KR20030006147A - Automatic scarfing machine for cut face of slab - Google Patents

Abstract

PURPOSE: An automatic scarfing machine for cut face of slab is provided to remove scarf and burr automatically and promptly by injecting oxygen of high pressure thereto after preheating cross section of a slab to a high temperature using gas and oxygen through a torch. CONSTITUTION: The automatic scarfing machine for cut face of slab comprises an upper part for driving a torch(1) for heating and removing scarf(73) rotationally and vertically, and a lower part for driving the torch(1) vertically and horizontally as supporting the upper part, wherein the upper part comprises a torch rotation part comprising a motor, a shaft lock cylinder(4) and a torch rotation sensing sensor(5); a vertical driver part comprising a vertical driving wheel and a vertical driving pinion gear; and a horizontal driver part comprising a horizontal driving wheel, a horizontal driving pinion gear, a vertical driving rail and a vertical driving rack gear(23), and the lower part comprises a guide track frame(32) comprising a track guide segment block, a horizontal driving rail(30) and a horizontal driving rack gear(31); a guide track guiding shaft(33) both ends of which are supported by a guide track fixing beam(39); and a hydraulic cylinder(36) for vertically driving a guide track frame(32).

Description

Slab Shear Surface Automatic Scarping Machine {AUTOMATIC SCARFING MACHINE FOR CUT FACE OF SLAB}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab shear surface automatic scarfing machine. The present invention relates to a device for removing the melting snow which inevitably occurs in the cross section of the slab head and a burr attached to the lower part of the cutting line when cutting the slab in a torch cutting machine. It is about an automatic scarfing machine that allows the user to easily and quickly remove the hard work by using the jig manually.

In general, slabs produced in the refining plant are intermediate products among the products produced in steel mills. The slabs are made of thin coils after reheating in a hot rolling mill to make coils and rolling them.

However, slabs with flaws on the surface adversely affect the coiled product during rolling, so the scarping machine should be rolled after removing the flaw on the slab surface completely.

As such, in the scarfing machine, the slab head is heated to a high temperature using a flame mixed with gas and oxygen through a unit located in the scarfing machine, and then sprayed with high pressure oxygen in order to remove the flaw on the surface of the slab. The surface of the slab is melted and oxidized to remove the flaw.

When performing such a scarfing, the slab head is heated to a high temperature and a large amount of molten water flows to the slab head end and solidifies as soon as high pressure oxygen is injected. However, this melting process is essential and must be removed because it will damage the roll during the rolling operation in the hot rolling mill and thus adversely affect the coil surface.

On the other hand, when cutting the slab in the torch cutting machine, molten oxidized water is fixed in the longitudinal direction along the lower slab cut line, which is called a burr, which also adversely affects the quality of the product. It must be removed.

In the removal operation of the molten snow 73, in the prior art, the operator performed the operation by manually removing the power tool using air pressure, and the following problems occurred.

That is, when the operator removes the snow melting 73 of the slab 72 with the air-operated tool as described above, the blade attached to the lower portion of the power tool directly strikes the snow melting attached to the slab and cuts it. Since taking a method of removing, the impact of the impact is transmitted directly to the worker to transmit a lot of repulsive force to the wrist joint of the worker, which caused a great risk of damage to the worker's wrist joint and causing occupational diseases.

In addition, during the removal operation of the snow melting 73, the powder of the snow melting was scattered in all directions, and there was a danger of being lodged on the worker's face and other body parts.

In addition, since the width of the slab 72 is small from 900mm to 1800mm, it takes a lot of time to remove by hand, the slab that is finished scarfing than the time to scarf the slab 72 in the scarfing machine Since it takes more time to remove the molten snow 73 attached to the end face of 72, there arises a problem that the operation rate of the scarfing machine is extremely reduced.

In addition, the power tool for removing the snow-melting snow 73 is usually an expensive product, because the use life is very short, about 1 month, there is a problem that the cost required for the work is excessive.

The present invention has been made to solve the above problems, through the torch is automatically rotated at an appropriate angle while adjusting the height and vertical and horizontal position, preheating the cross section of the slab to high temperature using gas and oxygen The purpose of the present invention is to provide a slab shear surface automatic scarfing machine that can quickly and quickly remove burrs generated on the slab head section during scarfing and burrs generated on the slab during torch cutting. have.

1 is a perspective view showing a torch rotating part of the present invention,

2 is a perspective view showing a vertical drive device of the present invention,

3 is a perspective view showing a horizontal drive device of the present invention,

Figure 4 is a perspective view of the upper end of the present invention, the automatic scarfing machine,

5 is a perspective view showing a lower portion of the present invention automatic scarfing machine,

6 is an exploded perspective view of a torch rotating part of the present invention;

7A and 7B are perspective views showing the torch of the present invention, FIG. 7A is a front view, and FIG. 7B is a rear view,

8 is a perspective view showing the overall configuration and operating state of the present invention automatic scarfing machine,

9 is a configuration diagram showing a gas and an oxygen line of the present invention.

<Description of Symbols for Main Parts of Drawings>

1: torch 3: torch connecting shaft

4: axial lock cylinder 5: torch rotation sensor

10: torch rotary motor 11: vertical drive frame

13: vertical drive DC motor 14: vertical drive reducer

15: vertical drive pinion gear 20: horizontal drive frame

22: vertical drive rail 23: vertical drive rack gear

24: horizontal drive DC motor 25: horizontal drive reducer

26: horizontal drive pinion gear 30: horizontal drive travel rail

31: horizontally driven rack gear 32: guide track frame

33: guide track guide shaft 36: hydraulic cylinder

38: guide track guide segment block 43: torch connecting wheel

53: torch ignition burner

The present invention for achieving the above object, the upper end for driving the torch 1 for heating and removing the molten iron 73 in the rotational direction and the vertical direction, and driving in the vertical direction and the horizontal direction while supporting the upper end portion. It consists of the lower part that makes

The upper end portion includes a motor 10 for rotating the torch rotary gear 2 provided on the connecting shaft 3 of the torch 1 with the rotary gear 8 provided at the shaft end, and the torch connecting shaft 3. A torch rotating unit including an axial lock cylinder (4) for fixing at a rotational position of the torch and a torch rotation detecting sensor (5) for detecting rotation of the torch (1); It has a quadrangular plate shape for holding and supporting the torch rotating part to its upper surface, the vertical driving wheel 12 and the vertical driving wheel 12 respectively installed on both sides of the torch connecting shaft 3 and the vertical direction, perpendicular to one side of the side portion A vertical drive device having a vertical drive pinion gear 15 which is rotationally driven by a drive DC motor 13; It has a quadrangular plate shape for supporting the vertical drive unit, the horizontal drive wheel 21 is provided on each side portion in the direction parallel to the torch connecting shaft (3), and the horizontal drive is installed on one side of the side portion A horizontal drive pinion gear 26 rotated by a DC motor 24, a vertical drive rail 22 for guiding the vertical drive wheel 12 to move in a vertical direction, and the vertical drive pinion gear ( And a horizontal drive device having a vertical drive rack gear 23 engaged with the 15 to drive the vertical drive device in a vertical direction.

The lower end portion has a quadrangular shape, and is installed at a lower portion of each corner portion and has a track guide segment block 38 having a shape in which a height gradually decreases along one side direction parallel to the torch connecting shaft 3, and an upper portion thereof. The horizontal drive rail (30) for supporting the horizontal drive wheel 21 to move in the horizontal direction, and the horizontal drive rack to engage the horizontal drive pinion gear (26) to drive the horizontal drive unit in the horizontal direction A guide track frame 32 having a fish 31; Guide track guide shafts 33 whose both ends are supported by guide track fixing beams 39, while slidingly supporting the bottom surface of the track guide segment block 38; It characterized in that it comprises a hydraulic cylinder 36 for driving the guide track frame 32 in a vertical direction by driving the guide track frame 32 in a direction parallel to the torch connecting shaft (3) do.

Hereinafter, with reference to the drawings will be described a preferred embodiment of the present invention.

1 is a perspective view showing a torch rotating part of the present invention, FIG. 2 is a perspective view showing a vertical drive device part of the present invention, FIG. 3 is a perspective view showing a horizontal drive device part of the present invention, and FIG. 4 is an upper part of an automatic scarfing machine of the present invention. 5 is a perspective view showing a lower end of the present invention automatic scarfing machine, Figure 6 is an exploded perspective view of the torch rotation of the present invention, Figures 7a and 7b is a perspective view showing the torch of the present invention, Figure 7a is a front, Fig. 7B is a rear view, Fig. 8 is a perspective view showing the overall configuration and operating state of the present invention automatic scarfing machine, Fig. 9 is a block diagram showing the gas and oxygen lines of the present invention.

The present invention comprises an upper end portion for driving the torch 1 for heating and removing the molten snow 73 in a rotational direction and a vertical direction, and a lower end portion for driving the upper end portion in a vertical direction and a horizontal direction.

As shown in FIG. 1, a torch rotary gear 2, which is a component that rotates the torch, is fixed to the torch connecting shaft 3, and an axial lock for fixing the torch to move behind the torch connecting shaft 3. The torch rotation sensor 5 which detects the rotation of the cylinder 4 and the torch 1 is combined. The combined parts are assembled by bolts and nuts on top of the vertical drive frame 11 by the shaft fixing arm 7 and the lock cylinder fixing arm 6.

The torch rotating motor 10 for rotating the torch 1 is seated in the vertical drive frame 11 in a state in which the reducer 9 and the torch rotary gear 8 are combined to enable the torch 1 to rotate.

In addition, the right side of the vertical drive frame 11 is a power source for driving the torch in the vertical direction, the vertical drive DC motor 13 is coupled by a bolt and a nut in a state in which the reducer 14 and the pinion gear 15 are combined, The four vertical drive wheels 12 are coupled to and seated on the vertical drive rails 22 installed on the top of the horizontal drive frame 20.

As shown in FIG. 3, the horizontal drive frame 20 supports the vertical drive frame on which the torch is seated, and the two vertical drive rails 22 and the vertical drive rail allow the vertical drive frame to be driven in the vertical direction. The size gear 23 is installed so that the four vertical driving wheels 12 attached to the lower portion of the vertical driving frame are guided so that the vertical driving pinion gear 15 coupled to the vertical driving frame is the vertical driving rack gear 23. Meshes with.

In addition, four horizontal drive wheels 21 are combined at the lower portion of the horizontal drive frame 20 to drive the torch 1 in a horizontal direction, and a horizontal drive DC motor 24 is a reduction gear ( 25) and the pinion gear (26) in combination with the bolt and nut.

The combined parts constitute the upper end of the present invention, and serve to drive the torch 1 in the rotational direction and the vertical direction, and at the same time, a horizontal driving rail installed on the top of the guide track frame 32 shown in FIG. It is seated at 30).

The lower end of the present invention shown in Figure 5 is a portion supporting the upper end configured as described above the configuration is as follows.

The guide track frame 32 is welded with a steel structure, and two horizontal driving rails 30 are installed at the upper end, and four horizontal driving wheels 21 are installed at the upper end, and the horizontal driving rack gear is provided at the front. 31 is combined to engage with the horizontal drive pinion gear 26 coupled to the front of the horizontal drive frame located at the upper end, so that the upper end can be driven in the horizontal direction.

In addition, four track guide segment blocks 38 are coupled to the lower end of the guide track frame 32 and are mounted on the guide track guide shaft 33.

Two guide track guide shafts 33 are combined by four guide track fixed beams 39 to support the guide track frame 32.

In addition, a hydraulic cylinder 36 is installed on the left side of the guide track frame 32 so that the track guide segment block 38 combined with the lower end of the guide track frame 32 by hydraulic cylinder operation is provided with a guide track guide shaft 33 surface. Accordingly, the guide track frame 32 is made to rise and fall. As such, when the guide track frame 32 is raised and lowered, the upper end portion is raised and lowered like the guide track frame so that the torch 1 is raised and lowered together.

Next, the torch 1 of the present invention will be described in detail.

Among the torch craters, there are high-pressure oxygen square holes 54 through which high-pressure oxygen is emitted, and preheating gas holes 56 and pre-heating oxygen holes 55 through which preheating gas is discharged from each side of the square hole.

In addition, a torch ignition burner 53 is installed at the upper portion of the high pressure oxygen hole 54 to provide a spark when the torch 1 is ignited.

In addition, the preheating gas and the preheating oxygen side of the flame torch are processed to a certain slope, so that the flames from both sides of the torch are gathered in one place.

The back of the torch is a part to which the torch head 63 is coupled, including a high pressure oxygen inlet, and a preheating gas, a preheating oxygen, and a gas inlet for ignition of the torch are drilled, and the head fixing bolt hole 4 can be combined with the torch head 63. The dog is perforated.

The torch head 63 is a place where oxygen and gas are directly supplied through the flexible hose, and the gas and oxygen inflow perforated to the torch head 63 are connected to the flexible hose connecting pipe screw 69 that enables the torch head and the flexible hose to be connected. To the hole.

The torch head coupled as described above is coupled to the torch by the torch head fixing bolt 70, and connects the flexible hose 71 to the flexible hose connection pipe screw, and is installed on the upper portion of the vertical drive frame 11 belonging to the upper end. Is connected to the pipe.

Next, the connection method of the torch 1 which heats the molten iron 73 and the burr 74 to high temperature is demonstrated with reference to FIG.

Torch 1 of the present invention should be heated at an angle of 25 degrees on the torch structure in order to heat the molten iron 73 attached to the slab 72 shear surface and the burr 74 attached to the slab cutting line to a high temperature. . In order to maintain the torch at an angle of about 25 degrees, the torch coupling surface 43 is machined into a bolt hole drilled in the torch connecting wheel by using two torch connecting bolts 41 to the torch connecting wheel 43 machined at 25 degrees. It is coupled to the torch fixing bolt hole (57).

After the torch 1 and the torch connecting wheel 43 are coupled as described above, the torch connecting shaft 3 to which the torch fixing arm 7 and the shaft lock cylinder 4 and the torch rotation sensor 5 are coupled Torch connecting wheel 43

The following is a look at each sensor configuration of the present invention.

Torch rotation detection sensor 5 for detecting the rotation of the torch 1 is a cam type switch, coupled to the end of the torch connecting shaft 3 with a small bolt to detect the rotation of the torch, vertical drive frame 11 When the torch 1 seated on the vertical drive, the forward stop limit switch 27a is installed above the horizontal drive frame 20, and the reverse stop limit switch 27b is installed below the horizontal drive frame 20, When the torch 1 is moved forward and backward, the vertical drive frame 11 is limited so as not to be out of the range of the two limit switches 27a and 27b.

In addition, a horizontal drive reverse stop limit switch 34a and a horizontal drive forward stop limit switch 34b which limit the position when the torch is driven horizontally are installed at the upper left and right sides of the guide track frame 32, and the upper end is driven horizontally. It will limit the forward and backward positions.

In order to detect the rising and falling positions of the guide track frame 32, the guide track rising stop limit switch 40a and the guide track falling stop limit switch 40b are installed at one of the guide track fixing beams 39.

In addition, various sensors installed outside the present invention are installed for the automatic work of the present invention, will be described with reference to the contents shown in FIG.

The first photosensor 75a is a sensor for sensing the slab to be transported at a low speed when the slab is transported through the roller, and the second photosensor 75b is a sensor for accurately stopping the slab to be transported at a low speed.

When the slab head is detected, the third photosensor 75c is a sensor for detecting that the slab is not transferred to the working position of the present invention in any case.

Next, a gas and oxygen supply method supplied to the torch 1 of the present invention will be described with reference to FIG.

Gas and oxygen lines are opened and closed by shut-off valves (851, 852, shut-off valve) by the solenoid valve (797, 799) of the present invention, the pressure control of gas and oxygen is controlled valve (801, 802, 803, 804, 805.

In addition, the gas and oxygen pressures adjusted by the control valves 801, 802, 803, 804, and 805 are opened and closed by the solenoid valves 771, 792, 793, 794, and 795, and if necessary, the torch (1) ) Will be supplied.

For safety, check valves 811, 812, 813, 814, 815, 816, 817, and 818 are installed to shut off gas and oxygen, and remain in the pipe through the vent hole by operation of the vent valve 841.842. One gas and oxygen is taken out.

Referring to the operation of each component of the present invention configured as described above are as follows.

The torch 1 is provided to mainly remove the molten iron 73 attached to the slab 72 head, but is also configured to remove the burr 74 attached to the slab cutting line.

The operating state of the torch 1 will be described with reference to the contents shown in FIG. 4.

Since the torch 1 is basically to remove the slab melting snow 73, the torch direction is directed toward the cross section of the slab head, but when removing the burr 74 attached to the slab cutting line, the torch crater direction is removed. The torch must be rotated because it must fit into the burr attached to the slab cutting line.

Rotation of the torch is torch rotation motor 10 is rotated to decelerate in the reducer (9) and then torch connecting shaft (3) by the torch rotary gear (8) (2).

This torch rotation is operated by a torch rotation select switch and a torch rotation manual switch installed on the operation panel, and is adjusted at an exact angle by the torch rotation detection sensor 5 connected to the end portion of the torch connecting shaft 3.

In addition, when a gas flame occurs in the torch, the shaft lock cylinder 4 is automatically operated by air pressure to hold the torch connecting shaft 3 so that the torch does not move.

Next, the vertical driving of the torch will be described.

The torch and the torch rotating device mounted on the vertical drive frame 11 are mounted on the vertical drive rail 22 installed on the horizontal drive frame 20, and the vertical drive DC motor 13 is combined to the right of the vertical drive frame 11. The torch is driven in the vertical direction by the vertical drive pinion gear 15 which rotates in engagement with the horizontal drive rack gear 23 by the driving of.

Such driving is performed by a vertical drive forward switch, a stop switch, a vertical drive reverse switch installed in the operation panel, and the speed is adjusted by a speed adjusting switch.

Next, the horizontal driving of the torch will be described.

In the horizontal driving of the torch 1, the horizontal driving rail 30 provided at the upper end of the guide track frame 30 in the direction of substantially removing the melting snow 73 attached to the front end surface of the slab 72. To move along the horizontal direction.

When the horizontal drive DC motor 24 attached to the front of the horizontal drive frame is driven, the horizontal drive pinion gear 26 is engaged with the horizontal drive rack gear attached to the front of the guide track frame to drive the torch in the horizontal direction and the horizontal drive forward stop The range is limited by the limit switch 34b and the horizontally driven reverse top limit switch 34a.

Such driving is operated by a horizontal drive reverse switch, a stop switch, a horizontal drive forward switch installed in the operation panel, and the speed is adjusted by a horizontal drive speed adjustment switch.

Ascending and descending of the torch 1 is made by raising and lowering the guide track frame 32, which will be described with reference to FIG.

The four track guide segment blocks 38 combined under the guide track frame are mounted on the guide track guide shaft 33. When the hydraulic cylinder 36 installed on the guide track frame 32 rises, the guide track frame This pushes up and the guide track frame 32 is also lowered when the hydraulic cylinder descends.

Such driving is operated by a torch up switch, a stop switch, and a torch down switch installed in the operation panel, and the range is limited by the guide track up stop limit switch 40a and the guide track down stop limit switch 40b.

Referring to the working sequence of the present invention configured as described above are as follows.

(1) When the gas and oxygen open valves on the operation panel are turned on, the solenoid valve (797.799) is operated to shut off the oxygen shutoff valves (851, O ₂ SHUT-OFF) and the gas shutoff valves (852, GAS SHUT-OFF). Will be opened.

(2) When gas and oxygen are opened, the worker ignites the torch ignition burner 53 to prepare for work.

(3) The slabs that have been scarfed by the scarfing machine are transported at a low speed while the roller 77 is decelerated while passing through the photosensor 75a, and the rollers 77 at the moment the slab head arrives at the photosensor 75b position. ) Is stopped.

(4) The slab 72 is transferred to the correct working position by the cross transfer car (CT-CAR).

(5) The torch 1 is driven forward by 300mm in the vertical direction, and is moved forward by 250mm in the horizontal direction to the working position.

(6) The solenoid valves 791 and 795 are opened so that the gas and oxygen adjusted by the regulators 801 and 805 are injected into the torch 1 to heat the molten iron 73 to a high temperature.

(7) When the molten snow 73 is preheated, the solenoid valve 792 is opened, and the high pressure oxygen is injected from the torch high pressure oxygen square hole 54, and the torch is driven in the horizontal direction and is attached to the slab head. 73) is removed by melt oxidation.

(8) When the molten snow 73 is completely removed, the preheating gas, preheating oxygen, and high pressure oxygen solenoid valves 795, 791, and 792 are closed to extinguish the flame of the torch 1.

(9) As soon as the gas flame of the torch is extinguished, the torch is driven backward in the vertical and horizontal directions to complete the snow removal operation.

The operations from (3) to (9) are performed automatically by the program logic control (PLC), and it is also possible to work manually using the operation panel as required by the operator.

Such slab shear surface automatic scarfing machine of the present invention automatically removes snow melting, and thus it is possible to remove snow melting at a much faster speed than when the worker manually removes snow melting as in the prior art. The operation rate of the scarfing machine is improved, thereby providing the effect of improving the efficiency of the entire process.

In addition, since the operator automatically removes the snow melting through the operation in the cab, it prevents the worker's safety accidents caused by the minute scale scattered in all directions during the snow removing operation, thereby greatly improving the worker's operation safety. To provide the effect.

Claims (1)

It consists of an upper end for driving the torch 1 for heating and removing the molten snow 73 in a rotational direction and a vertical direction, and a lower end for driving the upper and lower directions while supporting the upper end part. The upper end, A motor 10 for rotating the torch rotary gear 2 provided on the connecting shaft 3 of the torch 1 with the rotary gear 8 provided on the shaft end, and the torch connecting shaft 3 at a predetermined rotational position. A torch rotating part having an axial lock cylinder (4) for fixing and a torch rotation detecting sensor (5) for detecting rotation of the torch (1); It has a quadrangular plate shape for holding and supporting the torch rotating part to its upper surface, the vertical driving wheel 12 and the vertical driving wheel 12 respectively installed on both sides of the torch connecting shaft 3 and the vertical direction, perpendicular to one side of the side portion A vertical drive device having a vertical drive pinion gear 15 which is rotationally driven by a drive DC motor 13; It has a quadrangular plate shape for supporting the vertical drive unit, the horizontal drive wheel 21 is provided on each side portion in the direction parallel to the torch connecting shaft (3), and the horizontal drive is installed on one side of the side portion A horizontal drive pinion gear 26 rotated by a DC motor 24, a vertical drive rail 22 for guiding the vertical drive wheel 12 to move in a vertical direction, and the vertical drive pinion gear ( And a horizontal drive device having a vertical drive rack gear 23 engaged with the 15 to drive the vertical drive device in a vertical direction. The lower end, The track guide segment block 38 has a quadrangular shape, and is installed at a lower portion of the corner portion and has a shape in which the height gradually decreases along one side direction parallel to the torch connecting shaft 3, and the horizontal driving portion at an upper portion thereof. A horizontal drive rail 30 for guiding the wheel 21 to move in a horizontal direction, and a horizontal drive rack gear 31 that meshes with the horizontal drive pinion gear 26 to drive the horizontal drive device in a horizontal direction; Guide track frame 32 having a; Guide track guide shafts 33 whose both ends are supported by guide track fixing beams 39, while slidingly supporting the bottom surface of the track guide segment block 38; It characterized in that it comprises a hydraulic cylinder 36 for driving the guide track frame 32 in a vertical direction by driving the guide track frame 32 in a direction parallel to the torch connecting shaft (3) Slavic Shear Face Automatic Scarping Machine.