JPH0542351A - Short side support roll for continuous caster - Google Patents

Abstract

PURPOSE:To prevent breakage of a bearing and a roll body by well following the drum type short side support roll in support roll group set below a mold in a continuous caster to a cast slab drawn out from the mold. CONSTITUTION:The drum type short side support roll 3 is supported as rotatable to roll shaft 6 supported at between two frames 5 through one centripetal type bearing 9 arranged at center of the axial direction of roll body 3a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a short side support roll for supporting a slab in a continuous casting machine.

[0002]

BACKGROUND OF THE INVENTION Continuous casting of steel involves feeding molten steel into a mold and cooling it to form a solidified shell through a group of support rolls, guide rolls and pinch rolls located below the mold. Is continuously drawn out, and in the meantime, it is cooled by cooling water sprayed from a large number of nozzles arranged between the rolls to form a continuous slab having a predetermined cross-sectional shape.

In continuous casting of the above-mentioned steel, there is a problem that cracks and bulging occur on the short side surface of the cast slab and breakout occurs in some cases. Therefore, in order to prevent such a problem, as shown in FIG. 2, of the support roll group 2 arranged below the mold 1,
As a support roll 3 for supporting the short side of the slab, a drum-shaped roll having inclined surfaces formed on both sides of a central flat surface is used. By supporting the short side of the slab 4 with such a drum-shaped support roll 3, it is possible to prevent cracking and bulging that occur on the short side surface of the slab.

FIG. 3 is a schematic front view of a conventional drum-shaped short side support roll 3. As shown in FIG. 3, in the conventional short side support roll 3, the roll body 3a is rotatably supported by the roll shaft 6 supported by the frames 5 and 5 through the two left and right bearings 7 and 7. Structure.
Reference numeral 8 is a bearing retainer for retaining each of the two left and right bearings 7, 7.

[0005]

The conventional short side support roll 3 described above has the following problems. That is, the two left and right bearings 7, 7 that rotatably support the roll body 3a on the roll shaft 6 are not centripetal with respect to the roll body 3a. Therefore, the bearings 7, 7 are easily damaged by the horizontal deviation of the roll body 3a. Further, when the roll main body 3a shakes in the horizontal direction, the short surface of the roll main body 3a easily contacts the frame 5, and as a result, the end surface of the roll main body 3a may be damaged. When the bearings 7, 7 are damaged, the operation must be temporarily stopped and the bearings must be replaced, resulting in a decrease in production efficiency.

Therefore, an object of the present invention is to solve the above-mentioned problems, prevent the bearing and the roll body from being damaged in the short side support rolls of the support roll group arranged below the mold of the continuous casting machine, An object of the present invention is to provide a short-sided support roll for a continuous casting machine, which enables smooth continuous casting.

[0007]

Means for Solving the Problems The inventors of the present invention have conducted extensive studies to solve the above-mentioned problems. As a result, if the roll main body of the short-side support roll is rotatably supported via one centripetal bearing provided at the center in the axial direction, even if the roll main body shakes in the horizontal direction, it follows the roll main body. However, it was found that the bearing could be prevented from being damaged.

The present invention has been made on the basis of the above findings, and in a drum type support roll for supporting the short side of a continuously cast slab drawn from a mold, the support roll is 2 The roll main body is rotatably supported by a roll shaft supported between two frames via one centripetal bearing provided at the center in the axial direction.

Next, the present invention will be described with reference to the drawings. FIG. 1 shows a short side support roll 1 according to the present invention.
It is a schematic front view which shows an embodiment. As shown in the drawing,
The short side support roll 3 of the present invention includes frames 5, 5
The drum-shaped roll body 3a is attached to the roll shaft 6 supported by
It is rotatably supported via one centripetal bearing 9 provided at the center in the axial direction.

Reference numeral 10 denotes a bearing retainer provided on both sides of one central bearing 9 so as to surround the drum-shaped roll main body 3a, and 11 is provided on one side of the bearing 9 between the roll main body 3a and the roller main body 3a. The fluororubber dust wiper 12 is provided between the roll body 3a and the other side of the bearing 9, and the fluororubber oil seal 13 is attached to both sides of the roll body 3a. It is a holding plate.

[0011]

The present invention is configured as described above, and the drum-shaped roll main body 3a is supported by the roll shaft 6 via one bearing 9 provided at the center in the axial direction thereof. Since 9 has centripetal force, even if the drum-shaped roll main body 3a moves horizontally when supporting and pulling out the slab, the bearing 9 smoothly follows this, and as a result, the bearing 9 and the roll 9 The body 3a is not damaged.

[0012]

As described above, according to the present invention,
In the short side support rolls of the support roll group arranged below the mold of the continuous casting machine, the bearing and the roll body are prevented from being damaged, and smooth continuous casting can be performed, which is an industrially useful effect. ..

[Brief description of drawings]

FIG. 1 is a schematic front view showing one embodiment of a support roll of the present invention.

FIG. 2 is a schematic front view showing a mold and a support roll group portion of a continuous casting machine.

FIG. 3 is a schematic front view showing an example of a conventional support roll.

[Explanation of symbols] 1 mold 2 support roll group 3 short side support roll 3a roll body 4 cast piece 5 frame 6 roll shaft 7 bearing 8 bearing retainer 9 centripetal bearing

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasushi Ueyama 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd.

Claims (1)

[Claims] 1. A drum-shaped support roll for supporting a short side of a continuously cast slab pulled out from a mold, wherein the support roll is a roll shaft supported between two frames. Is rotatably supported by a centripetal bearing provided at the center in the axial direction of the short side support roll for a continuous casting machine.