KR20180067138A - Scarfing Apparatus and Control Method using the same - Google Patents

Abstract

The present invention relates to a scarfing apparatus, and a method for controlling a scarfing apparatus using the same, wherein the apparatus comprises: a transfer unit transferring slab along a transfer line; a scarfing unit processing a surface of the transferred slab; a detecting apparatus detecting a bending height of the slab; a horizontal spray unit spraying high-pressure water toward the slab; and a servo motor. Moreover, the servo motor can rotate the horizontal spray unit in accordance with a signal of the detecting unit so as to vary a spray position of the high-pressure water. Accordingly, the spray height of the high-pressure water can be varied so that scarfing scales welded in the slab can be effectively removed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scarfing apparatus,

The present invention relates to a scarping device and a scarping device control method using the same. More particularly, the present invention relates to a scarfing apparatus that removes scarf fusion spots by varying the spray height of high-pressure water in accordance with the bending height of a slab during a scarfing operation of the slab, and a scarfing apparatus control method using the scarfing apparatus.

Generally, the scarfing process is a process for removing surface flaws formed on the surface of a slab produced by continuous casting of molten steel in a casting process.

Scarping machines that perform this scarping process may be provided with utilities such as high pressure oxygen, gas, nitrogen, air, high pressure water, low pressure water, and circulating water. Here, the scarping operation is performed by heating the slab surface with a flame caused by a flame reaction of oxygen and gas, and melting and oxidizing the high-pressure air, thereby removing surface flaws in the slab.

On the other hand, slabs to be scarfed for the production of clean steel can be cast in a steel making process and cooled in a bed of YARD.

1 to 3, a scarfing machine 2 for performing a scarifying operation is located inside the smoke hood 3 and a slab 20 is mounted on one side thereof with a positioning roller 5, to which the positioner 5 is fixed, Can be mounted on the conveying roller 4 of the roller table in a state of being in close contact with the conveying roller 6 side.

After the pinch roll 7 is lowered and the positioning of the positioner 5 is completed, the pinch roll 7 is driven so that the slab 20 advances to the scarping machine 2.

When the slab 20 is stopped below the unit 8, a scarping operation is performed by a constant work sequence. That is, when the slab 20 stops at the pre-heating position (Closing Position), the unit 8 preheats the surface and side edges of the slab 20 and blows the compressed air to remove the surface flaws of the slab 20.

On the other hand, the fluid flowing in the scarping machine 2 through the pumping of the circulating water pump flows through the manifolds 12, 13 provided on the top and side of the scarping machine 2, Is returned to the tank (not shown) along a constant channel provided in the utility line 10 supplied to the shoe 9 and installed in the scarping machine 2. [ At this time, instruments, sensors, pressure gauges, and the like installed in various utility lines 10 must be in a steady state. Dust, melting and scattering scale generated in the scarifying operation are collected in the electrostatic precipitator, Along with the water along the flow path provided inside the scaled feet.

On the other hand, the melts flowing downward from the surface and the side surface of the slab 20 during the scarping operation as described above are fused to the edge surface of the rear surface of the slab 20 and the side surface of the scarifying area, Scarf fusion welding). Such a scarping scale 11 has a slight difference depending on the cooling temperature of the slab 20, the scarping speed, the operation method of the operator, etc., but the quality of the clean steel is lowered.

In addition, the scarf scale 11 remaining on the scraping scale 11 during the scraping scraping operation and the difficulty in inspecting the surface scratch on the slab 20 may become a risk factor for safety hazards such as burns and abrasions.

In addition, since the scarping scale 11 remaining on the scaffolding scraper 11 due to the defective operation of the scarf fusion splicing scoop falls on the scaffolding, which causes the facility scuffle and sensor malfunction, And the delay in delivery due to the delay in steel production.

For example, the scaling scale 11 may accumulate in the smokehood 3 in the facility and the peripheral equipment, resulting in clogging of the water, resulting in facility troubles.

In addition, the scraped scales 11 which have not been removed cause quality defects such as edge scab, black line and the like in the slab surface quality (post-process rolling process) in the slab surface correction process.

That is, the scarping scale 11 generated during scarping may cause a lump, a surface quality degradation of the slab 20 due to the scarping scale 11, a work delay due to water blockage, and a safety accident due to the worker scale lump removal operation Causing risk factors and lower productivity. As a result, there is a need for safety hazards, work lead time delays, worker safety, and facility trouble improvement to remove the clogs in the peripheral equipment.

The related invention is disclosed in Applicant's Utility Model No. 20-1995-0003993 (1995.05.18) of the present applicant, which is a device for removing continuous cast slabs.

SUMMARY OF THE INVENTION The present invention provides a pressure variable scarping device capable of varying a pressure applied to a piston.

Accordingly, there is provided a pressure variable scarping apparatus capable of minimizing the operation of the booster booster or stopping the operation and supplying the converter gas to the power plant.

There is also provided a scarfing device capable of minimizing the flow and movement of water when varying the pressure applied to the piston using water.

The problems to be solved by the embodiments are not limited to the above-mentioned problems, and other problems not mentioned here can be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention, there is provided a conveying apparatus comprising: a conveying unit for conveying a slab along a conveying line; A scarifying unit for processing the surface of the slab being conveyed; A sensing device for sensing a bending height of the slab; A horizontal spray unit for spraying high-pressure water toward the slab; And a servomotor, wherein the servomotor rotates the horizontal spray unit according to a signal of the sensing device to vary the injection position of the high-pressure water.

The controller may further include a controller for controlling the servo motor to vary the injection position of the high-pressure water based on the information about the bending height of the slab detected by the sensing device.

The control unit may control the rotation speed of the servo motor in consideration of the moving speed of the slab.

The horizontal injection unit may include a T-shaped elbow; A coupler disposed between one side of the T-elbow and the servo motor for transmitting a rotational force of the servo motor to the T-elbow; A flange portion disposed on the other side of the T-shaped elbow; A cylindrical nozzle for spraying the high-pressure water; And a connection pipe disposed between the nozzle and the flange portion. The center C2 of the nozzle may be spaced radially from the center C1 of the flange portion.

The horizontal injection unit may further include a circular plate disposed inside the coupler.

Further, the nozzle can be rotated from 0 to 90 degrees with respect to the center (C1) of the flange by the servomotor.

The sensing device may be spaced apart from the horizontal injection unit by a predetermined distance L in a direction opposite to the conveying direction of the slab.

Preferably, the sensing device may include a light emitting unit for emitting a laser beam and a light receiving unit for receiving the laser beam emitted from the light emitting unit.

Here, the light emitting unit may include: a light emitting body support; A light emitting body arranged to be movable up and down on the light emitting body support base; And a plurality of light emitting devices that are vertically spaced apart from each other in the light emitting body.

The light-receiving unit includes a light-receiving body support; A light receiving body arranged to be movable up and down on the light receiving body support; And a plurality of light receiving elements disposed on the light receiving body so as to be vertically spaced apart from each other, wherein the light receiving element receives a laser beam emitted from the light emitting element to sense a bending height (H) of the slab.

In addition, the nozzle may be detachably disposed in the connection pipe.

Further, it may further include a supply pipe arranged at one side of the T-elbow to supply the high-pressure water to the T-elbow.

Here, the supply pipe may be formed of a flappable material.

Meanwhile, the controller may move the scarping unit according to a signal of the sensing device, and then move the scarping unit.

According to an embodiment of the present invention, there is provided a method of controlling a scarping apparatus using a scarping apparatus, the method comprising: transferring a slab to a scarping unit; Sensing a bending height of the slab using a sensing device; Treating the surface of the slab being conveyed using a scarifying unit; Spraying high-pressure water toward the slab using a horizontal injection unit; And varying the injection position of the high-pressure water by using a servo motor. According to a signal of the sensing device, the servomotor rotates the horizontal injection unit to change the injection position of the high-pressure water, Control method.

In the step of transferring the slab to the scarping unit, the slab may be moved toward the scarifying unit at a predetermined speed by adjusting the rotational speed of the pinch roll of the scarifying unit.

The rotation speed of the servo motor can be controlled based on the moving speed of the slab.

According to the scarfing apparatus and the scarping apparatus control method of the present invention having the above-described structure, the spray height of the high-pressure water can be varied according to the shape of the slab, thereby effectively removing the scarf scale welded to the slab.

That is, the scarping device and the scarping device control method control the servo motor based on the bending height (H) of the slab detected by the sensing device to control the jetting height of the high-pressure water, Can be effectively removed.

Further, since the bending shape of the slab is a curved shape when viewed from the side, it is possible to remove the scaling scale fused to the slab more effectively by adjusting the rotation speed of the nozzle.

1 is a front view showing a scarping machine,
Figure 2 is a rear view showing the scarfing machine,
Figure 3 is a diagram showing scaling scales generated in a slab after a scarping operation,
4 is a view showing a scarping device according to an embodiment of the present invention,
5 is a side view showing a scarfing unit, a sensing device and a horizontal injection unit of a scarifying device according to an embodiment of the present invention,
6 is a view showing water vapor and flame generated in the scarifying apparatus according to the embodiment,
7 is a view showing a light emitting portion and a light receiving portion of the sensing device arranged in the scarping device according to the embodiment,
8 is a view showing the up-and-down movement of the sensing device arranged in the scarping device according to the embodiment,
9 is a view showing a slab sensed by a sensing device disposed in a scarping device according to an embodiment,
10 to 12 are a perspective view, an exploded perspective view and a side view showing the horizontal injection unit and the servo motor of the scarfing apparatus according to the embodiment,
13 is a view showing a state in which the horizontal injection unit rotated by the servomotor of the scarping apparatus according to the embodiment injects high pressure water,
14 is a view showing a relationship in which the jetting height of the high-pressure water is adjusted according to the signal of the sensing device of the scarifying device according to the embodiment,
15 is a block diagram showing the control relationship of the control unit of the scarping apparatus according to the embodiment,
16 is a view showing a control unit of the scarping apparatus according to the embodiment,
17 is a block diagram showing a scarping device control method according to the embodiment.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

The scarfing apparatus 1 according to the embodiment of the present invention senses the shape of the slab 20 and varies the spray height of the high-pressure water according to the shape of the slab 20 The scalling scale 11 welded to the slab 20 can be effectively removed.

The scarping device 1 varies the jetting height of the high pressure water jetted away from the side surface 21 of the slab 20 in accordance with the bending shape of the slab 20, The scalloping scale 11 welded to the base 22 can be removed.

Particularly, the scarping device 1 adjusts the spray height of the high-pressure water jetted onto the upper surface 22 of the slab 20 in accordance with the bending height H of the shape of the slab 20, The scalloping scale 11 adhered to the scalloping scale 11 can be effectively removed.

4 to 16, the scarifying apparatus 1 includes a conveying unit 100 for conveying the slab 20 along a conveying line, a frame 200 disposed on a conveying line of the slab 20, A scarf unit 300 disposed in the frame 200, a sensing device 400, a horizontal injection unit 500 for injecting high-pressure water toward the side of the slab 20, A servomotor 600, a supply pipe 700 for supplying water to the horizontal injection unit 500, and a control unit 800. The control unit 800 may control the transfer unit 100, the scarping unit 300, the sensing unit 400, and the servo motor 600.

The transfer unit 100 may include a plurality of rollers 110 and a pinch roll 120. Then, the slab 20 is moved along the transfer line by the rotating roller 110.

The pinch roll 120 is a device for moving the slab 20 at a constant speed.

4 and 5, the pinch rolls 120 may be disposed on the front and rear sides of the frame 200, respectively, on the basis of the conveyance of the slabs 20. Here, the pinch roll 120 may have a columnar shape and a length corresponding to the width direction of the slab 20.

Accordingly, the pinch roll 120 on one side serves to draw the slab 20 into the frame 200 and the other pinch roll 120 on the other side serves to slide the slab 20 passing through the frame 200 to the outside It takes the role of fetching. The pinch roll 120 may be composed of an upper roll and a lower roll.

That is, as the pinch roll 120 is lowered and driven, the slab 20 can move toward the scarping unit 300. Therefore, the moving speed of the slab 20 can be adjusted by the rotational speed of the pinch roll 120. [ Accordingly, the moving speed of the slab 20 can be obtained through the rotational speed of the pinch roll 120. Here, the rotation speed of the pinch roll 120 may be controlled by the control unit 800. [

On the other hand, the pinch roll 120 can be divided into a front pinch roll 121 and a rear pinch roll 122 based on the frame 200.

The frame 200 may be disposed on the transfer line of the slab 20. The scatting unit 300 can be disposed in the frame 200, and the frame 200 can support the scarping unit 300. [

The scarfing unit 300 can process the surface of the slab 20. Here, the scarping unit 300 can be moved vertically and horizontally by a driving device (not shown). Accordingly, the scarping unit 300 can be adjusted in position by the control unit 800 according to the shape of the slab 20 sensed by the sensing device 400.

The scarfing unit 300 can remove surface defects of the slab 20 by melting the surface of the slab 20 by spraying high-pressure oxygen and combustion gas (LNG or the like) to the slab 20. [ For example, surface defects of the slab 20 may be flaws or the like generated on the surface of the slab 20.

That is, the scarifying unit 300 can lift the surface of the slab 20 to a predetermined temperature by using oxygen and LNG gas, and then melt the high-pressure oxygen to remove the defects.

The sensing device 400 may measure the shape of the slab 20. In detail, the sensing device 400 can sense the bending height H of the slab 20.

As shown in Fig. 6, steam and flame are generated by the scarping operation, and it is difficult for the operator to secure a field of view. That is, it is very difficult to ensure the visibility due to the glare caused by the flame generated by the scarping operation and the steam generated as the high-pressure water is sprayed to the high-temperature slab 20.

Therefore, the sensing device 400 can sense the bending height H of the slab 20 by irradiating the laser toward the side surface 21 of the slab 20. At this time, as shown in FIG. 5, the sensing device 400 may be spaced apart from the horizontal injection unit 500 by a predetermined distance L and spaced forward.

That is, the sensing device 400 may be disposed a predetermined distance L away from the conveying direction of the slab 20.

Accordingly, the control unit 800 controls the injection of the high-pressure water by the horizontal injection unit 500 in consideration of the time when one area of the slab 20, which is sensed while passing through the sensing device 400, reaches the horizontal injection unit 500. [ The height can be adjusted.

For example, the control unit 400 may control the injection height of the high-pressure water by the horizontal injection unit 500 in consideration of the moving speed and the separation distance L of the slab 20. Accordingly, the horizontal injection unit 500 can effectively remove the scraping scale 11 welded to the slab 20. [

The sensing device 400 may include a light emitting portion 410 for irradiating a laser disposed between the slab 20 and a light receiving portion 420 for receiving the irradiated laser. The light emitting unit 410 and the light receiving unit 420 may be installed facing each other with the slab 20 interposed therebetween. At this time, the light emitting unit 410 and the light receiving unit 420 may be spaced apart from the side surface 21 of the slab 20, respectively.

Here, the light emitting portion 410 irradiates a laser toward the light receiving portion 420, and the irradiated laser is received by the light receiving portion 420.

7, the light emitting unit 410 may include a light emitting body 411, a light emitting body support base 412, and a plurality of light emitting elements 413 disposed in the light emitting body 411. Referring to FIG.

The light emission main body 411 may be disposed on the light emission main body support 412 so as to be movable up and down. Accordingly, the height of the light emitting body 411 can be adjusted corresponding to the thickness of the slab 20 to be conveyed through the conveyance unit 100. For example, in the case of the slab 20 conveyed through the conveyance unit 100, the thickness required for each product in which the slab 20 is used may be different, and the height of the light emitting main body 411 may be adjusted, 413 can be positioned at predetermined positions where the slab 20 can be sensed.

The light emitting element 413 is disposed in the light emitting body 411 and irradiates the laser toward the light receiving portion 420.

Each of the plurality of light emitting devices 413 may be arranged at a predetermined spacing distance d up and down. Here, each of the plurality of light emitting devices 413 may include a first light emitting device 413a, a second light emitting device 413b, and a third light emitting device 413c from the bottom as shown in FIG. 6 . The plurality of light emitting devices 413 of the present invention are arranged at the same spacing distance d but the present invention is not limited thereto and the first light emitting device 413a and the second light emitting device 413b The spacing between the second light emitting device 413b and the third light emitting device 413c may be different from each other.

At this time, the height of the light emitting main body 411 can be adjusted so that the first light emitting device 413a is positioned at the same height as the upper surface of the slab 20 where bending is not formed.

The height of the light emitting main body 411 may be adjusted so that the first light emitting device 413a is located at the same height as the top edge of the slab 20 on the side of the top of the slab 20, even if the slab 20 is provided with a bending shape. Here, the head portion refers to a front region of the slab 20 with respect to a conveyance direction of the slab 20. [

6, the light receiving section 420 may include a light receiving main body 421, a light receiving main body support 422, and a plurality of light receiving elements 423 disposed in the light receiving main body 421. FIG.

The light receiving main body 421 can be arranged to be movable up and down on the light receiving main body support 422. Accordingly, as shown in FIG. 8, the height of the light receiving body 421 can be adjusted corresponding to the thickness of the slab 20 conveyed through the conveyance unit 100. For example, in the case of the slab 20 to be conveyed through the conveyance unit 100, the slab S may be different for each product in which the slab S is used. By adjusting the height of the light receiving main body 421, It can be positioned at the set position.

The light receiving element 423 is disposed in the light receiving main body 421 and receives the laser beam irradiated toward the light receiving portion 420. The light receiving element 423 may be disposed corresponding to the light emitting element 413.

Each of the plurality of light-receiving elements 423 may be arranged in the vertical direction at a predetermined spacing distance d. 6, each of the plurality of light-receiving elements 423 may include a first light-receiving element 423a, a second light-receiving element 423b, and a third light-receiving element 413c from the bottom . Although the plurality of light receiving elements 423 of the present invention are arranged at the same spacing distance d, the present invention is not limited to this example. The first light receiving element 423a and the second light receiving element 423b It is needless to say that the spacing distance and the spacing between the second light receiving element 423b and the third light receiving element 413c may be different from each other.

At this time, the height of the light receiving body 421 can be adjusted so that the first light receiving element 423a is located at the same height as the upper surface of the slab 20 where bending is not formed.

The height of the light receiving body 421 may be adjusted so that the first light receiving element 423a is located at the same height as the top edge of the slab 20 on the side of the top surface of the slab 20 even when the slab 20 is provided with a bending shape.

The first light emitting element 413a is disposed at the same height as the first light receiving element 423a and the second light emitting element 413b is disposed at the same height as the second light receiving element 423b. The first light receiving element 413c may be disposed at the same height as the third light receiving element 413c.

Therefore, the bending height H of the slab 20 can be determined according to the detection of the laser beam received by each of the first light receiving element 423a, the second light receiving element 423b, and the third light receiving element 413c.

FIG. 9 is a view showing a slab detected by a sensing device disposed in a scarfing device according to an embodiment. FIG. 9 (a) is a view showing a slab in a steady state, and FIG. 9 FIG. 9C is a view showing a slab bending upward; FIG.

Referring to FIG. 9A, only the second light receiving element 423b and the third light receiving element 413c sense the laser. According to the signal of the sensing device 400, the control unit 800 can determine that the slab 20 to be conveyed is in a normal state (slab without bending).

Referring to FIG. 9 (b), only the third light receiving element 413c senses the laser. The control unit 800 can determine the bending height H of the slab 20 to be conveyed according to the signal of the sensing device 400. For example, as shown in FIG. 8 (b), the sensing device 400 may sense the bending height H of the downwardly bent slab 20.

Referring to FIG. 9C, all of the light receiving elements 413 can not detect the laser. The control unit 800 can determine the bending height H of the slab 20 to be conveyed according to the signal of the sensing device 400. For example, as shown in FIG. 9 (c), the sensing device 400 may sense the bending height H of the upwardly bending slab 20.

Although the sensing device 400 of the present invention includes three light emitting devices 413 and a light receiving device 423, the present invention is not limited thereto. For sensing the shape of a precise slab 20, It goes without saying that the element 413 and the light receiving element 423 may be provided.

The horizontal injection unit 500 can effectively remove the scale 11 welded to the slab 20 by injecting high pressure water. At this time, the high-pressure water injection height of the horizontal injection unit 500 may be controlled by the control unit 800 that receives the signal of the sensing device 400. [

10 to 12, the horizontal injection unit 500 includes a T-shaped elbow 510, a coupler 520, a circular plate 530, a flange portion 540, a connection pipe 550, and a nozzle 560 ).

A coupler 520 may be disposed between one side of the T-shaped elbow 510 and the servo motor 600. A supply pipe 700 for supplying water to the T-shaped elbow 510 may be disposed below the T-shaped elbow 510.

The coupler 520 can transmit the turning force of the servo motor 600 to the T-shaped elbow 510. [ Here, the coupler 520 may be formed in a cylindrical shape, and a thread may be formed on one outer peripheral surface.

That is, the coupler 520 is a member for connecting the T-elbow 510 and the servomotor 600, and can be screwed to the T-elbow 510 and the servomotor 600, respectively.

Accordingly, the coupler 520 can transmit the rotational force of the servomotor 600 to the T-elbow 510. Also, since the coupler 520 is detachably disposed between the T-shaped elbow 510 and the servo motor 600, maintenance or repair can be facilitated.

The circular plate 530 may be disposed within the coupler 530. When water is supplied to the T-shaped elbow 510, the circular plate 530 can prevent the supplied water from being transferred to the servo motor 600. [

The flange portion 540 can serve as a central axis when the nozzle 560 rotates.

Here, the flange portion 540 may include a first flange 541 and a second flange 542. The first flange 541 and the second flange 542 can be fixed to each other by a fixing member 543 such as a bolt or a nut. Accordingly, at the time of maintenance and repair, the fixing member 543 can be separated to separate the first flange 541 and the second flange 542.

One side of the first flange 541 can be screwed to one side of the T-elbow 510. One side of the first flange 541 may be connected to the connection pipe 550 by welding or the like.

The connection pipe 550 may be disposed between the flange portion 540 and the nozzle 560. 12, the connection pipe 550 may be arranged so that the center C2 of the nozzle 560 is disposed so as to be spaced apart from the center C1 of the flange portion 540 by using a lobed elbow.

The high-pressure water can be supplied to the nozzle 560 through the connection pipe 550.

The nozzle 560 can spray the high-pressure water to the slab 20. The nozzle 560 may be detachably disposed in the connection pipe 550. Accordingly, when the aging or maintenance of the nozzle 560 is required, the nozzle 560 can be easily replaced.

Here, the nozzle may be formed in a cylindrical shape, and a screw thread may be formed on one outer circumferential surface to be screwed to the connection pipe 550.

The nozzle 560 may be disposed apart from the center C1 of the flange portion 540. [ That is, the nozzle 560 may be spaced apart from the center C1 of the flange portion 540 by a predetermined distance R in the radial direction.

Therefore, when the servomotor 600 rotates the flange portion 540, the nozzle 560 rotates about the center C1 of the flange portion 540 as shown in Fig. Accordingly, as shown in FIG. 13, the spray height of the high-pressure water can be varied to effectively remove the scraping scale 11 that is welded to the slab 20.

Here, the nozzle 560 can rotate from 0 to 90 degrees with respect to the center C1 of the flange portion 540. [

The servomotor 600 can transmit the rotational force to the T-elbow 510 through the coupler 520. The nozzle 560 is rotated about the center C1 of the flange portion 540 in accordance with the rotation of the flange portion 540 interlocked with the rotation of the T-shaped elbow 510, and the spray height of the high- Can be varied. Here, the jetting height of the high-pressure water may be a height at which the center C2 of the nozzle 560 is positioned.

The servomotor 600 is controlled by the controller 800 so that the servo motor 600 rotates the T-elbow 510 to adjust the jetting height of the high-pressure water Can be varied.

FIG. 14 is a view showing a nozzle for spraying high-pressure water sprayed by a horizontal spray unit rotated by a servomotor of a scarifying apparatus according to the embodiment, wherein FIG. 14 (a) is a view showing a nozzle arranged corresponding to a steady slab , FIG. 14 (b) is a view showing a nozzle rotated by 30 degrees corresponding to a downwardly bent slab, and FIG. 14 (c) is a view showing a nozzle rotated 60 degrees corresponding to a slab bent upward .

9A and FIG. 14A, when the slab 20 in a steady state in which no bending is formed is sensed by the sensing device 400, the control unit 800 controls the servo motor 600 so that the nozzle 560 is positioned at 0 degree with respect to the center C1 of the flange portion 540. [ At this time, the nozzle 560 can spray the high-pressure water toward the upper surface 22 of the slab 20 to effectively remove the scraping scale 11 adhered to the slab 20. [

9B and 14B, when the downwardly bent slab 20 is sensed by the sensing device 400, the control unit 800 controls the servo motor 600 The nozzle 560 is positioned at 30 degrees with respect to the center C1 of the flange portion 540. [ At this time, the nozzle 560 can spray the high-pressure water toward the upper surface 22 of the bent slab 20 to effectively remove the scraping scale 11 adhered to the slab 20. [

9 (c) and FIG. 14 (c), when the upward bending slab 20 is detected by the sensing device 400, the control unit 800 controls the servo motor 600 The nozzle 560 is positioned at 45 degrees with respect to the center C1 of the flange portion 540. [ At this time, the nozzle 560 can spray the high-pressure water toward the upper surface 22 of the bent slab 20 to effectively remove the scraping scale 11 adhered to the slab 20. [

An angle 0, 30, 45, and 45 degrees indicating the position of the above-described nozzle 560 is a rotation angle that is arbitrarily set according to the signal of the sensing device 400. According to the setting, the nozzle 560 is positioned at the center of the flange portion 540 C1 can be rotated to any position within the range of 0 to 90 degrees. The rotation angle of the nozzle 560 is set in consideration of the jetting height of the high pressure water so as to correspond to the spacing height d of the light emitting element 413 and the light receiving element 423, respectively.

On the other hand, the servomotor 600 is detachably mounted on the coupler 520, which makes it easy to maintain or repair the servomotor 600.

The supply pipe 700 can supply high-pressure water to the T-shaped elbow 510 of the horizontal injection unit 500. Accordingly, the high-pressure water injected through the nozzle 560 of the horizontal injection unit 500 can effectively remove the scraping scale 11 welded to the slab 20.

On the other hand, a valve (not shown) may be disposed in the supply pipe 700. The valve may be controlled by the control unit 800. Accordingly, the control unit 800 can control whether or not the water supplied to the horizontal injection unit 500 is supplied through the supply pipe 700.

Here, the supply pipe 700 may be formed of a flappable material. For example, a flexible hose may be provided to the supply line 700. Accordingly, even if the T-type elbow 510 is rotated by the servo motor 600, damage to the supply pipe 700 can be prevented.

Referring to FIG. 15, the controller 800 controls the roller 110 of the conveyance unit 100 to move the slab 20 toward the scarping unit 300. The control unit 800 controls the roller 110 of the transfer unit 100 to transfer the scraped slab 20 to the next process.

In addition, the control unit 800 can control the pinch roll 120 of the transfer unit 100. Therefore, when the front end of the slab 20 is sensed by the sensing device 400, the control unit 800 controls the front pinch roll 121 to draw the slab 20 into the frame 200. [ At this time, the control unit 800 may move the scarping unit 300 based on the position of the slab 20 sensed by the sensing device 400, and may then drive the scarfing unit 300. The high-pressure water may be injected at the same time as the scarping operation is started

The control unit 800 controls the servo motor 600 based on the bending height H of the slab 20 sensed by the sensing device 400 so that the nozzle 560 is positioned at a predetermined position. Accordingly, the nozzle 560 can effectively remove the scraping scale 11 fused to the slab 20 by spraying the high-pressure water.

At this time, the control unit 800 controls the valve disposed in the supply pipe 700 to supply the high-pressure water to the nozzle 560.

In addition, the control unit 800 may control the rear pinch roll 122 to withdraw the slab 20 after the scarping process is completed.

The slab 20 pulled out to the rear pinch roll 122 can be conveyed to the next process by the roller 110 of the conveying unit 100. [

16, the control unit 800 may include a display unit 810, a plurality of lamps 820, and a plurality of buttons 830 that visually indicate a work process of the scarifying apparatus 1 .

Each of the lamps 820 can display the current turning position of the nozzle 560. That is, the illuminated lamp 820 indicates the jetting height of the high-pressure water jetted toward the slab 20 by the nozzle 560.

The button 830 may apply an electrical signal to the servo motor 600. That is, when any one of the plurality of buttons 830 is pressed, a pressing signal is applied to the servo motor 600, and the servo motor 600 can rotate the nozzle 560 to a predetermined position have.

Although the scarping device 1 effectively removes the scarf scale 11 welded to the slab 20 through the horizontal injection unit 500 having a variable injection height of the high pressure water, The present invention is not limited thereto, and a vertical spray unit (not shown) may further be provided to more effectively remove the scraping scale 11 welded to the slab 20. Here, the vertical spray unit may be a device for spraying high pressure water toward the upper surface of the slab 20.

The scarping device 1 controls the servo motor 600 based on the bending height H of the slab 20 sensed by the sensing device 400 to control the injection height of the high- The scalling scale 11 welded to the slab 20 can be effectively removed.

At this time, depending on the bending shape of the slab 20, the scarping device 1 can control the rotation speed of the servo motor 600 to more effectively remove the scarf scale 11 fused to the slab 20 have.

Hereinafter, a scarping device control method using the scarping device 1 will be described with reference to FIG.

In describing the scarping device control method S1 according to the embodiment of the present invention, the components of the scarping device 1 are denoted by the same reference numerals, and a detailed description thereof will be omitted.

The scarping device control method S1 senses the shape of the slab 20 and changes the spray height of the high-pressure water according to the shape of the slab 20 to thereby adjust the scarping scale 11 fused to the slab 20 The scarping device 1 is controlled so as to be effectively removed.

Referring to FIG. 17, the scarping device control method S1 includes a step S10 of transferring a slab to a scarping unit, a step S20 of sensing a bending height of the slab using a sensing device, (S30) of spraying high-pressure water toward the slab using a horizontal spraying unit (S40), and a step (S40) of spraying high-pressure water using the servo motor (S50). ≪ / RTI >

In the step S10 of transferring the slab to the scarifying unit, the scraping unit 300 is moved along the transfer line by using the plurality of rollers 110 and the pinch roll 120 of the transfer unit 100, .

At this time, the conveyance speed of the slab 20 conveyed to the scarping unit 300 can be adjusted by the rotation speed of the pinch roll 120. Accordingly, the control unit 800 can control the rotational speed of the pinch roll 120 to move the slab 20 toward the scarping unit 300 at a predetermined speed.

In the step S20 of sensing the bending height of the slab using the sensing device, the bending height H of the slab is sensed using a laser as described above.

In the step S30 of treating the surface of the slab transported by using the scarfing unit, high-pressure oxygen and combustion gas (LNG or the like) are injected into the slab 20 to melt the surface of the slab 20, Can be removed. At this time, the scarping unit 300 can be adjusted in position by the control unit 800 according to the shape of the slab 20 sensed by the sensing device 400.

In the step S40 of spraying the high-pressure water toward the slab using the horizontal injection unit, the high-pressure water supplied through the supply pipe 700 is sprayed onto the slab 20 using the nozzle 560. [ Accordingly, the high-pressure water can effectively remove the scraping scale 11 welded to the slab 20 by the scarping operation.

 In the step S50 of varying the injection position of the high-pressure water using the servo motor, as described above, the injection of the nozzle 560 spaced apart from the flange portion 560 based on the bending height H, And adjusts the height by using the rotational force of the servo motor (600). Accordingly, the jetting height can be varied corresponding to the shape of the slab 20.

At this time, the rotational speed of the servomotor 600 can be adjusted based on the moving speed of the slab 20. Accordingly, the rotational speed of the nozzle 560 can also be adjusted. That is, since the bending shape of the slab 20 is a curved shape when viewed from the side, the scraping scale 11 fused to the slab 20 is effectively removed by adjusting the rotation speed of the nozzle 560 .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

1: scarping device 20: slab
100: Feeder 110: Roller
120: pinch roll
200: frame
300: Scaping unit
400: sensing device 410:
420:
500: Horizontal injection unit 510: T-shaped elbow
520: coupler 530: circular plate
540: flange portion 550: connection piping
560: Nozzles
600: Servo motor
700: Supply piping
800:
S: How to control the scarping device

Claims (17)

A conveyance part for conveying the slab along the conveyance line;
A scarifying unit for processing the surface of the slab being conveyed;
A sensing device for sensing a bending height of the slab;
A horizontal spray unit for spraying high-pressure water toward the slab; And
A servo motor,
Wherein the servo motor rotates the horizontal spray unit to vary the injection position of the high-pressure water according to a signal of the sensing device. The method according to claim 1,
Further comprising a control unit for controlling the servomotor to vary the injection position of the high-pressure water based on information about the bending height of the slab detected by the sensing device. 3. The method of claim 2,
And the control unit controls the rotation speed of the servo motor. The method of claim 3,
Wherein the horizontal injection unit comprises:
T-type elbow;
A coupler disposed between one side of the T-elbow and the servo motor for transmitting a rotational force of the servo motor to the T-elbow;
A flange portion disposed on the other side of the T-shaped elbow;
A cylindrical nozzle for spraying the high-pressure water; And
And a connecting pipe disposed between the nozzle and the flange portion,
Wherein a center (C2) of the nozzle is spaced apart in the radial direction from a center (C1) of the flange portion. 5. The method of claim 4,
And a circular plate disposed within the coupler. 5. The method of claim 4,
Wherein the nozzle is rotated from 0 to 90 degrees with respect to the center (C1) of the flange by the servomotor. The method according to claim 6,
Wherein the sensing device is spaced apart from the horizontal injection unit by a predetermined distance L in a direction opposite to the conveying direction of the slab. 8. The method of claim 7,
Wherein the sensing device includes a light emitting portion for emitting a laser beam and a light receiving portion for receiving a laser beam emitted from the light emitting portion. 9. The method of claim 8,
The light-
A light emitting body support;
A light emitting body arranged to be movable up and down on the light emitting body support base; And
And a plurality of light emitting elements arranged vertically and spaced apart from each other in the light emitting body. 10. The method of claim 9,
The light-
Receiving body support;
A light receiving body arranged to be movable up and down on the light receiving body support; And
And a plurality of light receiving elements arranged vertically spaced apart from each other in the light receiving body,
Wherein the light receiving element receives a laser beam emitted from the light emitting element and detects a bending height (H) of the slab. The method according to claim 6,
And the nozzle is detachably disposed on the connection pipe. 5. The method of claim 4,
And a supply pipe arranged at one side of the T-elbow for supplying the high-pressure water to the T-elbow. 13. The method of claim 12,
Wherein the supply piping is formed of a fl ipable material. 3. The method of claim 2,
Wherein the control unit moves the scarping unit according to a signal of the sensing unit, and then drives the scarping unit. A method for controlling a scarping device using a scarping device,
Transferring the slab to the scarifying unit;
Sensing a bending height of the slab using a sensing device;
Treating the surface of the slab being conveyed using a scarifying unit;
Spraying high-pressure water toward the slab using a horizontal injection unit; And
And varying an injection position of the high-pressure water using a servo motor,
Wherein the servomotor rotates the horizontal injection unit to vary the injection position of the high-pressure water according to a signal of the sensing device. 16. The method of claim 15,
Wherein the step of transferring the slab to the scarfing unit adjusts the rotational speed of the pinch roll of the scarfing unit so that the slab is moved toward the scarfing unit at a predetermined speed. 17. The method of claim 16,
Wherein the rotating speed of the servomotor is controlled based on the moving speed of the slab.

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