KR101037773B1 - Circular-type automatic welding apparatus - Google Patents

Abstract

PURPOSE: An automatic endless type pipe welding device is provided to improve working efficiency and guarantee uniform welding quality regardless of an operator's skill-level. CONSTITUTION: An automatic endless type pipe welding device comprises a clamping unit. The clamping unit comprises a guide rail, a pressing plate, a rotary shaft, a tension bolt, a pressing bar, a spacing bolt, a pressing unit, a travelling unit, a guide roller, a guide roller body, a roller portion, a clamping unit body, a cam, and a handle. The guide rail comprises a rack(711), a rail(712), and a connection part. The rotary shaft becomes the center of the relative motion between the pressing plate and the guide rail. The tension bolt supports a spring. The pressing bar linearly contacts the cylindrical surface of the pipe. The pressing unit maintains the space and out-of-roundness of the guide rail.

Description

Circular-type automatic welding apparatus

The present invention relates to an orbital pipe automatic welding device, and more particularly, to an orbital pipe automatic welding device for performing welding while traveling along a track provided on the outer circumferential surface of the pipe.

The pipeline is a moving means for transporting fluids such as oil and gas, and is connected by welding of unit pipes. Pipelines are divided into On-Shore and Off-Shore, and often connect between tens and hundreds of kilometers. Due to the manual welding of the pipeline, there are problems such as welding quality and work efficiency deterioration depending on the skill of the operator.

In order to solve the problems of the conventional pipe welding work by the manual work, the Patent Publication No. 10-2009-0026541 discloses a rail-mounted automatic welding device for automatically performing welding while running on the rail.

However, this conventional automatic welding device has a problem in that the configuration is complicated and difficult to mount and remove on the rail, reducing the efficiency of the work.

The present invention is to solve the problems of the pipe welding made by the above-described manual work, regardless of the skill of the operator welding quality is consistently ensured, the orbital pipe automatic welding device that can produce the effect of improving work efficiency To provide that purpose.

Orbital pipe automatic welding device of the present invention for achieving the above object is mounted to the pipe circumference, the guide rail portion 710 having a rack 711 and a rail 712, the connecting portion 610; Pressing unit 510 for maintaining and correcting the distance and roundness of the guide rail portion 710 with respect to the circumference; A driving unit 210 of the carriage body 100 moving along the guide rail unit 710; And guide roller 313 rotates along the side of the rail (712); A guide roller body 312 having a rotation axis orthogonal to the rotation axis of the guide roller 313, the angle of which is automatically changed along the curvature of the guide rail portion 710; And a spring 318 for preventing the unbounded rotation of the guide roller body 312 so as to move within a predetermined angle. The roller part 310 and the roller part 310 are mounted on the lower part and the spring on the upper part. A clamping portion body 115 having a hole in which 114 is mounted; An eccentric cam 122 having a center of rotation 121 perpendicular to an axial direction of the pressure rod 116 on a side of the pressure rod 116 penetrating the hole and the spring 114; And a handle 117 attached to an upper portion of the cam 122 to push the pressure bar 116 forward and backward in the axial direction of the pressure bar 116 to closely contact the roller part 310 to the side of the guide rail. The clamping unit 110 is configured to include.

In addition, the driving unit 210 includes a driving unit body 214; A reducer integrated motor 216 mounted to the traveling body 214; A pinion 213 directly connected to the speed reducer that travels along the rack 711 of the guide rail portion 710; And a bolt 212 penetrating the spring 215 inserted into the four corner holes of the driving body 214 to the lower portion of the carriage body 100.

In addition, the pressing portion 510 is installed in close proximity to the pressing plate 514, one end of the pressing plate 514, penetrates the two shaft support 516, the guide rail portion 710 and the pressing plate 514 A rotation axis 517 which is a center of relative motion between A tension bolt 511 installed at one end of the pressure plate 514 to be closer to the rotary shaft 517, and supporting a spring 512 to push the pressure plate 514 closer to the rail 712; A pressure rod 515 installed at a lower end of the other end of the pressure plate 514 to be in line contact with the circumferential surface of the pipe; And a gap adjusting bolt 513 penetrating through the rail 712 and pressing an upper end of the other end of the pressing plate 514.

In addition, the connecting portion 610 of the guide rail portion includes a fixed block 612 having a hole for connecting the lower portion of the joint of the rail 712 surrounding the circumferential surface of the pipe at regular intervals; A connection block fixing bolt 615 through which a hole formed at one end of the fixed block 612 and a hole formed at one end of the rail 712 are connected to each other; A position fixing bolt 614 fixed to a hole formed at the center of the fixing block 612 and tightened so that a step difference between two end portions of the rail 712 is in contact; And a connection cam 613 installed in the hole formed at the other end of the fixed block 612 and protruding to the hole formed at the other end of the rail 712 to couple the fixed block and the rail by rotation. can do.

A horseshoe wire guide roller body 427; Two wire guiders 431 installed in respective holes penetrating the end portions of the body facing the horseshoe; Two interlocking spur gears 412 provided with the guider therebetween; Wire guide rollers 416 respectively installed on the two spur gears 412; And a wire supply unit 410 including a motor 432 for driving one of the two spur gears.

Orbital pipe automatic welding device of the present invention is equipped with a welding torch, so that the welding can be carried out while proceeding along the circumference of the pipe, regardless of the skill of the operator ensures a certain quality of welding, work efficiency is improved Can provide an effect.

1 is a schematic view of the orbital welding device according to the first embodiment of the present invention.
Figure 2 is an exploded perspective view of the clamping portion according to the first embodiment of the present invention.
Figure 3 is a side view of the body of the welding apparatus according to the first embodiment of the present invention.
Figure 4 is an exploded perspective view of the running portion according to the first embodiment of the present invention.
5 is an exploded perspective view of the roller unit according to the first embodiment of the present invention.
6 is a cross-sectional view showing a guide roller rotation method according to the first embodiment of the present invention.
Figure 7 is a partial perspective view of the guide roller tension (angle) adjustment spring according to the first embodiment of the present invention.
Figure 8 is a schematic diagram showing the relative position of the guide roller according to the change in the guide rail curvature according to the first embodiment of the present invention.
Figure 9 is a cross-sectional view of the lower body of the welding apparatus according to the first embodiment of the present invention.
10 is a side view of the welding apparatus body according to the first embodiment of the present invention.
11 is a schematic view of a wire supply unit according to a second embodiment of the present invention.
12 is an exploded perspective view of the wire supply unit according to the second embodiment of the present invention.
13 is an exploded perspective view of the pressing unit according to the first embodiment of the present invention.
14 is a schematic view showing a pressing method of the pressure plate according to the first embodiment of the present invention.
15 is an exploded perspective view of a connecting portion according to the first embodiment of the present invention.
16 is a perspective view of a guide rail portion according to the first embodiment of the present invention.
Fig. 17 is a schematic diagram showing the removal procedure of the guide rail portion according to the first embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. These examples are provided to illustrate the scope of the invention to those skilled in the art. The present invention is not limited to the following embodiments, but may be implemented in various forms within the scope of the claims of the present invention.

1 is a schematic view of an orbital welding device according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of the clamping part according to the first embodiment of the present invention, and FIG. 3 is a first embodiment of the present invention. 4 is an exploded perspective view of the traveling part according to the first embodiment of the present invention, FIG. 5 is an exploded perspective view of the roller part according to the first embodiment of the present invention, and FIG. FIG. 7 is a cross-sectional view showing a guide roller rotating method according to the first embodiment, FIG. 7 is a partial perspective view of the guide roller tension (angle) adjusting spring according to the first embodiment of the present invention, and FIG. 8 is a first embodiment of the present invention. Fig. 9 is a schematic view showing the relative position of the guide roller according to the change of the guide rail curvature according to the example, Fig. 9 is a cross-sectional view of the lower part of the body of the welding apparatus according to the first embodiment of the present invention, and Fig. 10 is a first embodiment of the present invention. By the welding apparatus body side view, Figure 11 is FIG. 12 is an exploded perspective view of the wire supply unit according to the second embodiment of the present invention, and FIG. 13 is an exploded perspective view of the pressurization unit according to the first embodiment of the present invention. 14 is a schematic view showing a pressing method of a pressure plate according to a first embodiment of the present invention, FIG. 15 is an exploded perspective view of a connecting part according to the first embodiment of the present invention, and FIG. Fig. 17 is a perspective view showing a guide rail portion according to one embodiment, and Fig. 17 is a schematic diagram showing the removal procedure of the guide rail portion according to the first embodiment of the present invention.

First, the structure of an orbital-type (circular-type) welding apparatus according to an embodiment of the present invention will be described, and then the operation of the welding apparatus will be described.

The orbital pipe welding device 1 shown in FIG. 1 is composed of a guide rail portion 710 and a carriage body 100.

1 and 16, the orbital pipe welding apparatus according to the first embodiment of the present invention is mounted on the pipe circumference, the guide rail having a rack 711, rail 712, connecting portion 610 A portion 710; A driving unit 210 moving along the guide rail unit 710; A fixing part 2 coupling the driving part 210 to a guide rail; And a pressing unit 510 for maintaining and correcting the distance and roundness of the guide rail with respect to the circumference.

As shown in FIG. 16, the guide rail portion 710 has a pair of rails 712 formed in an arc shape and a connecting portion 610 connecting the rails 712 to each other and a rack coupled to an outer surface of the rail. and a rack 711.

As shown in Figure 1, the guide rail portion 710 is installed in the outer diameter of the pipe circumference, and becomes a moving passage for the carriage body 100 moves.

As illustrated in FIG. 16, a rack 711 having gear teeth is coupled to a surface of the rail 712, and a V rail 713 is formed at a side surface thereof.

As such, since the rack 711 and the V rail 713 allow the carriage body 100 coupled to the guide rail portion 710 to travel without shaking, the driving speed of the carriage body 100 can be increased. do.

As shown in FIGS. 15 and 16, the connection part 610 connects the joints of the rails 712, and a fixing block 612 for connecting both joints of the rails 712 and the fixing blocks. 612, a connection block fixing bolt 615 connecting through the rail 712 corresponding thereto, and a position fixing bolt 614 that is tightened so that a step difference between the two end portions of the rail 712 is in contact with the connecting block fixing bolt 615. It comprises a connecting cam 613 for coupling the fixed block 612 and the rail 712 by the rotation.

The fixed block 612 is a connecting plate formed with a plurality of holes, the connection cam 613, the position fixing bolt 614 and the connection block fixing bolt 615 is coupled to each of the holes, a plurality of rails 712 By connecting to form a connection portion 610 for forming one guide rail portion 710.

Although FIG. 16 illustrates that one guide rail portion 710 is formed of two rails 712, the number of rails 712 is not limited thereto.

The connection block fixing bolt 615 is coupled to a hole formed corresponding to the rail 712 and the fixed block 612, and firmly couples the rail 712 and the fixed block 612.

The positioning bolt 614 is a guide for easily fixing the end of the rail 712 to the fixing block 612, as shown in Figure 17, the groove portion corresponding to the shape of the positioning bolt 614 It is formed at the end of the rail 712 to be coupled.

The connection cam 613 protrudes through the fixing block 612, and the stop ring 611 is coupled to the protruding portion to fix the connection cam 613.

Since the connection cam 613 is repeatedly locked and released by rotating 180 degrees, the rail 712 can be easily fixed or detached from the fixed block 612.

Since the position fixing bolt 614 easily matches one end of the rail with the other end of the rail, the time for attaching the guide rail portion 710 to the pipe is shortened.

The connection part 610 of such a configuration can be easily removed and mounted by applying a cam type fastening device, thereby reducing the time for installing the guide rail part 710 on the pipe.

In addition, since a step does not occur between the connected rails 712, smooth running of the mounted carriage body 100 is possible.

The driving unit 210 is a portion in which the pinion 213 is directly connected to the motor 216 in which the reducer is integrated so that the carriage body 100 travels along the rack 711 of the guide rail unit 710. .

As shown in FIG. 4, the driving unit 210 includes a driving unit body 214, a reducer integrated motor 216 mounted to the driving unit body 214, and is directly connected to the reducer and the rack ( A pinion 213 engaged with the 711 and a bolt 212 penetrating the spring 215 inserted into the four corner holes of the driving body 214 to be coupled to the lower portion of the carriage body 100. It is configured, the pinion 213 and the rack 711 of the guide rail portion 710 is engaged to move the carriage body 100.

In addition, a spring 215 penetrates through one end of the driving part fixing bolt 212 to be firmly coupled to the lower portion of the carriage body 100.

In addition, it is preferable that the bearing 211 is coupled to the drive shaft formed at the center of the pinion 213 to reduce the frictional force when the drive shaft is rotated.

The fixing portion 2 is engaged with the V rail 713 formed on the side of the rail 712 of the guide rail portion 710, the portion fixing the carriage body 100 so as not to be separated from the guide rail portion 710 to be.

The fixing part 2 includes a pair of rollers 310 engaged with the V rails 713 and a clamping part 110 that presses the rollers 310 to the V rails 713.

As shown in FIG. 5, the roller part 310 has a guide roller 313 rotating along a side surface of the rail 710, a rotation shaft orthogonal to a rotation axis of the guide roller 313, and the rail ( A roller portion including a guide roller body 312 that is automatically changed in accordance with the change in curvature of the 710, and a spring 318 to prevent unrestricted rotation of the guide roller body 312 to move within a predetermined angle. 310 is configured to include.

As shown in FIG. 8, since the angle of the guide roller 313 of the roller part 310 is automatically changed to correspond to the curvature of the rail 712, the guide roller 313 of the roller 310 may be separated from various rails 712 from small diameter to large diameter. It is possible to drive without replacing parts.

As shown in Figure 5 and 6, the rotating shaft of the guide roller 313 is preferably provided with a bearing 314 and the stop ring 315 to smoothly rotate, the guide roller 313 Is fixed to the guide roller body 312 by the roller fixing bolt 317.

At this time, the guide roller 313 is mounted to the V rail 713 formed on the side of the rail.

As shown in Figure 5 and 7, the guide roller body 312 is fixed to the clamping portion body 115 by the body fixing bolt 316, the rotation axis of the guide roller body 312 (roller angle Adjustment) It is preferable to install the bearing 311 to be able to rotate smoothly.

In addition, as shown in FIG. 7, the body fixing bolt 316 and the bracket fixing bolt 111 are connected by a spring 318 such that the guide roller body 312 moves only within a predetermined angle.

The clamping part 110 has a clamping part body 115 having a hole in which the roller part 310 is mounted on the lower part and a spring 114 is mounted on the upper part, and a pressure penetrating the hole and the spring 114. On the side of the rod 116, an eccentric cam 122 having a center of rotation 121 at right angles to the axial direction of the pressure rod 116, and the pressure rod 116 is attached to the upper portion of the cam 122 It is configured to include a handle 117 for adhering back and forth in the axial direction of the pressure rod 116 to the roller portion 310 in close contact with the side of the rail (712).

As shown in FIGS. 2 and 3, the clamping part 110 advances the clamping part body 115 back and forth according to the movement of the handle 117, and the roller part 310 installed in the clamping part body 115. Is a part to be mounted on or removed from the rail 712.

As shown in FIG. 2 and FIG. 3, the clamping part 110 includes a clamping part body 115, a pressure rod 116 penetrating the clamping part body 115, and the pressure bar 116. A handle 117 attached to an upper portion of the cam 122 connected to the cam 122 and adhering the pressing rod 116 back and forth in the axial direction to closely contact the roller portion 310 to the side of the rail 712. It is configured to include.

The clamping body 115 is a U-shape formed with a pair of holes through which the pressure bar 116 penetrates at the top, and a pair of bearings 113 have a bracket 112 and a bracket fixing bolt 111 at the bottom thereof. It is fixedly installed by.

The pressure rod 116 is a rod-shaped rod formed with a long hole 125 through which the position bolt 123 penetrates at the side of the clamping portion 115, one end of which is pressed to press the roller portion 310, the other end Is open and the pressure bolt 118, the spacer 119, the pressure tannery bolt 120 is coupled.

The pressure bolt 118, the spacer 119 and the pressure tannery bolt 120 pressurizes the position moving bolt 123 that penetrates the long hole 125 and is coupled to the cam 122, and thus, the handle 117 of the handle 117. The movement is reliably transmitted to the pressure rod 116.

The cam 122 is formed on the side of the rotation center 121 is eccentrically coupled to the position movement bolt 123, the coupling hole is coupled to the handle 117 to the surface perpendicular to the rotation center 121 ( 124 is formed.

A handle 117 is coupled to the coupling hole 124 to move the cam 122.

As shown in FIG. 3, when the handle 117 is moved to the left side of the cam 122, the roller part 310 is moved to the left side by the cam 122. The guide roller 313 is fixed to the rail 712.

As shown in FIGS. 14 and 16, the pressing part 510 is located between the outer circumferential surface of the pipe and the inner circumferential surface of the rail 712 so that the diameter of the pipe of the rail 712 is not uniform and thus out-of- Even if it is necessary to correct the roundness, the rail 712 is securely fixed to the pipe.

As shown in FIG. 13, the pressing unit 510 is installed close to the pressing plate 514 and one end of the pressing plate 514, passes through two shaft supports 516, and the rail 712. The rotary shaft 517, which is a center of relative movement between the pressure plates 514, is installed closer to the one end of the pressure plate 514 than the rotation shaft 517, and the pressure plate 514 is close to the rail 712. The tension bolt 511 supporting the spring 512 to be pushed out, the pressure rod 515 which is installed at the lower end of the other end of the pressure plate 514 and is in line contact with the circumferential surface of the pipe, and the rail 712 It comprises a gap adjusting bolt 513 penetrating and pressing the upper end of the other end of the pressure plate 514.

The pressing unit 510 is preferably arranged to a plurality of at regular intervals to uniformly press the outer peripheral surface of the pipe (A).

As shown in FIG. 14, the pressing unit 510 having such a configuration pressurizes the pressure plate 514 by tightening the space adjusting bolt 513 so that the pressure rod 515 fixed to the pressure plate 514 is a pipe A. Since the outer circumferential surface of the) is pressed, the guide rail portion 710 is firmly fixed to the pipe (A).

In the state where the gap adjusting bolt 513 is not tightened, the folded state is always maintained.

Next, in the orbital pipe automatic welding device according to the second embodiment of the present invention, the wire feeding part 410 is installed in the automatic welding device of the first embodiment.

When the distance between the carriage body 100 and the wire feeder is 5m or more, the feedability is lowered because the force for pushing the wire from the wire feeder to the carriage body 100 is insufficient.

Therefore, it is desirable to install the wire feeder 410 on the carriage body 100 to smoothly feed the wire by pulling the wire.

As shown in Figure 11 and 12, the wire feed portion 410 is a horseshoe-shaped wire guide roller body 427; Two wire guiders (417, 431) installed in respective holes penetrating the opposite end of the horseshoe-shaped body; Two interlocking spur gears 412 and 425 installed with the guiders 417 and 431 interposed therebetween; Wire guide rollers 416 and 424 respectively installed on the two spur gears 412 and 425; The wire feeder 410 includes a motor 432 for driving one of the two spur gears 425.

The spur gear 412 is preferably formed of mono cast nylon (MC) excellent in mechanical strength and wear resistance.

Next, a method of removing and attaching the automatic welding device to the outer circumferential surface of the pipe A and the operation of the carriage body 100 will be described.

The automatic welding device is removed and mounted on the outer circumferential surface of the pipe as follows.

First, as shown in FIG. 1, a method of removing the carriage body 100 while the carriage body 100 is mounted to the guide rail portion 710 will be described.

As shown in FIG. 3, when the handle 117 is moved to the right side, the guide roller 313 moves to the right side, so that the guide rollers are spaced apart, so that the carriage body 100 is easily removed from the guide rail unit 710. can do.

Next, a method of removing the guide rail portion 710 from the outer peripheral surface of the pipe A will be described.

First, as shown in FIG. 17, the connection cam 613 is rotated and positioned at 180 degrees.

As such, when the connecting cam 613 is positioned at 180 degrees, the rail 712 may be separated by sliding from the position fixing bolt 614.

Then, when the sliding separated rail 712 is raised upward, the guide rail portion 710 can be easily removed from the outer circumferential surface of the pipe (A).

The automatic welding device is mounted on the outer circumferential surface of the pipe A in the reverse order of the removal method.

The carriage body 100 mounted on the guide rail 710 travels along the rail 712 on the outer circumferential surface of the pipe A and welds the connection portion between the pipe and the pipe A with the torch 4. .

The driving of the carriage body 100 and the control of the torch 4 are by a PC or a microcomputer.

As described above, the present invention has been described with reference to specific embodiments, but is not necessarily limited thereto, and modifications and variations may be made without departing from the spirit of the present invention.

1: Track type welding device 2: Fixed part
3: power cable and gas hose adjuster 4: torch
100: carriage body 110: clamping part
111: bracket fixing bolt 112: bracket
113: bearing 114: spring
115: clamping portion body 116: pressure bar
117 knob 118 pressure bolt
119: spacer 120: pressurized tannery bolt
121: center of rotation 122: cam
123: position moving bolt 124: coupling hole
125: long hole 210: driving part
211: bearing 212: driving part fixing bolt
213: pinion 214: driving body
215: spring 216: reducer integrated motor
310: roller portion 311: (roller angle adjustment) bearing
312: guide roller body 313: guide roller
314: bearing 315: stop ring
316: body fixing bolt 317: roller fixing bolt
318: spring 410: wire feeder
411: motor case 412: spur gear_B
413: stop ring 414: spur gear bracket
415: Pressing ring 416: Wire guide roller _B
417: Wire guider_B 418: Insulation ring_B
419: Gear Shaft 420: Key_B
421: Roller cover 422: Insulation ring_A
423: Bearing 424: Wire Guide Roller_A
425: Spur Gear_A 426: Key_A
427: wire guide roller body 428: lever fixing pin
429: lever 430: retaining ring
431: Wire guider _A 432: (wire feed) motor
510: pressure unit 511: tension bolt
512: spring 513: spacing adjustment bolt
514: pressure plate 515: pressure bar
516: shaft support 517: rotating shaft
610: connection 611: stop ring
612: fixed block 613: connecting cam
614: position fixing bolt 615: connection block fixing bolt
710: guide rail portion 711: rack
712: rail 713: V rail
A: Pipe

Claims (5)

A guide rail portion 710 mounted on a pipe circumference and having a rack 711, a rail 712, and a connection portion 610;
Pressure plate 514; and
A rotation shaft 517 installed near one end of the pressure plate 514 and penetrating through two shaft supports 516 and serving as a center of relative movement between the guide rail portion 710 and the pressure plate 514; and
A tension bolt 511 installed at one end of the pressure plate 514 to be closer to the rotary shaft 517, and supporting a spring 512 to push the pressure plate 514 closer to the rail 712.
A pressure rod 515 installed at a lower end of the other end of the pressure plate 514 to be in line contact with the circumferential surface of the pipe; And
And a gap adjusting bolt 513 penetrating the rail 712 and pressing the upper end of the other end of the pressure plate 514.
Pressing unit 510 for maintaining and correcting the distance and roundness of the guide rail portion 710 with respect to the circumference;
A driving unit 210 of the carriage body 100 moving along the guide rail unit 710;
A guide roller 313 rotating along a side of the rail 712;
A guide roller body 312 having a rotation axis orthogonal to the rotation axis of the guide roller 313, the angle of which is automatically changed along the curvature of the guide rail portion 710; And
A roller 310 comprising; and a spring 318 for preventing the unbound rotation of the guide roller body 312 to move within a predetermined angle.
A clamping part body 115 having the roller part 310 mounted on the lower part and having a hole on which the spring 114 is mounted;
An eccentric cam 122 having a center of rotation 121 perpendicular to an axial direction of the pressure rod 116 on a side of the pressure rod 116 penetrating the hole and the spring 114; And
A handle 117 attached to an upper portion of the cam 122 and advancing the pressing rod 116 back and forth in the axial direction of the pressing rod 116 to bring the roller portion 310 into close contact with the side surface of the guide rail. Orbital pipe welding device comprising a clamping portion (110). The method of claim 1,
The driving unit 210 is
A running body 214;
A reducer integrated motor 216 mounted to the traveling body 214;
A pinion 213 directly connected to the speed reducer that travels along the rack 711 of the guide rail portion 710; And
And a bolt (212) passing through the spring (215) inserted into the four corner holes of the driving body (214) and coupled to the lower portion of the carriage body (100). delete The method of claim 1,
The connecting portion 610 of the guide rail portion
A fixed block 612 having holes for connecting lower portions of the seams of the rails 712 surrounding the circumferential surfaces of the pipes at regular intervals;
A connection block fixing bolt 615 through which a hole formed at one end of the fixed block 612 and a hole formed at one end of the rail 712 are connected to each other;
A position fixing bolt 614 fixed to a hole formed at the center of the fixing block 612 and tightened so as not to cause a step difference between two end portions of the rail 712 in contact with each other; And
It is installed in the hole formed at the other end of the fixed block 612, the connection cam 613 for projecting to the hole formed at the other end of the corresponding rail 712 to couple the fixed block and the rail by rotation; Orbital pipe welding device, characterized in that. The method of claim 1,
Horseshoe wire guide roller body 427;
Two wire guiders 431 installed in respective holes penetrating the end portions of the body facing the horseshoe;
Two interlocking spur gears 412 provided with the guider therebetween;
Wire guide rollers 416 respectively installed on the two spur gears 412; And
Orbital pipe welding device characterized in that it further comprises a wire feed unit (410) comprising a motor (432) for driving one of the two spur gears.

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