JPH08117806A - Rolling equipment - Google Patents

Abstract

PURPOSE: To reduce the number of rolling mills and to shorten a rolling line by executing rolling from rough rolling to finish rolling with finishing mills. CONSTITUTION: A reversible rolling mill RF1 for rolling a material 2 to be rolled which is fed from a heating furnace 1 by forward and backward rotations, rolling mill train F2-F5 installed on the downstream side of this reversible rolling mill RF1 and coiler/uncoiler 3 installed on the upstream side of the reversible rolling mill RF1 are provided. The material 2 to be rolled is rolled by forward rotation with the reversible rolling mill RF1 and the first rolling mill F2 on the inlet side of the rolling mill train F2-F5 and, next, coiled with the coiler/uncoiler 3 after rolling the material by backward rotation with the reversible rolling mill RF1 and, then, rolled by making the reversible rolling mill RF1 and rolling mill train F2-F5 tandem after uncoiling the material from the coiler/uncoiler 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill in which the number of rolling mills is reduced from rough rolling to finish rolling in a finish rolling mill.

[0002]

2. Description of the Related Art A slab having a hot rolling process of 20 to 30 mm
To a thickness of 1 to 2 mm, and a finish rolling step of rolling to a thickness of about 1 to 2 mm. Various types of rough rolling mills are used in the hot rolling equipment. FIG. 6 shows an example of the arrangement of such rough rolling mills. (A) shows six rough rolling mills (R1 to R).
6) Roll the material to be rolled, and use the scale breaker FS
After removing the scale at B, 7 finishing mills (F1
This is a rolling facility for rolling in F7) and winding it on a down coiler DC. (B) is a rough rolling mill, a reverse rolling mill RRM1
It is used as a table, and it is repeatedly rotated in the forward and reverse directions to a predetermined thickness and then sent to the finish rolling mills F1 to F6, and the hot rolling equipment is compact. (C) is an improved version of (B), in which the strip (rolling material) sent from the reverse rolling machine RRM is wound up on the winding / rewinding machine W, and the finishing strip is rolled from the tail end of the strip. It is to be sent to F1 to F5.

[0003]

As described above, if the rolling mills are arranged separately in the rough rolling line and the finishing rolling line, there is a problem that the number of rolling mills increases and the rolling equipment becomes large. Recently, with the development of a thin slab continuous casting machine, thin slabs of about 100 mm have been cast,
This thin slab can be directly charged into a heating furnace, soaked at a predetermined temperature, and then supplied to a rolling line.

The present invention was created under such circumstances, and an object of the present invention is to provide a rolling facility for directly rolling a material to be rolled supplied from a heating furnace from rough rolling to finish rolling with a finish rolling mill.

[0005]

In order to achieve the above-mentioned object, one reverse rolling machine for forwardly and reversely rolling a material to be rolled supplied from a heating furnace, and a reverse rolling machine provided on the downstream side of the reverse rolling machine. And a rewinding machine provided on the upstream side of the reverse rolling mill, and the reverse rolling mill and the rolling mill at the leading side of the rolling mill row on the entry side straighten the material to be rolled. Roll-rolling, then reverse-rolling with a reverse rolling machine, then winding with the winding and rewinding machine, then rewinding with the rewinding and rewinding machine, and rolling in tandem with the reverse rolling machine and rolling mill train. To

[0006] Further, a reverse rolling mill train consisting of two units for forwardly and reversely rolling the material to be rolled fed from the heating furnace, a rolling mill train provided on the downstream side of the reverse rolling mill train, and the reverse roll. And a rewinding and rewinding machine provided on the upstream side of the rolling mill train, wherein the reverse rolling mill train normally rotates the material to be rolled,
After reverse rolling, it is wound on the winding and rewinding machine and then rewound by the winding and rewinding machine so that the reverse rolling mill train and the rolling mill train are tandemly rolled.

[0007]

The rolled material of about 100 mm supplied from the heating furnace is forward-rolled by the reverse rolling mill and the rolling mill at the head of the rolling mill train, further reverse-rolled by the reverse rolling mill, and sent out from the conventional rough rolling line. Thickness (20m
The thickness is about the same as the thickness (exceeding m. Next, the film is rewound from the take-up and rewinding machine, and finish rolling is performed with the reverse rolling machine and the rolling mill row in tandem. This enables rough rolling to finish rolling with the same number of rolling mills as the conventional finishing rolling mill train. The take-up / rewinder is the same as the conventional one and does not require a heat retaining function.

Further, a material to be rolled having a thickness of about 100 mm supplied from a heating furnace is forward-rolled and reverse-rolled by a train of reverse rolling mills, and has a thickness (2) fed from a conventional rough rolling line.
The thickness is almost the same as the thickness (exceeding 0 mm). Next, rewinding is performed from the take-up and rewinding machine, and finish rolling is performed with the reverse rolling mill train and the rolling mill train in tandem. This enables rough rolling to finish rolling with the same number of rolling mills as the conventional finishing rolling mill train. The take-up / rewinder is the same as the conventional one and does not require a heat retaining function.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration and rolling schedule of the first embodiment of the present invention. A material 2 to be rolled having a length of about 90 mm is loaded from a heating furnace 1 into a reverse rolling machine RF1 which performs normal rotation and reverse rolling. A row of rolling mills F2, F3, F4, F5 is arranged in tandem on the exit side of the reverse rolling mill RF1, and a down coiler 4 for winding a coil which has been finished rolled is provided downstream thereof. Reverse rolling machine RF
A winding and rewinding machine 3 is arranged on the upstream side of 1 to wind up the material to be rolled 2 which is reversely rolled by a reverse rolling machine RF1.

FIG. 2 is a diagram showing the structure of the winding / rewinding machine 3. The winding / rewinding machine 3 is composed of a bending roll 7 for winding the rolled material 2 and a cradle roll 6 for winding around the coil 8. When the cradle roll 6 is rotated, the rolled material 2 having a winding curl is wound up to form a coil 8. Rewinding is performed by rotating the cradle roll 6 and pulling out the material to be rolled 2 in the reverse of the winding.

An example of the rolling schedule is shown on the lower side of FIG. The case where the material to be rolled 2 supplied from the heating furnace 1 in a thickness of 90 mm is rolled into a product of 1.5 mm is shown. 90 mm
When it is loaded into the reverse rolling machine RF1 by the above method, it is rolled to 65 mm by forward rolling, and further it is rolled to 40 mm by forward rolling by the rolling machine F2. Next, reverse, but rolling mill F
No. 2 is conveyed only in the reverse direction and is not rolled, and is rolled only by the reverse rolling machine RF1 to be 22 mm and wound on the winding / rewinding machine 3. This forward rotation, reverse rotation rolling mill F3,
F4 and F5 only carry the rolled material 2. Take-up and rewinder 3
Since it is wound by 22 mm, the temperature drop of the coil is small and does not adversely affect the next finish rolling. Next, finish rolling is performed. The reverse rolling machine RF1 and the rolling mill trains F2 to F5 are tandem, rewound by the winding and rewinding machine 3, and forwardly rolled. Reverse mill RF1 to 11 mm, rolling mill F2
To 6.5 mm, the rolling mill F3 to 3.1 mm, and the rolling mill F4 to 2.1 mm. Finally at rolling mill F5 1.5
mm and wind it on the down coiler 4.

Next, a second embodiment will be described. FIG. 3 is a diagram showing the configuration and rolling schedule of the second embodiment. In this embodiment, a rolling mill F6 is added to the rolling mill trains F2 to F5 in FIG. 1, and the other configurations are the same. This gives 1.0 mm
Can be rolled up to. The rolling schedule is the same as in the case of FIG. 1 up to rolling by the rolling mill F3, and rolling from 3.1 mm to 2.0 mm by the rolling mill F4 and rolling by the rolling mill F5.
To 1.2 mm. Finally with rolling mill F6 1.
Set it to 0 mm and wind it on the down coiler 4.

Next, a third embodiment will be described. FIG. 4 shows the configuration and rolling schedule of the third embodiment. The material to be rolled 2 supplied from the heating furnace 1 is loaded into the reverse rolling mills RF1 and RF2 that operate in tandem. Reverse rolling machine RF1
Rows F3, F4 and F5 of rolling mills are arranged in tandem downstream of RF2. A rewinding and rewinding machine 3 is provided on the inlet side of the reverse rolling mill RF1, and a down coiler 4 for winding the rolled coil is provided downstream of the rolling mill trains F3 to F5.

The rolling schedule shows the case of supplying 120 mm and rolling to a product of 1.5 mm. First, forward rolling is performed, and from 120 mm, it is rolled to 80 mm by the reverse rolling machine RF1 and 5 by the reverse rolling machine RF2.
It is rolled to 2 mm. Next, it is rolled by reverse rolling RF2 to 34 mm by reverse rolling RF2 and 22 mm by reverse rolling RF1 and is wound by the winding and rewinding machine 3. Since the coil is wound by the take-up / rewinder 3 at a length of 22 mm, the temperature of the coil does not drop so much that the subsequent finish rolling is not adversely affected. Next, finish rolling is performed. The reverse rolling mill trains RF1 and RF2 and the rolling mill trains F3 to F5 are tandem, rewound by the winding and rewinding machine 3, and forwardly rolled. Reverse rolling machine RF1 11m
m and 6.5 mm with the reverse rolling machine RF2. The rolling mill F3 makes it 3.1 mm, and the rolling mill F4 makes it 2.1 mm. Finally, it is rolled to a down coiler 4 with a rolling mill F5 to 1.5 mm. As described above, in this embodiment, the number of reverse rolling mills is two and the number of rolling mill rows is three.
A material 2 to be rolled having a thickness of m can be rolled to 1.5 mm.

Next, a fourth embodiment will be described. FIG. 5 shows the configuration and rolling schedule of the fourth embodiment. This embodiment is shown in FIG.
Rolling mill row F3 to F5 with rolling mill F6 added,
Other configurations are the same. As a result, from 120 mm
It can be rolled to 0 mm. The rolling schedule is the same as the case of FIG. 4 up to rolling by the rolling mill F3,
Rolling mill F4 rolls from 3.1 mm to 2.0 mm, and rolling mill F5 rolls to 1.2 mm. Finally rolling mill F6
To 1.0 mm and wind up on the down coiler 4.

[0016]

As is apparent from the above description, the present invention is used as a take-up / rewinder in which a single reverse rolling mill and a single ordinary rolling mill perform forward rolling, and a reverse rolling machine reverses and reverses. By performing finish rolling with the take-up, reverse rolling mill and rolling mill train in tandem, it is possible to perform rough rolling to finish rolling with the same number of conventional finishing rolling mill trains. In addition, two reverse rolling mills perform forward rolling, then reverse rolling, then rewinding and rewinding, and the reverse rolling mill and rolling mill trains are tandem to finish rolling to obtain a conventional finish rolling mill. The same number of trains can be used for rough rolling to finish rolling.
As a result, the number of rolling mills can be reduced, the length of the rolling line can be shortened, and the facility cost can be reduced. Further, since the winding / rewinding machine to be used may be an ordinary one without heat-retaining equipment, the equipment cost is further reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration and a rolling schedule according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a winding / rewinding machine.

FIG. 3 is a diagram showing a configuration and a rolling schedule of a second embodiment of the present invention.

FIG. 4 is a diagram showing the configuration and rolling schedule of a third embodiment of the present invention.

FIG. 5 is a diagram showing the configuration and rolling schedule of a fourth embodiment of the present invention.

FIG. 6 is a diagram showing a conventional rolling facility.

[Explanation of reference symbols] 1 heating furnace 2 rolled material 3 winding rewinding machine 4 down coiler 6 cradle roll 7 bending roll 8 coil RF1, RF2 reverse rolling machine F2, F3, F4, F5, F6 rolling machine

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Harumi Baba Inventor, Shin-Nakahara, Isogo Ward, Yokohama City, Kanagawa Prefecture Ishikawa Shima Harima Heavy Industries, Ltd. Yokohama Engineering Center

Claims (2)

[Claims] 1. A material to be rolled supplied from a heating furnace is normally rotated,
A reverse rolling machine for reverse rolling, a rolling mill train provided on the downstream side of the reverse rolling mill, and a take-up / rewinding machine provided on the upstream side of the reverse rolling mill. The material to be rolled is forward-rolled by a rolling mill and the leading rolling mill on the entry side of the rolling mill row, then reverse-rolled by a reverse rolling mill, and then wound by the winding and rewinding machine, and then winding and winding. Rolling equipment characterized by rewinding from a rewinding machine and rolling in a tandem manner with a reverse rolling machine and a rolling mill train. 2. The material to be rolled supplied from the heating furnace is normally rotated,
A reverse rolling mill train consisting of two units for reverse rolling, a rolling mill train provided on the downstream side of the reverse rolling mill train, and a take-up / rewinding machine provided on the upstream side of the reverse rolling mill train. Provided, after the material to be rolled in the reverse rolling machine train forward, reverse rolling, wound on the winding and rewinding machine, then rewind from the winding and rewinding machine and reverse rolling machine train and rolling machine train Rolling equipment characterized by rolling in tandem.