WO2019125053A1

WO2019125053A1 - Finishing mill side guide device

Info

Publication number: WO2019125053A1
Application number: PCT/KR2018/016478
Authority: WO
Inventors: 김재원; 고영철
Original assignee: 주식회사 포스코
Priority date: 2017-12-22
Filing date: 2018-12-21
Publication date: 2019-06-27
Also published as: KR102010365B1; KR20190076717A

Abstract

A finishing mill side guide device is disclosed. The finishing mill side guide device comprises: side guides provided at both sides thereof along which a bar to be milled moves, and coming in contact with and guiding both sides of the bar to be milled so as to position the bar to be milled in the center portion of a mill; a cooling jacket provided inside the side guides; and a cooling water supplying part for supplying cooling water to the cooling jacket.

Description

Finishing rolling side guide device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn rolling side guide device capable of cooling heat generated in a liner of a side guide of a finishing mill.

Generally, the finishing rolling side guides are installed on both sides of a roller table on which a bar to be rolled moves.

This contouring side guide guides the bar to be rolled to be in the center of the rolling mill while the section of 850 to 1500 mm is closed or pulled out to open the bar to be rolled, ) To keep it from flowing.

A liner is provided on the inside of the side guide body to facilitate replacement of the side guide body when worn.

When such a high-temperature bar to be rolled is brought into contact with the side guide liner at a high speed, a steel band is formed at the liner position by contact friction, and gradually grows into a furrow.

Therefore, the grate is rolled together with a bar to be rolled which is fused to a liner of a high temperature or is rolled away to cause a fatal quality defect in the hot-rolled coil.

Therefore, in order to avoid the occurrence of quality coupling of the hot-rolled coil, cooling water is injected from the outside of the side guide to prevent the temperature of the friction portion between the liner and the bar to be rolled from rising excessively.

However, the temperature of the edge portion of the bar to be rolled is lowered, thereby causing an edge crack.

In order to minimize the occurrence of the gluing, a side guide is opened by widening the width of the bar to be rolled. However, when the strip is shaken, the quality of the winding is poor, There is a problem that the product error rate is reduced.

Further, in order to remove the creases welded to the liner, it is necessary for the drivers to stop production from time to time and to perform grinding work using a hand grinder or the like. As a result, the productivity improvement of hot rolled products is deteriorating and the fatigue of workers is increased .

According to one aspect of the present invention, there is provided a yarn rolling side guide device for preventing productivity of a hot rolled product from being improved by cooling a liner provided on a side guide to prevent an increase in fatigue of an operator due to a cover reducing operation I want to.

One embodiment of the present invention relates to a method of manufacturing a rolling mill, comprising: a side guide provided on both sides of a bar to be rolled to be moved and guided by both sides of a bar to be rolled so as to position a bar to be rolled at the center of the rolling mill; And a cooling water supply portion for supplying cooling water to the cooling jacket.

The side guides are provided so as to be movable from one side with the bar to be rolled therebetween to guide one side of the bar to be rolled and a second guide provided movably on the other side between the bars to be rolled, And a second guide for guiding the light beam.

The first guide includes a first guide body movably installed, a first side portion provided on the first guide body and in contact with an edge portion of the bar to be rolled, and a second side portion projecting from the upper edge of the first side portion in a bent state And a first bottom support portion provided under the first side portion and guiding and supporting the bottom surface of the bar to be rolled.

The second guide includes a second guide body movably installed, a second side portion provided on the second guide body and in contact with an edge portion of the bar to be rolled, and a second side portion protruding from the upper edge of the second side portion in a bent state And a second bottom support portion provided below the second side portion and guiding and supporting the bottom surface of the bar to be rolled.

The cooling jacket may include a first cooling jacket provided on the first guide portion and a second cooling jacket provided on the second guide portion.

The first cooling jacket includes a first side jacket connected to the cooling water supply unit through the first guide body to receive cooling water and installed in the first side portion, And a first bottom surface jacket disposed inside the first bottom surface jacket.

The second cooling jacket includes a second side jacket connected to the cooling water supply unit through the second guide body to receive the cooling water and installed in the second side portion thereof and a second side jacket connected to the second side jacket to receive cooling water, And a second bottom surface jacket disposed inside the second bottom surface jacket.

According to an embodiment of the present invention, a cooling jacket for moving cooling water is provided inside the side guide, so that the liner provided on the side guide effectively absorbs heat generated by friction with a bar to be rolled, can do.

Therefore, it is possible to prevent the liner from being formed in the liner, thereby improving the productivity of the hot-rolled product and effectively preventing the fatigue of the worker from being increased due to the liner reduction operation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view schematically showing a yarn rolling side guide apparatus according to an embodiment of the present invention; FIG.

Fig. 2 is a main part perspective view schematically showing a first guide of the side guide of Fig. 1; Fig.

FIG. 3 is a cross-sectional view of a main part schematically showing a state in which a cooling jacket and a cooling water supply unit according to an embodiment of the present invention are installed.

4 is a perspective view schematically showing a state in which a cooling water supply unit according to an embodiment of the present invention is installed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

In addition, since the sizes and thicknesses of the respective components shown in the drawings are arbitrarily shown for convenience of explanation, the present invention is not necessarily limited to those shown in the drawings.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" between the other parts. Also, when a part is referred to as "including " an element, it does not exclude other elements unless specifically stated otherwise.

2 is a perspective view schematically showing a first guide of the side guide of Fig. 1, and Fig. 3 is a plan view of the side guide of the present invention. Fig. FIG. 4 is a perspective view illustrating a state in which a cooling water supply unit is installed according to an embodiment of the present invention. FIG. 4 is a perspective view illustrating a state in which a cooling water supply unit is installed according to an embodiment of the present invention. For convenience of understanding, FIG. 2 shows a side liner and a bottom liner, and the like, and FIG. 3 shows a sectional view taken along the line III-III in FIG.

1 to 4, a finishing rolling side guide device 100 according to an embodiment of the present invention is provided on both sides of a bar 11 to be rolled, A cooling jacket 30 provided inside the side guide 10 and a cooling jacket 30 provided in the cooling jacket 30. The cooling jacket 30 is provided with a side guide 10 for guiding the bar 11 to be rolled in the center of the rolling mill, And a cooling water supply unit 40 for supplying the cooling water.

The side guide 10 can be installed to guide the bar 11 to be rolled in the center of the rolling mill to be rolled.

The side guides 10 are provided on both sides of a roller table of the rolling mill on which the bar 11 to be rolled moves and are provided on the roller table to provide a driving force for pressing the side of the bar 11 to be rolled A driving unit 20 is provided.

The side guide 10 includes a first guide 12 installed on the driving part 20 and movably installed on one side of the bar 11 to be rolled so as to guide one side of the bar 11 to be rolled, And a second guide 14 installed on the driving unit 20 and movably installed on the other side with the bar 11 to be rolled therebetween to guide the other side of the bar 11 to be rolled.

The first guide 12 may be installed to support one side of the bar 11 to be rolled.

The first guide 12 includes a first guide body 12a movably installed by the driving force of the driving unit 20 and a second guide body 12b provided on the first guide body 12a, A first upper protruding portion 12c provided on the upper side of the first side portion 12b and guiding the upper side of the bar 11 to be rolled and a second upper protruding portion 12c provided on the upper side of the first side portion 12b, And a first bottom surface supporting portion 12d provided on the lower side for guiding and supporting the bottom surface of the bar 11 to be rolled.

For example, referring to FIGS. 2 and 3, the first upper protrusion 12c and the first bottom surface supporting portion 12d may be formed by bending and protruding from the upper side and the lower side of the first side portion 12b, respectively .

The first guide body 12a may be installed on one side of the bar 11 to be rolled and may be installed to transmit the driving force of the driving unit 20. That is, the first guide body 12a can be installed to be movable in the width direction of the bar 11 to be rolled so as to transmit the pressing force toward the edge of the bar 11 to be rolled. Here, the 'width direction' means a direction perpendicular to a direction in which the bar 11 is moved in a direction from one edge to the other edge of the bar 11 to be rolled.

The first side portion 12b may be installed on the first guide body 12a so as to be moved with the movement of the first guide body 12a. The first side portion 12b is guided in contact with one side edge of the bar 11 to be rolled, and the side surface liner 12e can be provided on the surface to prevent contact damage.

The first upper protrusion 12c may be formed to extend along the longitudinal direction of the first upper portion 12b so as to protrude from the upper side of the first side portion 12b toward the center portion (bar to be rolled). The first upper protrusion 12c can guide the bar 11 to be rolled from above. Here, 'longitudinal direction' means the direction of extension of the bar to be rolled or the direction of progression of the bar to be rolled.

The first bottom surface supporting portion 12d is provided in a state of protruding from the lower side of the first side portion 12b in the direction of the center portion (bar to be rolled) and extends along the longitudinal direction. . The bottom surface liner 12f may be provided on the surface of the first bottom surface supporting portion 12d to prevent contact damage with the bar 11 to be rolled.

The second guide 14 can be installed so as to guide the other side of the bar 11 to be rolled.

The second guide 14 includes a second guide main body 14a movably installed by the driving force of the driving part 20 and a second guide main body 14b provided on the second guide main body 14a, A second upper protrusion 14c provided on the second side 14b to guide the upper side of the bar 11 to be rolled and a second upper protrusion 14c provided on the second side 14b, And a second bottom surface supporting portion 14d provided on the lower side for guiding and supporting the bottom surface of the bar 11 to be rolled.

For example, referring to FIGS. 2 and 3, the second upper protrusion 14c and the second bottom surface support 14d may be bent and protruded from the upper and lower sides of the second side 14b, respectively .

The second guide body 14a may be installed on the other side of the bar 11 to be rolled and may be installed to transmit a driving force of the driving unit 20. [ That is, the second guide body 14a can be installed to be movable in the width direction of the bar 11 to be rolled so that the second guide body 14a can transmit the pressing force toward the edge of the bar 11 to be rolled.

The second side portion 14b may be installed on the second guide body 14a so as to move along with the movement of the second guide body 14a. The second side portion 14b is guided in contact with one side edge of the bar 11 to be rolled, and the side surface liner 14e can be provided on the surface to prevent contact damage.

The second upper protrusion 14c is installed to protrude from the upper side of the second side 14b in the direction of the center (the bar to be rolled) and may extend along the longitudinal direction. The second upper protrusion 14c can guide the bar 11 to be rolled from above.

The second bottom surface supporting portion 14d is provided to protrude from the lower side of the second side portion 14b in the direction of the central portion (bar to be rolled) and extends along the longitudinal direction. The bottom surface of the bar 11 to be rolled is guided . The bottom surface liner 14f may be provided on the surface of the second bottom surface supporting portion 14d to prevent contact damage with the bar 11 to be rolled.

As described above, the bar 11 to be rolled is guided on both sides in the longitudinal direction by the first guide 12 and the second guide 14 of the side guide 10 during the process of being supplied to the rolling mill. A stable finishing rolling operation of the target bar 11 can be performed.

The side guide 10 may be provided with a cooling jacket 30 for cooling the heat generated during the guiding operation of the bar 11 to be rolled.

The cooling jacket 30 may include a first cooling jacket 31 provided in the first guide 12 and a second cooling jacket 33 installed in the second guide 14. [

The first cooling jacket 31 includes a first side jacket 31a connected to the cooling water supply unit 40 through the first guide body 12a and supplied with cooling water and installed inside the first side 12b, And a first bottom surface jacket 31b connected to the first side surface jacket 31a and supplied with cooling water and installed inside the first bottom surface support portion 12d. At this time, the first side portion 12b may be provided with a hole 39 into which a pipe for supplying cooling water is inserted.

The first side jacket 31a may be installed in the first guide body 12a in a state of being connected to the cooling water supply unit 40 through a cooling water control valve 32. [

The plurality of first side jackets 31a are provided along the longitudinal direction of the first side portion 12b so that the heat generated by the guide operation of the bars 11 to be rolled can be adequately cooled.

For example, referring to FIG. 2, the first side jacket 31a may include a concave space inside the first side portion 12b, and the concave space may be configured to be covered by the side liner 12e. That is, the first side jacket 31a may be a space defined by the concave space formed inside the first side portion 12b and the side liner 12e covering the concave space. Accordingly, the frictional heat of the side liner 12e generated by the contact with the bar 11 to be rolled can be cooled through the cooling water passing through the first side jacket 31a. This is also applicable to the second cooling jacket 33 to be described later.

The first bottom surface jacket 31b is connected to the first side surface jacket 31a and is installed inside the first bottom surface support portion 12d so as to be able to supply cooling water to the inside of the first bottom surface support portion 12d .

The first bottom surface jacket 31b is provided with a cooling water discharge pipe (not shown) to discharge the cooling water.

For example, referring to FIG. 2, the first bottom jacket 31b includes a concave space inside the first bottom surface support portion 12d while being connected to the

first side jacket

31a, 12f. &Lt; / RTI > That is, the first bottom surface jacket 31b may be a space defined by a concave space formed inside the first bottom surface supporting portion 12d and a bottom surface liner 12f covering the concave space. Thus, the frictional heat of the bottom liner 12f generated by the contact with the bar 11 to be rolled through the cooling water passing through the first bottom surface jacket 31b can be cooled. This is also applicable to the second cooling jacket 33 to be described later.

The second cooling jacket 33 includes a second side jacket 33a connected to the cooling water supply unit 40 through the second guide body 14a and supplied with cooling water and installed inside the second side 14b, And a second bottom surface jacket 33b connected to the second side jacket 33a and supplied with cooling water and installed inside the second bottom surface support portion 14d.

The second side jacket 33a may be installed in the second guide body 14a in a state of being connected to the cooling water supply unit 40 through the cooling water control valve 34. [

The plurality of second side jackets 33a are provided along the longitudinal direction of the second side portion 14b so that the heat generated by the guide operation of the bars 11 to be rolled can be adequately cooled.

The second bottom surface jacket 33b is connected to the second side jacket 33a and is installed inside the second bottom surface supporting portion 14d and is installed so as to be capable of supplying cooling water to the inside of the second bottom surface supporting portion 14d .

The second bottom surface jacket 33b is provided with a cooling water discharge pipe to discharge the cooling water.

The cooling water supply unit 40 is connected to the main pipe 41 and the main pipe 41 to which the cooling water is supplied and is connected to the first cooling jacket 31 and the second cooling jacket 33, (43).

Therefore, the cooling water supplied through the main pipe 41 can be smoothly supplied into the cooling jacket 30 through the branch pipe 43.

As described above, in this embodiment, in the operation process of guiding the bar 11 to be rolled by the operation of the side guide 10, the cooling water generated in the cooling

water side liner

12e, 14e and the

bottom liner

12f, 14f The heat can be stably absorbed by the heat exchange system and cooled.

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, Of course.

(Explanation of Symbols)

10: side guide 11: rolled bar

12: first guide 12a: first guide body

12b: first side portion 12c: first upper projection portion

12d: first

bottom support portion

12e, 14e:

12f, 14f: bottom liner 14: second guide

14a: second guide body 14b: second side

14c: a second upper projection 14d: a second bottom support

20: driving part 30: cooling jacket

31: first cooling jacket 31a: first side jacket

31b: first bottom surface jacket 33: second cooling jacket

33a: second side jacket 33b: second bottom face jacket

40: cooling water supply part 41: main piping

43: Branch piping

Claims

A side guide installed on both sides of the rolling target bar to be guided to both sides of the rolling target bar to position the rolling target bar in the center of the rolling mill;

A cooling jacket installed inside the side guide; And

A cooling water supply unit for supplying cooling water to the cooling jacket;

Wherein the first and second guide rollers are rotatable.
The method according to claim 1,

The side guide

A first guide movably installed at one side with the bar to be rolled therebetween to guide one side of the bar to be rolled; And

A second guide movably installed on the other side with the bar to be rolled therebetween to guide the other side of the bar to be rolled;

Wherein the first and second guide rollers are rotatable.
3. The method of claim 2,

The first guide

A first guide body movably installed in a width direction of the bar to be rolled;

A first side portion provided on the first guide body and in contact with an edge portion of the bar to be rolled;

A first upper protrusion installed on the first side and guiding the upper side of the bar to be rolled; And

A first bottom surface supporting portion provided below the first side portion to guide and support a bottom surface of the bar to be rolled;

Wherein the first and second guide rollers are rotatable.
The method of claim 3,

The second guide

A second guide body movably installed in a width direction of the bar to be rolled;

A second side portion provided on the second guide body and having an edge portion of the bar to be rolled contacted and supported;

A second upper projection provided on the second side and guiding the upper side of the bar to be rolled; And

A second bottom surface supporting portion provided below the second side portion and guiding and supporting the bottom surface of the bar to be rolled;

Wherein the first and second guide rollers are rotatable.
5. The method of claim 4,

The cooling jacket includes:

A first cooling jacket installed in the first guide portion; And

A second cooling jacket installed in the second guide portion;

Wherein the guide rail comprises a guide rail.
6. The method of claim 5,

Wherein the first cooling jacket comprises:

A first side jacket connected to the cooling water supply unit through the first guide body to receive cooling water and installed in the first side portion; And

A first bottom surface jacket connected to the first side jacket and supplied with cooling water and installed inside the first bottom surface support portion;

Wherein the guide rail comprises a guide rail.
6. The method of claim 5,

The second cooling jacket includes:

A second side jacket connected to the cooling water supply unit through the second guide body to receive cooling water and installed in the second side portion; And

A second bottom surface jacket connected to the second side jacket and supplied with cooling water and installed inside the second bottom surface support portion;

Wherein the guide rail comprises a guide rail.