KR20140081530A

KR20140081530A - Device for scarfing slab

Info

Publication number: KR20140081530A
Application number: KR1020120151400A
Authority: KR
Inventors: 김기환; 박영선; 김성연
Original assignee: 주식회사 포스코
Priority date: 2012-12-21
Filing date: 2012-12-21
Publication date: 2014-07-01

Abstract

A torch unit positioned at an edge of the casting and scarifying the corner so as to control the scarping position in response to irregular movement of the casting along the roller table; And a control section for controlling the amount of movement of the torso unit in the width direction for moving the torch unit along the width direction of the casting, and the amount of movement of the moving part in the up and down direction and the width direction.

Description

&Lt; RTI ID = 0.0 > {DEVICE FOR SCARFING SLAB}

The present invention relates to an apparatus for scaping a casting edge produced through a performance process. More particularly, the present invention relates to a scantling scarf apparatus capable of stable position control in accordance with the movement of a cast steel.

Generally, a slab produced in a continuous casting machine is cut to a size of 40 tons or less, heated in a reheating furnace, and then introduced into a hot rolling mill to produce a hot-rolled coil.

The casts produced in the continuous casting process often have corner cracks in the corner area, especially in steel types such as medium carbon steel having a roundness reaction.

Rolling a cast slab with corner cracks into a rolling mill causes an operation error such as a plate break or an edge scab defect in the produced hot rolled coil. Accordingly, in order to remove such defects, the cast steel of the steel type which easily generates a corner crack scarfing the corner area of the cast steel in the hot state before the casted steel produced in the continuous casting machine is cooled to remove the defect . The hot-rolled steel sheet having excellent quality can be produced by subjecting the cast steel to scarfing and hot rolling.

Conventionally, the scarfing process is performed through a scarfing machine installed on the exit side of the continuous casting machine. The scarfing machine is placed on both sides of the casting and scapes the casting side to a depth of 3-4 mm.

However, the conventional apparatus has a problem in that it can not properly cope with the movement of the casting machine along the roller table of the continuous casting machine.

That is, the cast steel moves irregularly in the width direction and the vertical direction of the cast steel in the process of being conveyed along the roller table. However, conventionally, since it is difficult to control the position of the scarfing machine, precise scarping can not be performed on irregularly flowing slabs. In addition, in the past, irregular behavior of the cast steel was separately controlled for precise scarping operation. However, in such a structure, a complex structure for detecting movement of the cast steel and controlling the casting behavior is required.

As described above, in the case of the conventional structure, the structure of the equipment becomes complicated, and the scarping operation for the slab is not properly performed, so that defects can not be completely removed.

Provided is a scanting scarping device capable of controlling a scarping position in response to irregular movement of a casting along a roller table.

The scarfing apparatus includes a torch unit positioned at an edge of a casting and scaping an edge, a vertical moving unit for moving the torch unit in the vertical direction of the casting, a width direction for moving the torch unit along the width direction of the casting And a control unit for controlling a moving amount of the moving unit, the up / down moving unit, and the widthwise moving unit.

The upper and lower parts may include a vertical cylinder installed on a moving plate disposed on an upper portion of the casting, and a vertical member connected to the piston rod of the vertical cylinder and extending downwardly and having the torch unit installed at a tip thereof.

Wherein the width direction moving part includes a moving frame in which the moving plate is movably installed along a slide plate provided at an upper end in a width direction of the cast steel, And a drive cylinder for moving the plate.

The width direction moving part may further include a rail provided in the strip width direction, a driving wheel installed on the moving frame, and a servo motor installed on the moving frame to drive the driving wheel.

The torch unit may include an upper torch scarring the upper edge of the casting and a lower torch scarring the lower edge of the casting.

The upper torch may further include a side torch scouring the side of the casting.

The upper and lower torches having two vertical members each coupled to an upper torch and a lower torch, wherein the moving plate is provided with two vertical cylinders, each connected to two vertical members, It may be a structure for individually moving the torch.

The control unit may include a regulator installed on each of the pneumatic lines of the driving cylinder and the vertical cylinder to keep the driving pressure of the driving cylinder constant.

According to the present embodiment as described above, the position of the apparatus is controlled in accordance with the movement of the casting machine, so that the scarping operation can always be performed at the correct position regardless of the movement of the casting machine. Accordingly, it is possible to improve the quality of the hot-rolled steel sheet through a more perfect scaping operation for the cast steel.

Further, it is not necessary to separately control the behavior of the cast steel, and the construction of the equipment can be further simplified.

1 is a perspective view showing a configuration of a scant scarf apparatus according to the present embodiment.
Fig. 2 is a schematic view showing a circuit configuration of a scant scarf apparatus according to the present embodiment.
3 is a perspective view showing the state of use of the scarifier scarfing apparatus according to the present embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. 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 invention. Wherever possible, the same or similar parts are denoted using the same reference numerals in the drawings.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.

All terms including technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

Fig. 1 and Fig. 2 show the construction of a screed scarfing apparatus according to the present embodiment, and Fig. 3 shows a state of use of the screed scarfing apparatus according to the present embodiment.

The cast P produced through the continuous casting machine is continuously conveyed along the conveying roller table. The scarfing apparatus 10 of this embodiment is disposed on both sides in the width direction of the strip P from the outgoing side of the continuous casting machine so as to scarf both sides and corners of the strip P proceeding along the roller table do. Through the scarping step, defects such as cracks at the side edges are removed from the cast P.

The scarfing apparatus 10 of this embodiment includes a torch unit 20 for heating the edges and sides of the cast P.

The torch unit 20 includes a nozzle for discharging oxygen and the like, and is configured to surround the edge of the side of the cast piece P.

The torch unit 20 may include an upper torch 22 scarring the upper edge of the cast P and a lower torch 26 scarring the lower edge of the cast P . Further, the upper torch 22 may further include a side torch 24 scarring the side of the cast P. The torch unit 20 scatters a moving piece P moving in a state of being in close contact with a side surface and a corner of the cast piece P. [

Here, the cast steel P is irregularly moved in the width direction and the vertical direction of the cast steel P in the process of moving along the roller table of the continuous casting machine.

The scarf 10 has a structure in which the torch unit 20 moves in conjunction with the irregular movement of the cast piece P.

To this end, the scarfing apparatus 10 of the present embodiment includes a vertically moving part for moving the torch unit 20 in the vertical direction of the cast piece P, a vertical moving part for moving the torch unit 20 along the width direction of the piece P, And a control unit for controlling a moving direction of the width direction moving unit, the moving up and down moving unit and the width direction moving unit.

Accordingly, the torch unit 20 moves in accordance with the width direction movement of the cast strip P by the moving portion in the width direction, and moves together with the vertical movement of the cast strip P by the upper and lower moving portions.

In the following description, the width direction refers to the y-axis direction in Fig. 3, and the up-down direction or vertical direction refers to the z-axis direction in Fig. The x-axis direction in Fig. 3 is the direction in which the cast piece P moves.

The upper and lower eccentric portions are connected to the piston rods of the vertical cylinders 32 and 33 provided on the moving plate 30 located on the upper part of the casting P, And vertical members (34, 35) on which a plurality of vertical members (20) are installed. The vertical cylinders 32 and 33 may be pneumatic cylinders driven by pneumatic pressure.

When the vertical cylinders 32 and 33 are expanded and contracted, the vertical members 34 and 35 move up and down, and the torch unit 20 installed at the tip ends of the vertical members 34 and 35 moves along the z axis direction . Therefore, the torch unit 20 can be moved up and down together with the vertical movement of the cast piece P.

The torch unit 20 is divided into an upper torch 22 for scarring the top edge and the side surface of the cast piece P and a lower torch 26 scarfing the bottom edge of the cast piece P, The upper and lower portions of the upper and lower shafts are also configured to move the upper and lower torches 22 and 26 separately.

The upper and lower portions include two vertical members 34 and 35 and the vertical members 34 and 35 are coupled to the upper torch 22 and the lower torch 26, respectively. Further, two vertical cylinders provided on the moving plate 30 are also provided and connected to the vertical members 34 and 35, respectively. The two vertical cylinders 32 and 33 are individually driven so that the upper torch 22 and the lower torch 26 connected to each other through the vertical members 34 and 35 can be individually moved.

By moving the upper torch 22 and the lower torch 26 separately as described above, the upper torch 22 and the lower torch 26 are moved more precisely in accordance with the movement of the cast piece P, .

A moving frame 40 in which the moving plate 30 is movably installed along a slide plate 42 provided at an upper end in the width direction of the cast strip P, And a driving cylinder (44) installed on the side surface of the cast strip (P) in the width direction and connected to the moving plate (30) to move the moving plate (30). The drive cylinder 44 may be a pneumatic cylinder operated by air pressure.

The slide plate 42 is a member on which the moving plate 30 is placed and slides, and is extended to the upper end of the moving frame 40. A roller or the like may be further provided at the lower end of the moving plate 30 to reduce friction with the slide plate 42.

When the driving cylinder 44 is expanded and contracted, the moving plate 30 connected to the piston rod end of the driving cylinder 44 moves in the width direction of the bill P with respect to the moving frame 40. The moving plate 30 is provided with a torch unit 20 via vertical members 34 and 35 so that the torch unit 20 moves along the y axis direction as the moving plate 30 moves. Therefore, the torch unit 20 can be moved to the left and right in accordance with the widthwise movement of the cast piece P.

Further, in the present embodiment, the width direction moving portion has a structure for moving the movable frame 40 itself in the width direction of the piece P. For this, the width direction moving part includes a rail 46 provided in the width direction of the cast strip P, a driving wheel 49 mounted on the rail 46 and placed on the moving frame 40, 40 for driving the driving wheel 49. The driving wheel 49 is driven by a driving motor (not shown).

When the servo motor 48 is driven, the driving wheel 49 rotates and the moving frame 40 itself moves along the rail 46. The scalloping apparatus 10 moves from the both sides of the strip P in the transverse direction to the strip P so that the torch unit 20 is positioned at the edge of the strip P .

The control unit controls the driving pressure of the driving cylinders 44 and the vertical cylinders 32 and 33 to be constant and moves the torch unit 20 in accordance with the movement of the piece P. [ The control unit includes a regulator 50 installed on each of the pneumatic lines of the driving cylinder 44 and the vertical cylinders 32 and 33 to keep the driving pressure of the driving cylinder 44 constant.

As shown in FIG. 2, the driving cylinder 44 and the two vertical cylinders are each provided with a regulator 50 on a pneumatic line. The regulator (50) keeps the pneumatic pressure applied to each cylinder constant. The pressure is applied to the driving cylinder 44 through the vertical members 34 and 35 and the moving plate 30 when pressure is applied to the torch unit 20 according to the movement of the cast piece P, So that the pressure of the driving cylinder 44 is varied. The regulator (50) regulates the driving pressure of the driving cylinder (44) in accordance with the set pressure when pressure fluctuation occurs. The driving cylinder 44 is driven in accordance with the movement of the cast P so that the torch unit 20 can be moved in accordance with the movement of the cast P so as to be brought into close contact with the cast P at a constant pressure.

Hereinafter, the operation of the apparatus will be described.

When the screed P is moved along the conveying roller table continuously, the scarping device 10 is moved to both sides of the screed P in the width direction to scarify the edge and the side of the screed P.

When the servomotor 48 of the apparatus is driven, the moving frame 40 is moved toward the edge of the bill P along the rail 46 while the driving wheel 49 rotates. When the torch unit 20 is moved to both ends of the cast piece P, the driving cylinder 44 and the two vertical cylinders 32 and 33 are driven to bring the torch unit 20 into close contact with the cast piece P. The upper torch 22 is in contact with the upper edge and the side surface of the cast piece P and the lower torch 26 is in contact with the lower edge of the cast piece P.

The driving cylinder 44 and the vertical cylinders 32 and 33 bring the torch unit 20 into close contact with the bill P with the driving pressure set by driving the regulator 50.

In this state, when the strip P moves irregularly while moving, a pressure is applied to the torch unit 20 which is in close contact with the steel strip P, and the regulator 50 is operated in accordance with the pressure fluctuation, The vertical cylinders 32 and 33 are expanded and contracted. The moving plate 30 moves in the y-axis direction with respect to the moving frame 40 in accordance with the expansion and contraction operation of the driving cylinder 44. [ Thus, the torch unit 20 mounted on the vertical members 34 and 35 is moved in the y-axis direction to correspond to the movement of the piece P in the y-axis direction.

Therefore, even if the cast steel P moves irregularly in the y-axis direction, the torch unit 20 is moved in the y-axis direction and remains in a state in which it is kept in close contact with the side surface of the cast steel P with the same pressure.

Likewise, the vertical members 34 and 35 move in the z-axis direction as the vertical cylinders 32 and 33 expand and contract, and the torch unit 20 installed in the vertical members 34 and 35 moves in the z-axis direction And corresponds to the movement of the cast steel P in the z-axis direction. Therefore, even if the cast steel P moves irregularly in the z-axis direction, the torch unit 20 is moved in the z-axis direction and remains in a state in which it is kept in close contact with the side surface of the cast steel P with the same pressure.

As described above, the scooping is performed by continuously touching the torch unit 20 at a constant pressure in accordance with the movement of the cast piece P, so that the scooping is performed at a constant position regardless of the movement of the cast piece P, .

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

10: Scarping device 20: Torch unit
22: upper torch 26: lower torch
30: moving plate 32, 33: vertical cylinder
34, 35: vertical member 40: movable frame
42: slide plate 44: drive cylinder
46: Rail 48: Servo motor
50: Regulator

Claims

A vertical moving part for moving the torch unit in the vertical direction of the main shaft; a transverse moving part for moving the torch unit along the width direction of the main shaft; And a control section for controlling the amount of movement of the moving section in the east and the width direction.

The method according to claim 1,
Wherein the upper and lower eccentric portions include a vertical cylinder mounted on a moving plate disposed on an upper portion of the casting, and a vertical member connected to the piston rod of the vertical cylinder and extending downwardly and having the torch unit installed at a tip thereof.

3. The method of claim 2,
Wherein the width direction moving part includes a moving frame in which the moving plate is movably installed along a slide plate provided at an upper end in a width direction of the cast steel, And a drive cylinder for moving the plate.

The method of claim 3,
Wherein the control unit includes a regulator installed on each of the pneumatic lines of the driving cylinder and the vertical cylinder to maintain a constant driving pressure of the driving cylinder.

The method according to claim 3 or 4,
Wherein the width direction moving part further includes a rail provided in a strip width direction, a driving wheel provided on the moving frame, and a servo motor mounted on the moving frame to drive the driving wheel.

6. The method of claim 5,
The torch unit comprising an upper torch scarring the upper edge of the casting and a lower torch scarring the lower edge of the casting.

The method according to claim 6,
The upper and lower torches having two vertical members each coupled to an upper torch and a lower torch, wherein the moving plate is provided with two vertical cylinders, each connected to two vertical members, A scarf scaping device having a structure for individually moving the torch.