KR100762459B1 - Apparatus for cutting bevel angle of curve part of thick steel plate - Google Patents

Abstract

The present invention relates to a curved portion improved angle cutting device for obliquely cutting the upper and lower portions of the structure so that the joint portion of the heavy steel sheet is formed completely penetration.

To this end, the present invention by the device moving unit 70 and the device moving unit 70 consisting of a drive motor (4) and the driving wheels (9, 10) rotated by one side of the upper surface of the base (1) A turning guide 71 consisting of a driven follower wheel 18 and 18 'and a rack bar 21 to move in accordance with a curved portion improvement angle while extending, and extending from the turning guide 71. A direction turning part 72 consisting of a guide wheel 29 fixed downward in the double acting link member 26 and an upper surface of the double acting link member 26 of the direction turning part 72. Provides a curved portion improved angle cutting device, characterized in that consisting of the improved angle cutting torch portion 73 made of a cutting torch 40 is fixed to the slide block 32 to be elevated.

As described above, the present invention automatically cuts the upper and lower angles of improvement on the heavy steel sheet, thereby preventing burns from flames and scattering dross, forming a uniform root surface to obtain a complete penetration, and improving productivity. There is.

Curved part improvement angle, cutting torch part, device moving part, direction changing guide part, direction changing part

Description

Curved angle angle cutting device {APPARATUS FOR CUTTING BEVEL ANGLE OF CURVE PART OF THICK STEEL PLATE}

1 is a schematic view showing a method for cutting a conventional heavy plate curved portion improved angle;

Figure 2 is a perspective view showing the overall configuration of the curved portion improved angle cutting device according to the present invention;

3 is a perspective view showing the overall configuration of the curved portion improved angle cutting device according to the present invention;

Figure 4 is a plan view showing a device drive unit and the turning guide portion constituting the curved portion improved angle cutting device according to the present invention;

5 is a plan view showing the operating relationship of the turning guide portion constituting the curved portion improved angle cutting device according to the present invention;

6 is a perspective view showing an operation relationship between the turning part and the improved angle cutting torch constituting the curved portion improved angle cutting device according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

1: Base 3: Worm Gear 4: Drive Motor 5: Worm Wheel 6: Rotary Shaft 7, 8: Bearing Block

9,10: drive wheel 70: device moving part 11 ': bearing 13: lever 11: gear shaft

12: pinion gear 15, 15 ': vertical shaft 17, 17': second link member 14: first link member                 

16,16 ': steering arm 18,18': driven wheel 20: third link member 25: guide plate 21: rack bar

23: spring 24: tension adjusting screw 71: direction switching guide portion 26: double acting link member

27: wheel axle 29: guide wheel 72: direction change section 31: lead screw 32: slide block

33: vertical rack bar 36: cutting tochigo tennis 39: distributor 40: cutting torch

73: improved angle cutting torch part

The present invention relates to a curved portion improved angle cutting device, and more particularly to a curved portion improved angle cutting device for obliquely cutting the upper and lower parts of the structure so that the joint portion formed in the cell portion of the ladle composed of heavy steel plate is formed completely. .

In general, the ladle is a facility that takes molten steel from the converter and stores and transports the molten steel until the completion of the casting process of the performing process after the second refining treatment.

In the related art, as shown in FIG. 1, the developed part of the cell portion of the ladle was cut by marking directly on a heavy steel sheet or cut into the same shape by the NC cutter.

The cut surface as described above becomes the root surface cutting line, and when the cutting of the root surface is completed, the upper improvement angle cutting line is marked on the curved portion, that is, the connecting portion of the steel sheet.

When the upper marking operation is completed, open the main valve of the oxygen storage tank and fuel gas storage tank, and adjust the operating pressure of oxygen and fuel gas on the flow gauge so that it is controlled by the valve through the gas distributor through the oxygen hose and fuel gas hose. do.

After opening the fuel gas supply valve and igniting with an igniter, the low pressure oxygen valve is gradually opened to control the flame, and when the flame control is completed, the manual cutting torch is placed on the upper cutting angle cutting surface to start preheating and reaches the appropriate temperature. When the high pressure oxygen valve is opened, the high pressure oxygen is supplied to the preheating point and oxidation starts at the same time as cutting is performed.

When cutting is started, the manual cutting torch is cut along the upper improvement angle cutting surface. When the cutting of the upper improvement angle cutting surface is completed, the steel plate is turned over to mark the lower improvement angle cutting line and then the lower improvement angle as described above. You just need to complete the cut.

The NC cutting machine is an automatic cutting machine that controls the straight cutting line and the arc, that is, the curved cutting along the traveling rail corresponding to the y axis by numerically controlling the vertical cutting torch on the transverse rail corresponding to the x axis, However, the curved part improvement angle is possible only if the torch direction is toward the center point or the fixed shaft part is located at the center part.

Marking the upper cutting angle cutting line and the lower cutting angle cutting line on the steel plate as described above, and then cutting by manual cutting torch, the excessive time of marking time and the operator directly holding and cutting the manual cutting torch burns due to high temperature flame Partial penetration due to non-uniformity of the root surface is formed and work productivity decreases due to excessive occurrence of gouging work on the opposite side of the welded part. There is a problem of increasing the workload of the worker due to dust generation due to the addition of a work process.

In order to solve the above problems, the present invention provides a device moving unit for moving the cutting device, the direction change guide for guiding the cutting device to change direction in the direction of the curved portion, the direction change guide along the curved portion It consists of the direction change part moving in relation to the part and the improvement angle cutting torch part connected to it to cut the improvement angle, and the curved part improvement angle to securely cut the curved part improvement angle of heavy steel plate and at the same time obtain a good cutting surface. The object is to provide a cutting device.

In order to achieve the above object, the present invention is a drive wheel fixed to both ends of the rotary shaft is rotatably inserted into a bearing block fixed to both ends of the upper surface of the base, a worm wheel fixed to the center of the rotary shaft, An apparatus moving part comprising a driving motor having a rotating shaft having a worm formed therein so as to be engaged with the gear;

A pinion gear fixed to a rotating shaft having a flow lever while rotatably coupled to a bearing hole at the other center of the base on which the apparatus moving part is installed, and fixedly movable to both sides of the base while inserting the flow lever of the rotating shaft. A first link member for fluidly fixing the second link member fixed to the pair of vertical shafts at both ends thereof, a driven wheel rotatably fixed to the steering arm fixed at one side of the pair of vertical shafts, and A third link member fixed to an upper end, a rack bar supported by the guide plate so as to be movable outside thereof, and a pin bar gear-engaged with the pinion gear, and a tension formed by inserting and passing a spring formed through the block formed at one side thereof; Direction change guide section consisting of adjusting screws,

A double direction link member welded and fixed to an upper end side of the rack bar of the redirection guide part, a redirection part including a guide wheel rotatably fixed to a wheel shaft fixed downward at one end thereof;

Vertical rack gear coupling with the pinion gear formed at one end while penetrating through the through-hole formed in the sliding block fixed to the upper surface of the bidirectional link member of the reversing portion of the sliding block with a lead screw; Curved angle improved angle cutting portion comprising an improved angle cutting torch consisting of a cutting torch connected to the supply hose extending from the distributor fixed to the upper surface of the vertical rack bar while being movably fixed to the bracket formed on the lower end of the bar. Provide the device.

In addition, the present invention provides a curved portion improved angle cutting device, characterized in that the drive wheel of the device moving unit and the guide wheel of the direction change unit is composed of a wheel made of a magnetic material.

EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention is demonstrated in detail based on attached drawing.

Figure 2 is a perspective view showing the overall configuration of the curved portion improved angle cutting device according to the present invention, Figure 3 is a combined perspective view showing the overall configuration of the curved portion improved angle cutting device according to the present invention, Figure 4 according to the present invention It is a top view which shows the apparatus drive part and direction change guide part which comprise the curved part improvement angle cutting apparatus.                     

As shown in Figure 2 to 4, the device moving part 70 constituting the curved portion improved angle cutting device according to the present invention is a gear box (Gear Box) 2 is fixed to the upper end of the base (1), The pinion gear 12 is inserted into and fixed to the gearbox 2 so as to be rotatable to the gearbox 2, and orthogonal to the rotation shaft 6 connected to the gearbox 2. The drive motor 4 is fixed, and the worm gear 3 is fixed to the drive motor 4 to be engaged with the pinion gear 12, and bearing blocks (Bearing Block) 7,8 at both ends of the rotation shaft (6). ) Are inserted to be symmetrical and fixed on the base 1, and driving wheels 9 and 10 having magnets inserted or fixed at predetermined intervals on the outer circumferential surface of the wheel are fixed at both ends of the rotation shaft 6. It is fixed.

The turning guide portion 71 constituting the curved portion improved angle cutting device according to the present invention is connected to the through-holes formed on the opposite sides of the base 1 so that the vertical axis (15, 15 ') is rotatable, Steering arms 16 and 16 'are inserted into the center of the vertical shafts 15 and 15' to be welded, and driven wheels 18 and 18 'are rotatably connected to the steering arms 16 and 16'. ,

The second link members 17 and 17 'are fixed to the vertical shafts 15 and 15', and one side of the fixing pins 19 and 19 'is welded to the second link members 17 and 17'. The first link member 14 is inserted into the fixing pins 19 and 19 'so as to be tiltable. In addition, hole portions A formed at both ends of the third link member 20 are inserted into upper ends of the vertical shafts 15 and 15 ′ so as to be tilted.

Block 22 is fixed to one end of the third link member 20, the "a" shaped guide plate 25 is fixed to the end of the base (1), the guide plate 25 and the third link member The rack bar 21 is attached to the surface between the 20 so that the sliding is possible, and the tension adjusting screw 24 is in communication with the block 22 at one end of the rack bar 21 to the spring (23) Screwed together.

In addition, a gear shaft 11 is inserted and connected to the base 1 so as to be rotatable, and a “l” shaped lever 13 is inserted and fixed at the center of the gear shaft 11, and the lever 13 is fixed. One end of the other end is configured to be inserted into a rectangular oval groove A formed in the center of the first link member 14, the pinion gear 12 is inserted into the upper end of the gear shaft (11).

Bidirectional link member 26 is fixed to the rack bar 21, and the bidirectional link member 26 is interlocked with the redirection guide 71 configured as described above. The wheel shaft 27 is connected, the wheel shaft 27 is configured such that the guide wheel 29 is rotatable through the bearing 28, the magnet is attached to the outer circumference of the guide wheel 29 at regular intervals or The wheel itself is made of magnetic material.

The improved angle cutting torch portion 73 is positioned so as to be movable left and right with the double-acting link member 26 of the redirection unit 72 configured as described above, and the improved angle cutting torch portion 73 is the double-acting link member. A block 30 is fixed to 26 to move the cutting torch 40 back and forth, and the block 30 is configured such that the slide block 32 can slide through a lead screw 31. In addition, a vertical rack bar 33 is gear-coupled with the pinion gear to the slide block 32, the pinion gear is connected to the lifting pin (35).

A cutting torch fixture 36 is connected to the vertical rack bar 33 via a tilting pin 38 to be tilted by the tilting pin 38, and the cutting torch fixture 36 includes a cutting torch. 40 is connected to the distributor 39 via a hose, to which the valves 41, 42 and 43 are coupled, respectively.

A fuel gas hose 44 and an oxygen hose 45 are connected to the distributor 39, and the hoses 44 and 45 are connected to the fuel gas storage tank 51 and the oxygen storage tank through the hydraulic gauges 46 and 49. 48, valves 47 and 50 are connected to the fuel gas reservoir 51 and the oxygen reservoir 48, respectively.

Hereinafter, the operation of the improved angle cutting device according to the present invention will be described in detail.

5 is a plan view showing the operating relationship of the turning guide portion 71 constituting the curved portion improved angle cutting device according to the present invention, Figure 6 is a turning portion constituting the curved portion improved angle cutting device according to the present invention 72 is a perspective view showing an operation relationship between the improved angle cutting torch portion 73.

After installing the improved angle cutting device according to the present invention in the bending margin on the heavy steel plate, turn the tension adjusting screw 24 to adjust the tension of the spring 23 and then pull the double acting link member 26 to pull the guide wheel 29. When placed on the root plane cutting line 52, the double-acting link member 26 advances the connected rack bar 21 at the same time, the rack bar 21 is stopped by the tension of the spring 23, and at the same time The rack bar 21 rotates the geared pinion gear 12, the pinion gear 12 rotates the connected shaft and the lever 13 in the forward direction of the double acting link member 26, The lever 13 advances the first link member 14 in the rotational direction of the lever 13.

The first link member 14 has a second link member 17, 17 'connected via pins 19, 19' and a vertical axis 15, 15 'connected to the second link member 17, 17'. Rotate). At this time, when the vertical shafts 15 and 15 'rotate, the steering arms 16 and 16' connected to the vertical shafts 15 and 15 'rotate, and the steering arms 16 and 16' are driven wheels 18. , 18 ') to redirect the driven wheels 18, 18' to form a concentric arc on the root face cutting line 52.

After the operation of the driven wheels 18 and 18 'is completed as described above, the tilting pin 38 of the cutting torch fixture 36 is turned to turn the cutting torch 40 fixed to the cutting torch fixture 36. ) Rotates the tilting pin 38 to reach a predetermined angle and stops the operation of the tilting pin 38, and turns the lifting pin 35 of the vertical rack bar 33 to lift the lifting pin 35. Pinion gear 34 connected to actuates the vertical rack bar 33 geared.

When the vertical rack bar 33 is lowered, the cutting torch 40 connected to the vertical rack bar 33 is simultaneously lowered, and when the cutting torch 40 is close to the cutting line, the lifting pin 35 The operation of the will stop, whereby the height adjustment of the cutting torch 40 is completed.

When the lead screw 31 on the double acting link member 26 is turned to adjust the front and rear positions of the cutting torch 40, the slide block 32 screwed with the lead screw 31 is advanced, and the slide block As the 32 advances, the vertical rack bar 33 connected to the slide block 32 and the cutting torch 40 connected to the vertical rack bar 33 move forward simultaneously, and the cutting torch 40 moves upward. If the improved cutting line 53 is matched, the operation of the lead screw 31 is stopped.

When the position adjustment of the cutting torch 40 is completed as described above, the cutting speed is set in a control box (not shown), and then the main valves 47 and 50 of the oxygen storage tank 48 and the fuel gas storage tank 51 are provided. To release the respective gas by adjusting the working pressure in each pressure gauge (46, 49), each gas controlled by the gauge (46, 49) through the respective induction hose (44, 45) The oxygen supplied to the distributor 39, the oxygen supplied to the distributor 39 is branched into the low pressure oxygen hose 66 and the high pressure oxygen hose 67, by the low pressure oxygen valve 43 and the high pressure oxygen valve 42. It is supplied to be controlled, and the fuel gas supplied to the distributor 39 is supplied to be controlled by the fuel gas valve 41 through the hose 44.

When the work preparation is completed as described above, the fuel gas valve 41 and the low pressure oxygen valve 43 are opened to ignite the cutting torch 40, and then the flame is adjusted. The preheating is started by placing the cutting torch 40 at the first starting point of the line 53. When the preheating part reaches a proper temperature, the high pressure oxygen valve 42 is opened, and the high pressure oxygen is injected into the preheating part to oxidize. And cutting starts.

When the cutting starts, the control box (not shown) controls the driving motor 4, and the driving motor 4 drives the worm gear 3 and the worm wheel 5 geared thereto, The worm wheel 5 rotates the rotary shaft 6 and the driving wheels 9 and 10 connected thereto through the bearing blocks 7 and 8 to advance the device moving part 70.                     

When the driving wheels 9 and 10 are driven, the driving wheels 9 and 10 move forward in the same trajectory as the direction of the driven wheels 18 and 18 ′ forming the concentric arcs along the curved portion by the guide wheel 29.

At this time, the magnet of the circumferential surface of the guide wheel 29 proceeds without slip along the root surface cutting line 52, and the double acting link member 26 fixing the guide wheel 29 is the guide wheel 29. The rack bar 21 is connected to operate with the guidance of the rack bar 21 is fixed by the tension of the spring 23 via the tension adjusting screw 24 and the block, and the rack bar ( A pinion gear 12 geared with 21, a gear shaft 11 connected to the pinion gear 12, the first link member 14 connected to the gear shaft 11, and a connecting pin 19, 19 '), Vertical links 15 and 15' connected to the second link members 17 and 17 'and the second link members 17 and 17', and steering arms 16 connected to the vertical axes 15 and 15 '. 16 ') and the driven wheels 18 and 18' connected to the steering arms 16 and 16 'in their original positions, and the cutting torch 40 connected to the double acting link member 26 The upper dog Will be cut progresses along the cutting line (53).

When the cutting process proceeds as described above and reaches the end point of the upper improvement cutting line 53, the high pressure oxygen valve 42, the low pressure oxygen valve 43, and the fuel gas valve 41 are locked in order, and then the control is performed. Control on a box (not shown) to turn off the device.

When the upper improvement angle cutting is completed as described above, turning the tilting pin 38 of the cutting torch fixture 36 for cutting the lower improvement angle, the cutting torch fixture 36 and the cutting torch 40 connected thereto are tilted. When the cutting torch 40 rotates through the pin 38 and the cutting torch 40 coincides with the angle of the lower improvement angle cutting line 54, the tilting pin 38 is stopped.

When the angle adjustment of the cutting torch 40 is completed as described above, the lifting pin 35 of the vertical rack bar 33 is turned. The lifting pin 35 turns the connected pinion gear 34, and the pinion gear 35 operates the vertical rack bar 33 geared together.

When the vertical rack bar 33 is lowered, the cutting torch 40 connected to the vertical rack bar 33 is lowered at the same time, when the cutting torch 40 is close to the lower angle of improvement cutting line 54 By stopping the operation of the lifting pin 35, the height adjustment is completed.

When the lead screw 31 on the double-acting link member 26 is rotated to adjust the front and rear positions of the cutting torch 40, the slide block 32, which is screwed forward, is moved forward, and the vertical rack bar 33 connected thereto. As the cutting torch 40 connected to the vertical rack bar 33 moves, the cutting torch 40 coincides with the lower improvement cutting line 54 and stops the operation of the lead screw 31.

When the position adjustment of the cutting torch 40 is completed as described above, the lower improvement angle is completed in the same manner as described above.

When the cutting of the curved part of the curved part of the curved part is completed, the device is turned to cut the curved part of the curved part of the curved part, and the cutting torch 40 is cut in the upper sharp angle of the upper part of the curved part which is a bending margin on the heavy steel plate. It is installed in the line 52 'side.

By adjusting the tension of the spring 23 by turning the tension adjusting screw 24, when the driven wheels 18 and 18 'are aligned with the driving wheels 9 and 10, the operation of the tension adjusting screw 24 is stopped. When the guiding wheel 29 connected to the double acting link member 26 is positioned at the root surface cut line 52 ′ of the “ㅛ” portion, the rack bar 21 is moved by the restoring force of the spring 23. 23 is moved to the side, the pinion gear 12 geared to the rack bar 21 is rotated, the pinion gear 12 is connected to the gear shaft 11 and the lever 13 connected to the first link member Advance to the rear of the (14), the first link member 14 is a vertical axis connected to the second link member (17, 17 ') and the second link member (17, 17') connected via a pin ( 15, 15 '). In this case, the vertical shafts 15 and 15 'are rotated, and the steering arms 16 and 16' connected to the vertical shafts 15 and 15 'are rotated, and the steering arms 16 and 16' are connected to the driven wheels. (18, 18 ') is redirected to follower wheels (18, 18') to form a concentric arc with the root plane cut line (52 ').

As described above, when the direction change of the driven wheels 18 and 18 'is completed, when the tilting pin 38 of the cutting torch fixture 36 is turned, the cutting torch fixture 36 is fixed to the cutting torch 40. ) And the pin is rotated, and when the angle of the cutting torch 40 reaches a predetermined angle, the operation of the tilting pin 38 is stopped, and when the lifting pin 35 of the vertical rack bar 33 is turned, The pinion gear 34 connected to the lifting pin 35 rotates, and the pinion gear 34 operates the vertical rack bar 33 geared thereto.

When the vertical rack bar 33 is operated, when the cutting torch 40 connected to the vertical rack bar 33 is close to the upper cutting angle cutting line, the operation of the lifting pin 35 is stopped, and the cutting torch When the height adjustment of the 40 is completed, turning the lead screw 31 on the double-acting link member 26 to adjust the front and rear position of the cutting torch 40, the sliding block screwed with the lead screw 31 ( 32 is moved, and when the slide block 32 is moved, the connected vertical rack bar 33 and the cutting torch 40 connected to the vertical rack bar 33 are simultaneously moved so that the cutting torch 40 is moved. The upper angle of improvement is coincident with the cutting line, the cutting method is the same as the "ㅗ" part.

When cutting is started, the control box is controlled to drive the driving motor 4, and the driving motor 4 drives the worm gear 3 and the worm wheel 5 geared to the worm gear 3. The rotary shaft 6 and the driving wheels 9 and 10 connected to the worm wheel 5 are rotated through the bearing blocks 7 and 8 to advance the apparatus.

When the driving wheels 9 and 10 are driven, they move forward in the same trajectory as in the direction of the driven wheels 18 and 18 'that form concentric arcs along the curved portion by magnets formed in the guide wheel 29. .

At this time, a magnet formed on the outer circumferential surface of the guide wheel 29 proceeds without slipping the root surface cutting line, and the driven wheels 18 and 18 'are maintained at the initial position by the spring 23. That is, the double acting link member 26 fixing the guide wheel 29 is connected to the rack bar 21 and the tension adjusting screw 24 connected with the guide wheel 29 by the restoring force of the spring 23. And the lever connected to the gear shaft 11 connected to the pinion gear 12 and the pinion gear 12 screwed to the rack bar 21 and to the gear shaft 11. Keep 13) in its original position. The lever 13 is a vertical axis connected to the first link member 14 and the connected fixing pins 19 and 19 'connected to the second link member 17 and 17' and the second link member 17 and 17 '. Proceed with the steering arm (16, 16 ') and the driven wheel (18, 18') connected to the (15, 15 ') and the vertical axis (15, 15') to the first position, and the double acting link member (26). The cutting torch 40 connected to the cutting is progressed while moving along the upper cutting angle cutting line.

When the cutting progresses to the end point of the upper improvement angle cutting line, the high pressure oxygen valve 42, the low pressure oxygen valve 43, and the fuel gas valve 41 are locked in the order of control on the control box (not shown). Turn off the device.

The present invention is to automatically cut after adjusting the angle of the cutting torch without marking the upper and lower angle of improvement cutting line on the heavy steel sheet, thereby preventing burns from flames and scattering dross, in particular to form a uniform root surface It is possible to obtain complete penetration by improving the productivity of the gouging work, and to improve productivity by reducing the gouging work, and to reduce cost and quality by reducing the work input through improving the grinding process. It has the effect of protecting workers from dust generated during cutting and grinding.

Claims (2)

Drive wheels 9 and 10 fixed to both ends of the rotary shaft 6 rotatably inserted into the bearing blocks 7 and 8 fixed to both ends of the upper surface of one side of the base 1, and a central portion of the rotary shaft 6. A device moving part (70) comprising a worm wheel (5) fixed to the drive motor and a drive motor (4) having a worm gear (3) formed thereon so as to be engaged with the gear; A pinion gear 12 fixed to a gear shaft 11 having a lever 13 while rotatably engaging with a bearing 11 ′ of the other central portion of the base 1 on which the device moving part 70 is installed; And a second link member (17, 17 ') fixed to a pair of vertical shafts (15, 15') that are movably fixed to both sides of the base (1) while inserting the lever (13) of the gear shaft (11). ) And a driven wheel rotatably fixed to a steering arm (16, 16 ') fixed to one side of the pair of vertical shafts (15, 15') and the first link member (14) for fluidly fixing both ends). 18 and 18 ', the third link member 20 fixed to the upper ends of the vertical shafts 15 and 15' and the pinion gear 12 being supported by the guide plate 25 so as to be movable outside thereof. And a tension adjusting screw 24 which is engaged with the rack bar 21 by penetrating the rack bar 21 to be engaged with the gear bar and the spring 23 and penetrating the block 22 formed on the rack bar 21. Comprising direction changing guide portion 71 and; The double-acting link member 26 welded to the upper end side of the rack bar 21 of the redirection guide portion 71 and the guide wheel rotatably fixed to the wheel shaft 27 fixed downward from one end thereof ( 29 and a turning unit 72; A slide block 32 fixedly movable by the lead screw 31 in the block 30 fixed to the upper surface of the double-acting link member 26 of the redirection unit 72, and a through hole formed in one side thereof While seated on the vertical rack bar (33) which is coupled to the pinion gear (34) formed at one end and penetrates (32 ') and the fastener (36) fluidly fixed to the bracket (33') formed at its lower end. Consists of an improved angle cutting torch portion 73 consisting of a cutting torch 40 connected to the supply hose (44, 66, 67) extending from the distributor 39 fixed to the upper surface of the vertical rack bar (33) Curved angle angle cutting device characterized in that. The method of claim 1, Driving wheel (9, 10) of the device moving unit 70 and the guide wheel 29 of the turning unit 72 is curved portion improved angle cutting device, characterized in that consisting of a wheel made of a magnetic material.

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