KR20150134450A

KR20150134450A - Strip guide apparatus

Info

Publication number: KR20150134450A
Application number: KR1020140060748A
Authority: KR
Inventors: 전병호; 김명식; 정광우
Original assignee: 주식회사 포스코
Priority date: 2014-05-21
Filing date: 2014-05-21
Publication date: 2015-12-02

Abstract

According to an aspect of the present invention, there is provided a strip guiding apparatus improved in structure so as to buffer an amount of impact generated in a side guide due to warping of a strip, and a strip guiding apparatus according to an aspect of the present invention includes: A pair of side guides provided on both sides of the entrance side of the rolling mill for guiding the entry of the strip; And a shock buffer provided to support the side guide, and to shock the side guide to retract and resiliently return when the strip contacts the side guide, and to shock the impact transmitted from the strip.

Description

[0001] STRIP GUIDE APPARATUS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strip guiding apparatus, and more particularly, to a strip guiding apparatus that is used to prevent a strip conveyed in a continuous rolling process and to transport the strip.

Generally, the continuous rolling process is a process for continuously producing a coil having a desired thickness and width by rolling a strip continuously.

In the conventional continuous rolling process, a plurality of rolling mills 10 are disposed, and the strip S is continuously passed between the rolling mills 10 and rolled. As a rolling mill 10 used in finish rolling in a continuous rolling process, a pair cross rolling mill 10 in which upper and lower rolling rolls 12 and 14 are inclined is mainly used.

Such a fair cross type rolling mill 10 can be skewed in the process of feeding the strip S in accordance with the arrangement angle of the upper and lower rolling rolls 12 and 14, that is, the deviation of the cross angle.

The conventional rolling mill 10 is provided with a side guide 30 for guiding the movement of the strip S in front of each rolling mill 10 and the strip S is fed through the side guide 30, Thereby preventing the meandering movement.

To this end, the side guides 30 include a base frame 32 positioned on the lower side of the traveling line of the strip S, and the pair of side guides 30 are provided on both sides in the width direction of the strip S A side plate 34 to be disposed can be provided.

The side plate 34 is coupled with a DC motor 38 provided on the base frame 32 in conjunction with a screw shaft 36 having a helical portion inclined in the other direction with respect to the center, .

This side plate 34 can be moved symmetrically in the width direction as the DC motor 38 rotates the screw shaft 36 according to the width of the strip S, (S) and guiding the movement of the strip (S).

On the other hand, in the conventional continuous rolling process, when both ends of the strip S are inserted into the rolling mill 10 and passed through it, the sagging does not occur largely due to the tension. Before the strip S passes through the downstream mill 10 and is supplied to the front end mill 10, that is, before the end of the strip S is fed to the next mill 10, The strip S can not be supplied to the rolling mill 10 at the front end but collides with the side guide 30 that guides the movement of the strip S to the rolling mill 10 at the front end The strip S is bent and can not be supplied to the rolling mill 10 at the front end. The phenomenon in which the strip S is not normally supplied to the rolling mill 10 at the front end is called a " miss roll ".

Conventionally, when a misrope is generated in the process of moving the strip S, the operation is stopped until the misroiling is processed, so that the slab, bar, and the like being processed in the previous step of the finish rolling mill 10 Therefore, these slabs, bars, and the like are required to be subjected to a re-heat treatment process during the operation, thereby lowering the overall production delay and the error rate.

Conventionally, various facility gaps are managed to reduce the cross-angle deviation of the rolling rolls 12 and 14 during conveyance of the strip S, thereby preventing the strip S from skewing.

However, conventionally, a large maintenance ratio has been put into the measurement, adjustment, and exchange of equipment gaps and deviations of the rolling rolls 12 and 14 and the like.

Recently, the angle of the side guide 30 for guiding the movement of the strip S is adjusted or the arrangement of the side guides 30 is improved to prevent the leading end of the strip S from being caught. However, There is a limit to the complete solution, and continuous improvement is required.

In addition, in the related art, the durability of the side guide 30 and the equipment supporting the side guide 30 is reduced due to the amount of impact generated in the process of the sliver S moving in contact with the side guide 30, Frequent maintenance of equipment is required, and productivity is also decreasing due to frequent maintenance. In addition, in the related art, noise caused by the contact between the strip S and the side guide 30 causes the work environment to deteriorate.

It is an object of the present invention to provide a strip guiding apparatus improved in structure so as to buffer an amount of impact generated in a side guide due to warping of the strip.

A strip guide apparatus according to one aspect of the present invention includes a pair of side guides provided on both sides of an inlet side of a rolling mill for rolling a strip to guide the entry of the strip; And a shock buffer provided to support the side guide, and to shock the side guide to retract and resiliently return when the strip contacts the side guide, and to shock the impact transmitted from the strip.

Here, the side guides may include a base frame provided at a lower portion on the movement line of the strip, a support installed in the base frame in the width direction of the strip, and a support member movably coupled to the support, And a shock absorber installed on the guide plate to elastically support the rear surface of the guide plate. The shock absorber includes a pair of support plates, and a guide plate that contacts the strip and guides movement of the strip, .

The side guide may include a base frame provided at a lower portion of the strip on the movement line, a support provided to the base frame in the width direction of the strip, and a support member movably coupled to the support, A pair of support plates, and a guide plate for contacting the strip and guiding the movement of the strip, the shock absorber comprising: an air shock absorber including a sealed tube; An air pump and a control unit for controlling the operation of the air pump to adjust the amount of compressed air in the tube corresponding to the impact force transmitted to the guide plate.

The shock absorber may further include an impact amount sensing unit provided between the guide plate and the shock absorber to sense an impact amount. The control unit may control the operation of the air pump according to an amount of the impact sensed by the impact amount sensing unit, The elastic modulus of the air shock absorber can be varied.

According to the embodiment of the present invention, it is possible to absorb the amount of impact generated when the strip traveling in a sideways contact with the side guide, thereby improving the durability of the equipment and preventing equipment troubles in advance, thereby contributing to improvement in productivity .

1 is a plan view schematically showing a strip guide apparatus of a continuous rolling process according to the prior art.
Fig. 2 is a side view schematically showing a strip guide apparatus of a continuous rolling process according to the prior art; Fig.
3 is an enlarged plan view of a conventional strip guiding apparatus.
4 is an enlarged plan view of a strip guide apparatus according to an embodiment of the present invention.
5 is an enlarged plan view of a strip guide apparatus according to another embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The shape and the size of the elements in the drawings may be exaggerated for clarity and the same elements are denoted by the same reference numerals in the drawings.

4 is an enlarged plan view of a strip guide apparatus according to an embodiment of the present invention.

Referring to FIG. 4, the strip guiding apparatus according to the embodiment of the present invention can be utilized to guide the conveyance of the strip between a plurality of rollers 10, which are provided continuously to continuously roll the strip.

A rolling machine 10 of a pair cross system in which upper and lower rolling rolls are arranged at an angle different from each other is mainly used as the rolling machine 10. In the course of passing through the rolling machine 10, The strip S can be skewed and moved by the inclination angle of the slits 12 and 14, the gap or the tension of the strip S.

When the both ends of the strip S are engaged with the rolling mill 10, there is no significant skew due to the generation of tension in the strip S. However, before the front end of the strip S is engaged with the rolling mill 10, Meandering can occur.

Therefore, in order to prevent the strip S from skewing, the strip guide apparatus of the present embodiment is provided with the strip S, which is discharged from the first rolling mill outlet, is fed to both sides of the inlet side of the second rolling mill 10 so as to enter the inlet of the second rolling mill 10 And may include a pair of side guides 130 provided.

The side guides 130 are installed in front of the respective mills 10 and can serve to guide the strips S supplied from the first mills to be centered and introduced into the second mills 10.

To this end, the side guides 130 include a base frame 132 positioned below the traveling line of the strip S, and a pair of support plates 134 are movably provided on the base frame 132 .

Preferably, the pair of support plates 134 can be installed so as to be movable in directions opposite to each other. At this time, when the width of the strip S is small, the support plates 134 can be brought close to each other in the width direction, and when the width of the strip S is large, Are spaced apart in the width direction and can be varied corresponding to the width of the strip (S).

To this end, a plurality of rails 136 for guiding movement may be connected between the base frame 132 and the support plate 134.

A screw shaft 138 having a helical portion inclined in the other direction with respect to the center is connected to the base frame 132. The screw shaft 138 is provided on one side of the base frame 132 And may be rotatably provided in combination with a DC motor (140).

Further, a lower end of the support plate 134 may be provided with a coupling block (not shown) connected to the screw shaft 138.

The side guide 130 rotates the screw shaft 138 by the operation of the DC motor 140 to move the support plate 134 in the width direction.

In addition, the side guide 130 may include a guide plate 142 that contacts the strip S and guides the movement of the strip S.

Here, the guide plate 142 is coupled to and supported by the impact buffering part 150. The impact buffering part 150 is coupled to the support plate 134 and moves in the width direction along the width of the strip S And the spacing between the support plates 134 can be adjusted.

The impact buffering unit 150 can buffer the impact generated when the strip S contacts the side guide 130, that is, a thrust force shock.

In this embodiment, the shock absorber 150 may include a shock absorber 150.

The shock absorber 150 includes a cylinder 152 in which a fluid having a different compression ratio is accommodated and an actuating rod 154 that is detachably inserted into the cylinder 152. The actuating rod 154 is provided with a spring 156, A coil spring 156 may be coupled.

The shock absorber 150 cushions the impact when the strip S moving in a sideways direction is pushed outward in the width direction by an impact generated when the strip S moves in contact with the guide plate 142, Can be elastically supported so as to return to the original position.

In this embodiment, the shock absorber 150 can adjust the damping coefficient or the damping performance by adjusting the elastic modulus (k) of the spring 156 during design and manufacture.

Since the elastic modulus k of the spring 156 applied to the shock absorber 150 can not be adjusted after the initial installation, the modulus of elasticity k can not be adjusted. Therefore, the contact force of the steel type, that is, the Thrust Force shock In case of a difference, it is possible to control the distance by which the spring extends, thereby controlling the shock mitigation and attenuation performance.

5 is an enlarged plan view of a strip guide apparatus according to another embodiment of the present invention.

Referring to FIG. 5, in this embodiment, the shock absorber 250 may include an air shock absorber 250. The air shock absorber 250 may include a cylinder 252 in which a fluid having a different compression ratio is accommodated and an operation rod 254 that is removably inserted into the cylinder 252, And may include an enclosed tube 256 for generating an elastic force.

The air shock absorber 250 can obtain the elastic force through the process of compressing and expanding the air contained in the closed tube 256.

The air shock absorber 150 may also include an air pump 260 that supplies compressed air into the enclosed tube 256 which supplies compressed air within the enclosed tube 256, Or adjust the modulus of elasticity in the tube 256.

The air shock absorber 150 also includes a control unit 262 that controls the operation of the air pump 260 to adjust the amount of compressed air in the tube 256 corresponding to the impact force transmitted to the guide plate 142 .

Preferably, the impact buffering unit 250 may further include an impact amount sensing unit (not shown) for sensing the amount of impact between the guide plate 142 and the shock absorber 150. For example, the impulse sensing unit may be installed on the rear surface of the guide plate 142, or may be installed on the operation rod 154 of the shock absorber 150 to sense the amount of impact.

A load cell or a pressure sensor may be used as the impact amount sensing unit.

The control unit 262 receives the amount of the impact detected by the impact amount sensing unit and can control the operation of the air pump 260 so that the elasticity coefficient of the tube 256 can be adjusted according to the amount of the impact.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. It will be clear to those who have knowledge.

10: rolling machine 12, 14: rolling roll
130: side guide 132: base frame
134: Support plate 136: Rail
138: screw shaft 140: DC motor:
142: guide plate 150: shock absorber (shock absorber)
152: cylinder 154: working rod
156: Spring (coil spring)

Claims

A pair of side guides provided on both sides of the inlet side of the rolling mill for rolling the strip to guide the entry of the strip; And
And a shock buffer provided to support the side guide and retract and resiliently return the side guide when the strip contacts the side guide and to buffer the impact transmitted from the strip.

The method according to claim 1,
The side guide includes a base frame provided on a lower side of a moving line of the strip, a support provided in the base frame in a width direction of the strip, and a pair movably coupled to the support, And a guide plate for guiding the movement of the strip in contact with the strip,
Wherein the shock absorber includes a shock absorber mounted on the guide plate and elastically supporting the rear surface of the guide plate.

The method according to claim 1,
The side guide includes a base frame provided on a lower side of a moving line of the strip, a support provided in the base frame in a width direction of the strip, and a pair movably coupled to the support, And a guide plate for guiding the movement of the strip in contact with the strip,
The shock absorber may include an air shock absorber including a sealed tube, an air pump for supplying compressed air into the tube, and a control unit for controlling the amount of compressed air in the tube, And a control section for controlling the operation of the air pump.

4. The shock absorber according to claim 3,
And an impact amount sensing unit provided between the guide plate and the shock absorber for sensing an impact amount,
Wherein the control unit controls the operation of the air pump according to the amount of the impact detected by the impact amount sensing unit to vary the elastic modulus of the air shock absorber.