KR101259373B1 - Segement device of continuous caster - Google Patents

Abstract

The present invention relates to a continuous casting machine segment device in which the cross-sectional shape of the cast steel can be uniform with respect to the casting direction,
According to an aspect of the present invention, there is provided a continuous caster segment device including: a driving roll support frame coupled to a piston and vertically moved to apply pressure downward; A non-driven roll support frame spaced symmetrically about the driving roll support frame; And a side frame coupled to the non-driving roll support frame for fixing the driving roll support frame, wherein a protruding portion is formed at a side lower end of the driving roll support frame, A stopper for restricting the direction movement is formed.

Description

[0001] Segmentation device of continuous caster [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous casting machine segment device, and more particularly, to a continuous casting machine segment device capable of uniformizing the cross-sectional shape of casting with respect to the casting direction.

In general, a continuous casting process is a process in which a molten steel is injected into a tundish through a long nozzle in a ladle containing refined molten steel, and a molten steel temporarily stored in a tundish Is injected into the mold via a delivery system located between the tundish and the mold and is cooled by primary cooling in the mold and secondary cooling in the lower mold to form a billet, A blanom, a beam blank, a slab, and the like.

The molten steel discharged through the mold is first cooled in the mold and is drawn into a space between the upper and lower roller assemblies provided in the segment of the continuous casting apparatus in a state where the surface is somewhat solidified, The cooling water is continuously injected into the shape of the cast steel to be produced as shown in Fig.

The roller provided in the segment 1 applies a frictional force to the cast strip 5 to be drawn and formed between the upper roller coupling body 2 and the lower roller coupling body 4 and at the same time, (Hereinafter, referred to as an upper drive roll) coupled to the center of the upper roller coupling body 2 in consideration of a manufacturing cost reduction aspect, and the remaining rollers An idle roller 10a is used which is coupled so as to idle according to friction without the rotational force of a driving means such as a motor (see Figs. 2 and 3).

2 and 3, the segment is generally divided into an upper frame 2 and a lower frame 4. The upper frame is divided into a driving roll support frame 20 for supporting rollers and a non- A support frame 40 and a side frame 50 joined to fix the non-driving roll support frame. A hydraulic cylinder 52 is installed at the upper portion of the side frame, and the hydraulic cylinder and the lower frame are connected to each other by a tie rod 52.

Unlike the idle rolls, the upper drive roll is fixed to a separate support frame (drive roll support frame), which is not coupled to the side frame in a welded configuration. One or two hydraulic cylinders (see reference numeral 30 in FIG. 2 and FIG. 3) or two hydraulic cylinders (refer to reference numeral 30 in FIG. 4) are provided for maintaining a proper frictional force at the time of entering the dummy bar and withdrawing the cast The driving roll support frame is moved up and down.

The drive roll support frame is not welded to the side frame and is lower in height than other support frames, so that the rigidity against deformation is weak. A hydraulic cylinder 30 is provided for stiffness compensation and up and down movement. The hydraulic cylinder is fixed to an adjacent side frame before and after the drive roll support frame, and the piston rod is connected to the drive roll support frame and is movable up and down according to the direction of the hydraulic pressure.

Therefore, as shown in FIG. 4, when the static pressure generated in the non-solidified portion of the cast steel is received, the idle rolls and the drive rolls have different rigidities of frames supporting the casting rolls, L1 and L2). As a result, the cross-sectional shape of the cast steel becomes uneven in the casting direction, which causes fine flow in the casting direction and width direction in the non-solidified molten steel in the cast steel, thereby deteriorating the segregation state of the cast steel There is a problem. In addition, the quality of the cast steel is not uniform, thereby deteriorating the final product productivity.

4, in order to restrain the driving roll support frame 20 supporting the driving roll, when a stopper 60 is provided on an adjacent frame to receive an ironing force from the casting, Restrained the displacement. However, in such a structure, due to the difference between the deformation shape L1 of the driving roll support frame 20 and the deformation shape L2 of the non-driving roll support frame 40, the untreated main strip of the cast steel moves in the width direction, There is a problem that unevenness is produced in the direction of the arrow.

Also, in order to reduce the variation deviation, there is a slot formed in the center of the driving roll support frame in the transverse direction as in Korean Patent Laid-Open No. 10-2006-0022407, but this is not a fundamental solution, There is a problem that a structural strength problem arises.

Korean Patent Publication No. 10-2006-0022407

A technical object of the present invention is to provide a continuous casting machine segment device in which the cross-sectional shape of the cast steel can be uniform with respect to the casting direction.

A continuous casting machine segment device according to an embodiment of the present invention,

A driving roll support frame coupled to the piston and vertically moved so as to apply pressure downward; A non-driven roll support frame spaced symmetrically about the driving roll support frame; And a side frame coupled to the non-driving roll support frame for fixing the driving roll support frame, wherein a protruding portion is formed at a side lower end of the driving roll support frame, A stopper for restricting the direction movement is formed.

And the lower end of the stopper is installed at a position that is less than 1/2 of the height of the side frame.

And the upper end of the protrusion is disposed at a position that is less than 1/2 of the height of the driving roll support frame.

The stopper may include a concave driving roll support frame lateral insertion portion, and a side surface of the driving roll support frame may be inserted into the driving roll support frame lateral insertion portion.

The stopper may include a stopper projection having convex and concave portions formed in a convex shape, and a recessed stopper projection insertion portion into which the stopper projection is inserted may be formed on a side surface of the drive roller support frame.

According to the above-described embodiment of the present invention, when the projecting portion and the stopper come into contact with each other, the driving roll supporting frame can no longer move upward so that the moving space of the driving roll supporting frame can be limited. By removing the stopper provided on the upper portion, the problem that the non-coagulated cast strip of the cast steel moves in the width direction due to the difference in deformation shape between the drive roll support frame and the non-driven roll support frame, have.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a device configuration for a continuous casting process,
Fig. 2 is a partial perspective view showing one segment device constituting the continuous casting machine shown in Fig. 1, Fig.
Fig. 3 is a center side sectional view for showing the structure of the upper roller and the lower roller of the segment shown in Fig. 2 and the structure of the driving roll support frame and the non-driving roll support frame of the upper roller combination,
Fig. 4 is a schematic view of a continuous casting machine segment device according to the prior art, showing the deformation shape of a driving roll support frame and a non-
5 is a schematic diagram of a continuous casting machine segment device according to an embodiment of the present invention,
6 is a perspective view of a continuous casting machine segment device in accordance with an embodiment of the present invention,
7 is a perspective view of a continuous casting machine segment device according to another embodiment of the present invention,
8 illustrates a three-dimensional modeling of a continuous casting machine segment device and a deformation analysis by structural analysis software,
9 and 10 are graphs showing results obtained by three-dimensionally modeling a continuous casting cigarette segment device according to the prior art and analyzing the results by structural analysis software. FIG. 9 shows a case where the hydraulic cylinder pressure is 100 bar, Is 200 bar.
FIG. 11 is a graph showing the result of three-dimensional modeling of the apparatus of Korean Unexamined Patent Application Publication No. 10-2006-0022407,
FIG. 12 is a graph showing a result of a three-dimensional modeling of a continuous casting machine segment device according to an embodiment of the present invention and a result of a deformation analysis using structural analysis software.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that the same components or parts among the drawings denote the same reference numerals whenever possible. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as not to obscure the subject matter of the present invention.

FIG. 5 is a schematic diagram of a continuous casting machine segment device according to an embodiment of the present invention, FIG. 6 is a perspective view of a continuous casting machine segment device according to an embodiment of the present invention, and FIG. 7 is a perspective view of a continuous casting machine segment according to another embodiment of the present invention. Fig.

5, a continuous caster segment device according to an embodiment of the present invention includes a driving roll support frame 100 which is coupled to a piston and moves up and down so as to apply pressure downward, And a side frame 300 coupled to the non-driving roll support frame for fixing the non-driving roll support frame. A protrusion 110 is formed at a lower side of the side surface of the driving roll support frame 100 and a stopper 110 for contacting the protrusion 110 and restricting upward movement of the driving roll support frame is attached to the side frame 300. [ (310) is formed.

The driving roll support frame 100 is configured to be movable up and down by being coupled with at least one piston 120 at an upper end of the driving roll support frame 100. A plurality of supporting pieces, for example, four supporting pieces, And is connected to the driving roller 130 as it is connected to the bearing parts 131 to 134 that are coupled to the driving roller for smooth rotation. The driving roller 130 is rotated together with a rotational force of a power transmitting portion (not shown) such as a motor that is coupled to a rotating shaft of a driving roller and generates a rotating force.

A protrusion 110 protruding in a predetermined shape is formed at a lower side of the side surface of the driving roll support frame 100. That is, as shown in FIG. 4, in the conventional continuous casting machine segment device, a stopper is provided on an adjacent frame for restraining the driving roll support frame to restrain displacement in the upward direction when an ironing force is received from the casting. In this embodiment, the stopper is removed and the protrusion 110 is formed on the lower side of the side surface of the driving roll support frame, and the stopper 310 is provided on the side frame 300.

When the protrusion 110 and the stopper 310 are in contact with each other, the driving roll supporting frame 100 can no longer move upward, thereby limiting the moving space of the driving roll supporting frame 100, By removing the stopper provided on the upper portion of the non-driving roll support frame 100, the non-coagulated main strip of the cast steel moves in the width direction owing to the difference in deformation shape between the driving roll support frame 100 and the non- It is possible to solve the problem that unevenness is produced.

The protrusions 110 may be formed in, for example, a rectangular parallelepiped shape, and may be attached to the lower side of the side surface of the driving roll support frame 100 by welding or bolting. It is preferable to form the groove at the lower side of the side surface of the driving roll support frame 100 and then weld the steel roll since it is necessary to support the ironing force from the cast steel and the downward pressing load at the time of soft reduction.

The projecting portion 110 is effective to reduce the frame deformation deviation in the lower direction of the driving roll supporting frame 100, that is, in the direction approaching the driving roller 130. To this end, It is preferable that the roller support frame 100 is installed at a position of 1/2 or less of the height of the roll support frame 100.

The side frame 300 is provided with a stopper 310. The stopper 310 is preferably welded to the side frame in the same manner as the protrusion 110 provided on the driving roll support frame 100. The stopper 310 is effective to reduce the frame deformation deviation as it goes downward of the side frame 300, that is, in the direction approaching the driving roller 130. To this end, the lower end of the stopper 310 contacts the side frame 300 300) in a direction perpendicular to the longitudinal direction.

In addition, as shown in FIG. 6, the stopper 310 has a drive roll support frame side insertion portion 311 formed in a concave shape. The side surface of the driving roll support frame 100 is inserted into the driving roll support frame side insertion portion 311 and moves in the vertical direction. The side frame 300 supports the driving roll supporting frame in the casting direction and the driving roll supporting frame side insertion portion 311 guides the moving direction of the driving roll supporting frame 100 in the vertical direction . It is preferable to lubricate the guide contact surface of the drive roll support frame side insertion portion 311 by using lubricating oil such as grease. In the drawings, the reference character A denotes a driving roll cylinder load acting position.

Meanwhile, as shown in FIG. 7, the stopper 320 according to another embodiment may include a stopper protrusion 321 having convex and concave portions. At this time, it is preferable that a recessed stopper projection insertion portion 101 into which the stopper projection 321 is inserted is formed on a side surface of the driving roll support frame 100.

The driving roll support frame 100 can move in the downward direction for the purpose of pulling out a dummy bar and pulling a cast strip at an early stage of casting, It is possible to move only to a position where it contacts the lower surface of the stopper 310 of the frame 300. When the protrusion 110 contacts the stopper 310, the driving roller 130 and the idle rollers are aligned in substantially the same straight line or in the same plane.

Next, an experimental example of a continuous casting machine segment device according to an embodiment of the present invention will be described with reference to FIGS. 8 to 12. FIG.

FIG. 8 illustrates a three-dimensional modeling of a continuous casting machine segment device and a structural analysis software. FIG. 9 and FIG. 10 illustrate a three-dimensional modeling of a continuous casting machine segment device according to the prior art, 9 is a view showing a case where the hydraulic cylinder pressure is 100 bar, and Fig. 10 is a case where the hydraulic cylinder pressure is 200 bar. FIG. 11 is a graph showing a result of three-dimensional modeling of the apparatus of Korean Unexamined Patent Application Publication No. 10-2006-0022407 and structural analysis software, FIG. 12 is a graph showing the result of three-dimensional modeling of the continuous caster segment apparatus according to an embodiment of the present invention And a structural analysis software.

As shown in FIG. 8, in order to predict the effect of the continuous casting machine segmenting apparatus according to the embodiment of the present invention, the continuous casting machine segmenting apparatus was three-dimensionally modeled and deformation analysis was performed by structural analysis software. In the analysis method, the three-dimensional model is divided into finite elements, the material properties corresponding to each material are input, loads are applied to the clamping cylinders, and displacement of four bearing block supporting portions (131 to 134 in FIG. 6) is extracted . It is assumed that the bearing block supporting portion is supported by an elastic body corresponding to the cast steel.

(1) In the case where the stopper (60, Fig. 4) of the driving roll support frame is on the adjacent non-driving roll support frame (see Fig. 4) (3) In the embodiment of the present invention, the protruding portion 110 is formed on the lower side of the side surface of the driving roll support frame. When the stopper 310 is provided on the side frame, And the results were compared.

Figs. 9 and 10 show the results of the analysis of (1) above. 9 shows the result of analysis for a low pressure (pressure size 100 bar), and FIG. 10 shows an analysis result for a pressure size of 200 bar . 1, 2, 3 and 4 on the horizontal axis represent the positions of the four width-direction bearing blocks (refer to 131, 132, 133 and 134 in FIG. 6). 1 and 4 indicate both edge positions, and 2 and 3 indicate the middle position. The six color graphs indicate the number of roll support frames. That is, the colors 1, 2, 3, 5, and 6 are the deformation results of the non-driving roll support frame, and the color 4 is the deformation result of the driving roll support frame. 9 and 10, it can be seen that the deformation shape of the driving roll support frame is greatly different from the deformation shape of the remaining non-driving roll support frame, and due to such deformation deviation, the non- Thereby causing center segregation in the inside of the cast steel, thereby deteriorating the internal quality.

Fig. 11 shows the results of the analysis of (2) above. As shown, the deformed shape of the driving roll support frame is similar to the deformed shape of the non-driven roll supporting frame, but a large amount of deviation occurs at both ends. This is due to the stiffness degradation caused by forming slots in the frame.

12 shows the results of the analysis of the above (3). (Driving Roll Pressure: 50 bar) As shown in the figure, the deformed shape of the driving roll supporting frame is almost similar to the deformed shape of the non-driven roll supporting frame. Therefore, it is possible to prevent the flow of the non-solidified portion inside the cast steel and to produce a cast steel having an excellent internal quality.

As described above, according to the continuous casting machine segment device of the present invention, when the protrusion 110 and the stopper 310 are in contact with each other, the driving roll supporting frame 100 can no longer move upward, The movement space of the frame 100 can be limited and the stopper provided on the upper portion of the driving roll support frame 100 can be removed so that the deformation shape difference between the driving roll support frame 100 and the non- It is possible to solve the problem that the non-solidified main body of the main body is moved in the width direction and the main body piece is produced in the width direction.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Various modifications may be made by those skilled in the art.

100: drive roll support frame 110:
200: non-driven roll support frame
300: side frame 310, 320: stopper

Claims (5)

A driving roll support frame coupled to the piston and vertically moved so as to apply pressure downward; A non-driven roll support frame spaced symmetrically about the driving roll support frame; And a side frame coupled for securing the non-driven roll support frame,
A protruding portion is formed at a lower side of the side surface of the driving roll support frame and a stopper for restricting upward movement of the driving roll support frame is formed in the side frame by contacting the protruding portion.
The method according to claim 1,
And the lower end of the stopper is installed at a position of 1/2 or less of the height of the side frame.
The method according to claim 1,
And the upper end of the projecting portion is installed at a position of 1/2 or less of the height of the drive roll supporting frame.
The method according to any one of claims 1 to 3,
Wherein the stopper has a concave drive roll support frame side insert and the side of the drive roll support frame is inserted into the drive roll support frame side insert.
The method according to any one of claims 1 to 3,
Wherein the stopper includes a stopper projection having convex and concave portions and a recessed stopper projection insertion portion into which the stopper projection is inserted is formed on a side surface of the drive roll support frame.

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