KR20120122244A

KR20120122244A - cooling apparatus for bearing of working roller in rolling facilities

Info

Publication number: KR20120122244A
Application number: KR1020110040295A
Authority: KR
Inventors: 변재욱; 송한성
Original assignee: 현대제철 주식회사
Priority date: 2011-04-28
Filing date: 2011-04-28
Publication date: 2012-11-07

Abstract

The present invention relates to a bearing cooling apparatus of a work roller for a rolling mill. Specifically, the bearing housing 132 is installed at the end of the work roller for rolling equipment to support the bearing, and the cooling water flow passage 133 is formed to surround the outer side of the bearing insertion portion of the bearing housing. 133 includes a plurality of internal passages 133a which are processed and formed in the bearing housing, and additional passages 133b which are formed by a cover provided outside the bearing housing and connect the internal passages. According to this configuration, the amount of wear of the work roller due to the cooling water is small and the bearing is prevented from being overheated, thereby effectively stabilizing the equipment and extending the life of the work roller and the bearing.

Description

Cooling apparatus for rolling rollers

The present invention relates to a bearing cooling device of a work roller for a rolling equipment, and more particularly, to a bearing cooling device of a work roller for a rolling equipment, which prevents the bearing from being overheated by heat transmitted through the work roller that the workpiece is in contact with. It is about.

General steel production consists of a steelmaking process to produce molten iron, a steelmaking process to remove impurities from molten iron, a regeneration process in which iron in a liquid state becomes a solid, and a rolling process in which iron is made of steel or wire.

Rolling refers to a process in which slabs, blooms, billets, etc. produced in a continuous casting process are passed through a plurality of rotating rolls to increase or thin a continuous force, and are divided into hot rolling and cold rolling.

After the rolling, the flattening operation is performed by the work roller to increase the flatness of the blade.

The present invention stabilizes the installation by effectively preventing the bearing from being overheated by the heat transmitted through the work roller in contact with the workpiece in the rolling equipment to stabilize the equipment and to extend the life of the work roller and the bearing bearing cooling apparatus The purpose is to provide.

The bearing cooling apparatus of the work roller for a rolling mill according to the present invention includes a bearing housing which is provided at an end of the work roller for a rolling mill to support a bearing, and a cooling water flow path formed to surround the outer side of the bearing insertion portion of the bearing housing. do.

The cooling water flow path includes a plurality of internal flow paths formed by being processed inside the bearing housing, and an additional flow path formed by a cover provided on an outer side of the bearing housing to connect the internal flow paths.

The cover has a flange and a web and has a bent c-shaped steel shape installed along the upper outer circumferential surface of the bearing housing.

The web is flattened to be in contact with the outer circumferential surface of the bearing housing, and a concave inlet belt groove is formed at a portion of the web in contact with the bearing housing.

According to the bearing cooling apparatus of the work roller for a rolling installation according to the present invention, compared to the structure to reduce the heat transmitted to the bearing by spraying the coolant directly on the surface of the conventional work roller, the amount of wear of the work roller due to the cooling water is less and the bearing is overheated This effectively prevents the stabilization of the equipment and has the effect of extending the life of the work roller and bearing.

1 is a process chart showing a rolling process of a thick plate to which an embodiment of the present invention is applied;
2 is a configuration diagram showing a work table installed in the calibrator of FIG. 1;
3 is an elevation view of the bearing housing of FIG. 2;
4 is a left side view of FIG. 3;
5 is a plan view of FIG. 4;
6 is a right side view of FIG. 3.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this embodiment, a bearing cooling apparatus of a work roller installed on a work table of a straightener in the rolling process of a thick plate will be described as an example.

FIG. 1 is a process chart showing a rolling process of a thick plate to which an embodiment of the present invention is applied, and FIG. 2 is a block diagram showing a work table installed in the straightener of FIG.

As shown in FIG. 1, the blades heated to a target temperature in a reheating furnace (10) are rolled to a certain thickness in a roughing mill (20) and a finishing mill (30: finishing mill). After that, the flattening operation is performed by a working roller installed on a working table of the straightener 40 to increase the flatness of the blade.

On the other hand, a calibrator is additionally installed between the roughing mill 20 and the finishing mill 30 to correct the blade during rolling by a working roller installed on a working table of the calibrator. have.

In order to maintain the standby state of the blade for maintaining the trouble or continuous rolling of the continuous process, a device that needs to adequately perform a buffer role such as a roller table is required.

That is, the slab manufactured by the continuous casting process is heated to the target temperature according to the steel grade in the heating furnace 10, then made into a blade of a constant thickness in rough rolling, and then finishing finishing to the thickness of the final product. .

The blade rolled to a predetermined plate thickness by the filament mill 30 is subjected to accelerated cooling for miniaturization of crystal grains or control of metamorphic structure. At this time, the blade is bent due to residual stress, rolling, cooling, etc. distributed on the blade. Deformation of the back.

Therefore, the residual stress of the blade is removed to some extent by the calibrator 40, and the flatness is improved by correcting to a deformed shape.

In addition, in order to solve the logistics congestion of thick plates and rolled products, increase flatness of blades and increase productivity, an additional roller table may be installed to improve the production process of finishing rolling.

As shown in FIG. 2, in the work table 100, a plurality of guide rollers 120 are installed at the transport frame 110, and work frames 130 and 140 are installed at both sides of the transport frame 110. The bearing housings 132 and 142 are respectively installed on the work frames 130 and 140 to support the work roller 150 by the bearing B.

The work roller 150 is installed in the direction perpendicular to each other at a predetermined interval on the guide roller 120.

The transfer frame 110 and the working frame (130, 140) may be integrally installed by welding, may be installed to be separated from each other through a fastening member. The transfer frame 110 and the working frame (130, 140) is fixed to the ground by anchor bolts.

The bearing housings 132 and 142 are made of a separate type or an integral type in which upper and lower parts are fixed by a fastening member. In this embodiment, a unitary structure is illustrated.

The bearing housings 132 and 142 have a hole H (shown in FIG. 6) in which a bearing B is inserted and installed, and the lower side protrudes in a rectangular shape and the upper side protrudes in a convex shape. It is a structure bracket.

Hereinafter, only the bearing housing 132 installed on the left side of the work roller 150 will be described in detail with reference to FIGS. 3 and 6. The bearing housing 142 installed on the right side of the work roller 150 is similar to the bearing housing 132 on the left side.

The bearing housing 132 is installed at the end of the work roller 150 for rolling equipment to support the bearing (B), as shown in the cooling water formed to surround the outer side of the bearing insertion portion of the bearing housing 132 The flow path 133 is formed.

A cover 134 is provided at an upper side of the bearing housing 132 to form an additional flow path to be described later, and a side cover 135 is installed at one side end of the hole H into which the bearing B is inserted. (H) is blocked.

The cooling water flow path 133 is formed by a plurality of internal flow paths 133a which are processed and formed in the bearing housing 132, and the cover 134 provided on the outside of the bearing housing 132 so that the inside It consists of an additional flow path 133b connecting the flow path 133a.

The inner passage 133a is formed at both sides of the additional passage 133b, and a cooling water inlet 133c is formed at an end thereof, and the inner passage 133a and the additional passage 133b are formed at the hole H. The bearing is cooled by a flow of cooling water that is formed to surround a portion where the bearing is fitted.

In the internal passage 133a, the vertical passage 133a-1 and the horizontal passage 133a-2 are perpendicular to each other.

The cooling water inlet and outlet 133c is formed on the longitudinal side and the width side of the bearing housing 132, respectively. The cooling water inlet and outlet 133c are formed at both ends of the horizontal flow passage 133a-2, respectively. The coolant inlet 133c is provided with a pipe (not shown).

In addition, a plurality of holes 132a for fixing the bearing housing 132 to the work frame 130 are formed in the vertical direction at the edge of the bearing housing 132 by fastening means (not shown).

The cover 134 has a flange and a web and has a bent c-shaped steel shape installed along the upper outer circumferential surface of the bearing housing 132.

The web of the cover 134 is flat to be in contact with the outer circumferential surface (upper surface) of the bearing housing 132, and the concave inlet groove 132b which connects both sides to a portion where the web of the cover 134 is in contact with the bearing housing. ) Is formed to form a cooling water flow path.

One side (right side) of the work roller 150 is provided with a drive motor (not shown) and a power transmission means (in this embodiment, denoted by bevel gear V) for driving the work roller 150.

In addition, since the remaining configuration of the work table 100 is a general configuration installed in the calibrator, detailed description thereof will be omitted.

In the bearing cooling apparatus of the work roller according to the present invention configured as described above, the cooling water inlet (not shown) is introduced into the horizontal flow passage 133a-2 of the inner flow passage 133a through the cooling water inlet 133c on one side through a pipe. Cooling water flows into one side of the additional flow path 133b through the vertical flow path 133a-1, and then through the additional flow path 133b and the internal flow path 133a on the opposite side, through the flow path formed by the recess groove 132b. After cooling, the bearing B installed in the hole H is cooled, and then flows out through the cooling water inlet 133c on the opposite side.

According to the bearing cooling device of such a work roller, the amount of wear of the work roller due to the coolant is reduced and the bearing is effectively prevented from overheating, thereby stabilizing the equipment, compared to the conventional structure in which cooling water is directly applied to the surface of the work roller to reduce the transfer to the bearing. It has the effect of extending the life of work roller and bearing.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. The scope of the technical protection shall be determined by the technical idea of the appended claims.

100: worktable 110: feed frame
120: guide roller 130, 140: working frame
132, 142: bearing housing 132b: recessed groove
133: cooling water flow path 133a: internal flow path
133b: additional flow path 133c: cooling water entrance

Claims

A bearing housing installed at the end of the work roller for the rolling equipment to support the bearing;
And a cooling water flow path formed to surround the outside of the bearing insertion portion of the bearing housing.

The method according to claim 1,
The cooling water flow path,
A plurality of internal flow paths formed and processed in the bearing housing;
The bearing cooling apparatus of the work roller for a rolling installation, characterized in that it comprises an additional flow path formed by a cover provided on the outside of the bearing housing to connect the internal flow path.

The method according to claim 2,
The cover has a flange and a web and bearing cooling apparatus of the work roller for the rolling equipment, characterized in that the bent c-shaped steel is installed along the upper outer peripheral surface of the bearing housing.

The method according to claim 3,
The web is flat to contact the outer circumferential surface of the bearing housing,
The bearing cooling device of the work roller for a rolling installation, characterized in that the web is in contact with the bearing housing is formed with a concave inlet band groove connecting both sides.