shinnakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Ishi Kawashima Harima Heavy Industries Co., Ltd. Yokohama Engineering Center

Claims (3)

[Claims] 1. An intermediate winding machine is provided adjacent to and in series with a group of rolling mills, and the intermediate winding machine can pass a steel sheet to be rolled by a rolling mill as it is or can perform unwinding and winding. A rolling facility having a take-up shaft and capable of high-speed winding without bending the end of the steel sheet, whereby the steel sheet is rolled while being wound / rewinded by an intermediate winder. . 2. The rolling equipment according to claim 1, wherein the intermediate winding machine has a heating furnace that surrounds the wound steel sheet and keeps or heats the steel sheet. 3. The intermediate winding machine is provided on at least one of the entrance and exit sides of a rolling mill, and the thin plate is wound / rewinded at a high speed while maintaining and heating the thin plate, and simultaneously finish-rolled at a high speed. Item 2. The rolling equipment according to Item 1.