KR100739104B1 - Automatic tig-welding device and its welding method for constructing on field - Google Patents

Abstract

An equipment and a method for automatic tig welding at a construction field are provided to improve weldability by performing butt welding of steel pipes using a TIG(tungsten inert gas) welding machine, thereby welding steel pipe joints more accurately, are provided. A method for automatic tig welding at a construction field comprises the steps of: chamfering joints of both steel pipes to perform V-type butt welding of the steel pipe joints; shaping the chamfered steel pipes using a steel pipe shaping and joining equipment, and aligning the shaped steel pipes side by side to perform butt welding of the steel pipes; adjusting a minute step height between the steel pipes aligned side by side by using a steel pipe-shaping and joining equipment including minute adjusting bolts that are installed on ends of piston rods of shaping cylinders and contact outer surfaces of the steel pipes, and rotating the minute adjusting bolts; performing tack welding on several spots on a butt portion of the steel pipes when the step height between the steel pipes is adjusted; and performing butt welding on joints of the steel pipes using a butt welding equipment, wherein the butt welding is conducted such that a welding current provided to a welding torch is downed step by step in the respective sections when performing the welding along a weldment in a state that a welding section is divided into a plurality of sections along the circumference of the steel pipes.

Description

Automatic TIG-welding device and its welding method for constructing on field}

1 is a perspective view showing a state in which a prior art steel pipe shaping device is mounted on a backhoe;

Figure 2 is a front view showing the internal structure of the prior art steel pipe shaping device,

3 is a side view showing a welding state in which a welding robot is added to a steel pipe orthopedic joint of the prior art;

4 is a front view of a state in which a welding robot is added to a steel pipe shaping device of the prior art,

5 is a perspective view showing a TIG (TIG) automatic welding device of the field construction according to the present invention,

Figure 6 is a side view of the TIG (TIG) automatic welding device of the field construction according to the present invention, a view showing a steel pipe welding state,

7 is a front configuration diagram of the TIG (TIG) automatic welding device of the field construction according to the present invention, showing the state before the steel pipe gripping,

8 is a front configuration diagram of the TIG (TIG) automatic welding device of the field construction according to the present invention, a view showing a state holding the steel pipe gripping,

9 is a perspective view showing a welding robot of the TIG (TIG) automatic welding device of the field construction according to the present invention,

10 is a front view showing a welding robot of the TIG (TIG) automatic welding device of the field construction according to the present invention,

11 is a cross-sectional view showing a welding robot running structure of the TIG (TIG) automatic welding device of the field construction according to the present invention,

12 is a front view showing a steel pipe shaping device used in the present invention, a state diagram before the steel pipe gripping,

13 is a front view showing a steel pipe shaping device used in the present invention, a state in which steel pipe gripping,

14 is a side view showing a steel pipe shaping device used in the present invention,

15 is a flowchart showing a steel pipe welding method using a TIG welding method according to the present invention;

16A to 16G are schematic flowcharts illustrating a method for welding a steel pipe using a TIG welding method according to the present invention.

<Explanation of symbols for main parts of the drawings>

50: circular body 55: upper body

56, 57: quarter-shaped body 60: connecting device

70: switchgear 80: lock

90: shaping device 100: shaping device

100A, 100B: Molding Machine 125: Molding Device

125A: orthopedic adjustment mechanism 125B: support plate

126: shaped cylinder 128: fine adjustment bolt

130: towing device 135: switchgear

140: connecting device 150: locking device

210: welding running portion 211: rail plate

215: running rail 220: welding robot

222: welding torch 223: welding wire

225: contact sensor 230: driving drive unit

240: vertical horizontal adjustment unit 250: hanger base

260: sensor mounting control unit 270: torch mounting control unit

300: welding apparatus 500: beveler

The present invention relates to a welding apparatus used for the external welding when connecting the steel pipe, in particular to weld the steel pipe butt welded by using a Tungsten inert gas welding (TIG) welder to improve the weldability more precisely It relates to a TIG (TIG) automatic welding device and method of the field construction.

Applicant developed the technology to maximize the durability of piping system by securing the workability, economical efficiency and safety and improving the quality of welded joints by automatically performing piping and welding when constructing large steel pipes in all site conditions such as general soil section or temporary facility section. Continues.

In this regard, the present applicant, based on the results of such research and development, "the construction method of steel pipe" (Patent No. 10-0440555), the "formation device of steel pipe" (Patent No. 10-0440185), "formation fitting of steel pipe" ( Patent No. 10-0598551) has been applied for a patent from the Korean Intellectual Property Office.

1 to 4 is a view disclosed in Patent No. 10-0598551 of the above patent invention, with reference to this briefly about the orthopedic device of the steel pipe as follows.

1 to 4 is a view disclosed in Patent No. 10-0598551 of the above patent invention, Figure 1 is a view showing a state in which the orthopedic device is suspended in the backhoe, Figure 2 is a front view of the orthopedic device, Figure 3 is a side view showing a state of welding the outer surface of the mutually coupled steel pipe by installing a welding robot on the side of the orthopedic joint, Figure 4 is also a front view showing a state of welding the outer surface of the steel pipe.

Referring to this briefly look at the orthopedic device of the steel pipe of the patent invention as follows.

FIG. 1 shows a state in which an orthopedic joint of a steel pipe is connected to a working arm R of a backhoe BH and transferred to a steel pipe to be constructed.

The orthopedic device of such a steel pipe, while holding the both ends of the steel pipe (P) to be connected to form the end of the steel pipe to a predetermined roundness, and inserting both steel pipes and then welded as shown in Figs. It is a device made to be welded using the robot (30).

In other words, the forming device of the steel pipe, as shown in FIG. 3, the two forming machines 10 are arranged side by side, it is configured to be connected to each other through the connecting device 40 and the traction device 20.

Each shaper 10 is formed to form a circular structure when closed, as shown in Figure 2 is provided with a semi-circular body (11a) at the top, a pair of quarter-shaped body (11b) at the bottom, The pair of quarter-shaped bodies 11b are connected to the lower portion of the semi-circular body 11a by a hinge 13 to be opened and closed when coupled and separated around the steel pipe.

The opening and closing operation of the quarter-shaped body 11b is performed by the opening-closing cylinder 14 connecting between the semi-circular body 11a and the quarter-shaped body 11b.

In addition, the locking device 15 is provided at a portion where both the quarter-shaped bodies 11b abut each other so that the forming machine 10 does not open in a closed state in a circular structure.

As shown in FIG. 1, the connecting device 40 is configured to be connected to a working arm R such as a crane or a backhoe BH, as shown in FIG. 1.

The two forming machines 10 have a plurality of forming devices 16 in which a cylinder is operated in a radial direction so as to shape the roundness of both steel pipes while holding both steel pipes P to be connected as shown in FIG. 4. A plurality is provided for each interval.

In addition, the traction device 20 between the two forming machines 10 to pull the other forming machine 10 in the state in which the fixing machine 10 is fixed as shown in FIGS. 1 and 3 so that the relative steel pipe is inserted into the other steel pipe. Is provided.

In particular, the shaper 10 is provided with a welding robot 30 for welding the outer surface of the connection portion of the steel pipes coupled to each other as shown in FIG.

The welding robot 30 is made to weld the outer surface of the steel pipe through the welder 33 while moving around the steel pipe along the running rail 32 provided on the side of one molding machine 10.

However, the welding robot 30 of the patent invention as described above is not only difficult to weld while precisely moving the welding torch in the horizontal and vertical directions, but also has a problem in that the positioning of the welding torch and the contact sensor is not easy.

In particular, the common CO ₂ gas arc welding method is mainly as a welding method that is applied in the cue ball joint structure of a steel pipe, when joining the steel pipe to a butt welding method is the higher welding performance and weld quality are required for the common CO ₂ gas arc welding method Has a problem with limitations.

On the other hand, since the welding robot 30 and the like is configured to be mounted on the orthopedic device, the overall structure of the equipment is complicated, and there is a problem in that the speed and reliability of welding work are limited.

The present invention has been made in order to solve the above problems, by configuring a welding robot to enable TIG welding so that the steel pipe can be joined by a V-type butt welding method, and configured to perform butt welding It is an object of the present invention to provide a TIG automatic welding apparatus and method for on-site construction, in which the weld bead of the steel pipe welding joint is beautiful and the welding quality can be improved.

In addition, the present invention is configured to weld while welding the welding torch and the welding wire at the same time, and also configured to automatically adjust the welding gap by using the arc sensor, the field construction can improve the welding quality of the steel pipe (TIG) Another object is to provide an automatic welding apparatus and method.

Another object of the present invention is to provide a TIG automatic welding device for on-site construction which can improve productivity and constructability by increasing welding speed and reliability by separately configuring a welding device from an orthopedic device. .

TIG (TIG) automatic welding method of the field construction according to the present invention for realizing the above object, the step of chamfering the joints of both steel pipes to enable the V-butt welding; Shaping both steel pipes chamfered in the above by using a steel pipe shaping device and aligning them side by side to allow butt welding; Use a steel pipe orthopedic fitting device in which a fine adjustment bolt is installed in contact with the outer surface of the steel pipe at the end of the piston rod of the orthopedic cylinder, and rotates the fine adjustment bolt to adjust the fine step between the two steel pipes arranged side by side in the step. Steps; When the step between the two steel pipes is adjusted in the step, performing welding on several places of the butted portions of both steel pipes; It characterized in that it comprises a step of performing a butt welding using the butt welding device of the steel pipe to the joint of the two steel pipes after the soluble welding.

Here, in the step of performing the butt welding, the welding torch and the welding wire may be welded to the joint of the steel pipe while the weaving operation is performed at the same time.

In the step of performing the butt welding, the interval between the welding torch and the welding portion is preferably welded while maintaining a constant interval using the arc sensor method.

In the step of butt welding, welding may be performed in a plurality of passes around the connection portion of the steel pipe, but all passes may be performed by TIG welding.

In the step of butt welding, welding is performed in a plurality of passes around the connection portion of the steel pipe, but the first pass is performed by TIG welding, and the second pass is other than the TIG welding. It is also possible to perform welding by the method.

On the other hand, in the butt welding step, when welding along the weld in a state in which the welding section is divided into a plurality of sections along the circumference of the steel pipe, the welding current provided to the welding torch for each section is stepped down to perform the welding It is desirable to.

Next, the TIG (TIG) automatic welding device of the field construction according to the present invention for realizing the above object, a circular body having a circular structure at the time of closing so as to be coupled to the circumference of the steel pipe, and one side of the circular body In the welding device of a steel pipe including a welding running portion protruding in a circular ring structure in the welding, and a welding robot mounted on the welding running portion to weld the steel pipe, the welding robot moves along the welding running portion, the circular body A traveling drive unit for connecting the welding robot to a side, a vertical horizontal adjusting unit installed to be supported to the traveling driving unit to adjust a horizontal and vertical position of the welding robot, and a welding torch connected to the vertical horizontal adjusting unit A hanger base supporting a welding wire, a contact sensor, and one side of the hanger base connected to the It is characterized in that it comprises a sensor mounting control unit for supporting the sensor, and a torch mounting control unit connected to the other side of the hanger base to support the welding torch and the welding wire, and to simultaneously weaving the welding torch and the welding wire. .

The sensor mounting control unit is a vertical rod that is fixed in the vertical direction to the hanger base, a horizontal bracket which is installed on the vertical rods and the height can be adjusted and the position of the rotation direction to adjust the rotation direction, and vertical and horizontal directions And a horizontal adjustment knob configured to be capable of adjusting the length thereof, the horizontal adjustment knob being coupled to the control rod in a horizontal direction and having an end portion fixed to the horizontal bracket to enable a horizontal position adjustment of the contact sensor. A vertical adjustment knob coupled to the base in a vertical direction to adjust the position of the contact sensor in a vertical direction, a horizontal connecting rod connected to the end of the vertical adjusting knob in a horizontal direction, and an angle adjustment to the horizontal connecting rod Includes sensor clamps that are connected to each other to secure contact sensors It is preferable.

The torch mounting adjusting unit includes a support plate installed in the vertical direction to the hanger base, a weaving drive unit installed at a rear side of the support plate to support the weaving operation of the welding torch, and from the inside of the support plate. It is preferably configured to include a torch clamp connected to the weaving drive unit for fixing the welding torch.

Between the weaving drive unit and the torch clamp is provided with an inclination adjustment bracket formed with a slot in the circumferential direction to adjust the welding angle of the welding torch, by welding the welding torch by fixing the position along the slot by the screw assembly method It is preferable to be configured to adjust the angle.

The inclination adjustment bracket is provided with a wire support bracket that extends in a state where the tip is fixed, and a wire holder connected to the end of the wire support bracket so that position adjustment is possible and to which the welding wire is mounted, the length of the welding wire It is preferable that it is comprised so that position adjustment of a direction and a rotation direction is possible.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

For reference, the TIG (TIG) automatic welding device of the field construction according to the present invention, the equipment for butt welding small diameter steel pipes with a diameter of about 500mm used in the waste transport pipeline. Such a device of the present invention is not necessarily applied only to small diameter steel pipes, as a general steel pipe joint equipment, of course, can be widely applied.

In addition, the steel pipe to which the apparatus of the present invention is used has a structure (CP) chamfered by a beveler or the like so that the parts to be joined to each other can be butt welded, as shown in FIG. Steel pipe outer surface of the coating (C) can be made.

The apparatus of the present invention used to weld and connect such steel pipes will be described in detail with reference to the accompanying drawings.

5 is a perspective view showing a TIG (TIG) automatic welding device of the field construction according to the present invention.

As shown, the TIG (TIG) automatic welding device of the field construction according to the present invention is provided with a circular body 50 having a circular structure to be coupled around the steel pipe (P). The circular body consists of a semi-circular upper body 55 and quarter-shaped bodies 56 and 57 which are coupled to both of the upper body 55.

Between the upper body 55 and both quarter-type body (56, 57) is provided with an opening and closing device for adjusting the opening and closing state of the quarter-type body (56, 57), both the quarter-type body (56, The part where 57) abuts on each other is provided with the locking device 80 which prevents it from unfolding in the state which grasped the steel pipe.

The circular body 50 is provided with an orthopedic device 90 so that the device of the present invention can be fixed around the steel pipe while adjusting the roundness of the steel pipe while the steel pipe is in close contact with the surface.

In particular, the circular body 50 is configured with an automatic welding part 200, the automatic welding part 200 is provided with a welding running portion 210 protruding in a circular ring structure on one side of the circular body 50 and The welding travel part 210 is configured to be equipped with a welding robot 220 for welding the outer surface of the steel pipe while moving along the circumference of the steel pipe.

Referring to Figures 5 to 8 with respect to the main components of the TIG (TIG) automatic welding device of the field construction of the present invention having such a configuration as follows.

5 is a perspective view schematically showing the entire apparatus of the present invention as described above, FIG. 6 is a side internal configuration diagram of the apparatus according to the present invention, and FIGS. 7 and 8 are front configuration diagrams of the apparatus according to the present invention. 7 is a state diagram before gripping a steel pipe, and FIG. 8 is a state diagram holding a steel pipe.

First, the circular body 50 is configured to have a circular structure when closing to grip the circumference of the steel pipe (P).

As shown in FIG. 6, the circular body 50 is provided with various devices necessary for constituting the device between the two ring-shaped plates 51 and 52 as a whole, and a connecting member 53 is provided between the two plates 51 and 52. It is provided so that the interval maintenance and mutual fixing are made.

In particular, the circular body 50 is configured to be rotatably connected to both upper ends of the upper body 55 having a semi-circular structure, and to both ends of the upper body 55, as shown in FIG. A quarter-shaped body (56, 57).

That is, the upper body 55 is divided into a size of about 1/2 in a circular structure, the quarter-shaped body (56, 57) is divided into a size of approximately 1/4, to be assembled together to hold the circumference of the steel pipe It will form a circular structure.

Next, the upper side of the upper body 55 is provided with a connecting device 60 to lift or move the device of the present invention using equipment such as a backhoe (BH) or a crane as shown in FIG.

As for the connecting device 60, as shown in FIG. 6, connecting plates 61 are fixed to both sides of the ring-shaped plates 51 and 52, respectively, and connecting shafts 62 are installed between the two connecting plates 61. The connecting ring 63 which can connect a chain etc. to this connecting shaft 62 is comprised. Of course, the connection ring 63 is preferably installed so as to rotate freely to some extent from the connection shaft (62).

Next, when coupling the device of the present invention to the circumference of the steel pipe (P) between the connecting portion of the upper body 55 and the quarter-shaped body (56, 57), the quarter-shaped body (56, 57) in the open state A switchgear 70 is provided for re-collecting.

The opening and closing device 70 is composed of a hydraulic cylinder (71), it is provided on both of the quarter-shaped body (56, 57), respectively. Of course, hinges 58 and 59 are provided at the connection portions of the upper body 55 and the quarter-shaped bodies 56 and 57, respectively.

Next, the mutually opposite ends of the both quarter-shaped body (56, 57), when coupled to the circumference to the steel pipe, the locking device 80 is configured to prevent the opening.

Preferably, the locking device 80 is configured to be locked by hydraulic pressure. Referring to FIG. 7, both locking parts 56a and 57a of the two quarter-shaped bodies 56 and 57 are overlapped with each other. The rod 82 of the lock cylinder 81 installed in the center in the state protrudes to both sides and is configured to lock while penetrating the both lock portions 56a and 57a, respectively.

Next, a plurality of orthopedic devices 90 for adjusting the roundness of the steel pipe P between both ring-shaped plates 51 and 52 in the circular body 50 and stably fixing the device of the present invention around the steel pipe. Is composed.

The shaping device 90 is preferably a plurality of the circular body 50 is installed at regular intervals, in the embodiment of the present invention illustrates a structure in which four are installed.

That is, two orthopedic devices 90 are installed on the upper body 55, one each of the quarter-shaped bodies 56 and 57, and each configuration of the orthopedic cylinders 91 fixed to the circular body 50. And a shaping plate 93 which is connected to the shaping cylinder and is in close contact with the outer surface of the steel pipe P while linearly moving.

In particular, since the welding device according to the present invention is used for small diameter butt welding, the shaping device 90 is provided with a uniform vertical pressure around the steel pipe P, while the butt joint is twisted due to heat deformation during welding. It is configured to prevent the occurrence. In addition, even when coated on the outer surface of the steel pipe (P) is configured to be in close contact so as not to damage the coating (C).

The shaping device 90 is formed such that the shaping plate 93 in close contact with the outer surface of the steel pipe has a sufficient area so as to protrude further out of the circular body 50, as shown in Figure 6 to uniformly contact the steel pipe, this shaping plate In the 93, a plurality of buffer pads 95 are provided at regular intervals so as to smoothly contact the outer surface of the steel pipe. In the drawing of this embodiment, three buffer pads 95 are configured in one shaping plate 93.

Of course, the buffer pad 95 may be provided over the entire surface of the shaping plate 93, and the material of the pad may be a silicon material or a fiber material used for belts.

Meanwhile, reference numeral 65 in FIGS. 6 to 8 shows a storage plate extended in a curved plate structure so that the device of the present invention can be stored more stably when stored in a specific place.

In addition, reference numeral 99 denotes solenoid valves including the above-described cylinder 91, which regulates the hydraulic pressure to the opening and closing cylinder 71, the locking cylinder 81 and the like. These solenoid valves 99 may be installed between both plates at the top of the circular body 50.

Next, the device of the present invention configured as described above, the connection device 60, the opening and closing device 70, the locking device 80, the shaping device 90 and the like is configured in the circular body 50, such a basic configuration The automatic welding part 200 is configured to perform automatic TIG (Tungsten inert gas welding) butt welding on the outer surface of the steel pipe (P).

The automatic welding part 200 is mounted on the welding running part 210 and the welding running part 210 which protrude in a circular ring structure from one side of the circular body 50 as shown in FIGS. 5 and 6. While being made of a welding robot 220 for welding the outer surface of the steel pipe.

The welding running portion 210 is provided on one side of the circular body 50 to protrude in a ring-shaped structure and the inner surface of the rail plate 211 is provided on the welding robot 220 Accordingly, the driving rail 215 is configured to be movable.

Here, the rail plate 211 and the running rail 215 are divided into the upper body 55 and the quarter-shaped bodies 56 and 57 in the circular body 50, and the running rail 215 is It is installed in a state spaced apart from the inner surface of the rail plate by a rail support 213 installed on the rail plate 211, the inner peripheral surface of the linear member having a gear structure for smooth movement of the welding robot 220 It is preferable that it consists of.

The traveling structure of the welding robot 220 moving along the welding travel unit 210 will be described in detail with reference to FIG. 11.

First, the configuration of the welding robot 220 will be described in detail with reference to FIGS. 9 to 11.

9 is a perspective view of the welding robot, FIG. 10 is a front view of the welding robot, and FIG. 11 is a schematic cross-sectional view of the welding robot driving structure.

As shown in the drawing, the welding robot 220 is supported by the driving driver 230 and the driving driver 230 that connect the welding robot 220 to the circular body 50 while moving along the traveling rail 215. TIG welding torch, which will be described later by being connected to the vertical horizontal adjusting unit 240 and the vertical horizontal adjusting unit 240 so as to be installed to adjust the horizontal and vertical positions of the welding robot 220. 222, a welding wire 223, a hanger base 250 supporting the contact sensor 225, and a sensor mounting control unit connected to one side of the hanger base 250 to support the contact sensor 225. 260 and a torch mounting control unit 270 connected to the other side of the hanger base 250 to support the welding torch 222 and the welding wire 223.

The vertical horizontal adjustment unit 240 is provided with a control box 217 to receive an external signal to control the welding robot 220 of the present invention.

Each major component of this welding robot 220 will be described in detail.

Before describing the driving driver 230, the installation structure of the traveling rail 215 provided in the rail plate 211 will be described with reference to FIG. 11 and the like. As described above, the rail support 213 is installed to be spaced apart from the rail plate 211 by a predetermined interval.

The traveling rail 215 is installed to be fixed to the rail plate 211 by a rail fixing bolt (not shown).

In particular, the traveling rail 215 is formed in a long linear structure, the roller coupling portion 215a is formed to protrude so that the traveling roller 233 to be described later on both sides thereof, the inner side of the driving gear ( The gear teeth 215b of the rack structure are formed to engage the 237.

Now, the driving driver 230 of the welding robot 220 will be described. The driving base 231 may form a body of the driving unit and the vertical horizontal adjusting unit 240 may be connected to the driving base 231. A traveling roller 233 installed to be coupled to the roller engaging portion 215a of the traveling rail 215, a traveling motor 235 installed at one side of the traveling base 231 to generate a driving force, and the traveling It is composed of a drive gear 237 installed on the base 231 to be engaged with the gear teeth 215a of the travel rail 215 to move the welding robot 220 while rotating by the driving force of the travel motor 235. .

The driving base 231 is provided with a worm reducer or the like for power reduction and power transmission transmitted from the driving motor 235 to the driving gear 237.

Four traveling rollers 233 are provided in the front and the rear in a moving direction of the traveling base 231, and a pair of four are coupled to both sides of the traveling rail 215 to maintain a more stable support state.

The traveling motor 235 is preferably configured as a stepping motor rather than a DC motor.

 The drive gear 237 is configured to engage with the rack and pinion structure on the travel rail 215 to enable the driving.

Next, referring to FIGS. 9 and 10, the vertical horizontal adjustment unit 240 is connected to the upper portion of the connection bracket 232 fixed to the driving base 231 of the driving driver 230 in a horizontal direction and connects the connection bracket. A horizontal guide 241 moving in a horizontal direction with respect to 232, and fixed to the horizontal guide 241 in a vertical direction and connected to the hanger base 250 so that the hanger base 250 is moved in the vertical direction. It consists of a vertical guide 245 for guiding.

Herein, the horizontal guide 241 and the vertical guide 245 are provided with a driving unit for allowing the horizontal guide 241 and the hanger base 250 to move horizontally and vertically. A transfer mechanism is used. One example thereof is a ball screw or the like which enables linear movement of the connecting component by the driving force of the motor.

Preferably, the control box 217 is installed above the horizontal guide 241 to control the welding robot 220.

Next, the hanger base 250 is a vertical plate 251 which is connected to the vertical guide 245 in a straight line to move in a vertical direction, and the joint portion 253 to be able to adjust the vertical plate 251 in the vertical direction Is connected through the sensor mounting control unit 260 and the torch mounting control unit 270 is made of a horizontal plate 255 to be connected and installed.

Here, the joint portion 253 is preferably configured such that the horizontal plate 255 can be rotated relative to the vertical plate 251.

The joint part 252 and the rotation control structure may be configured to be automatically adjusted, but in this embodiment, when the welding robot 220 is initially set, the positions of the welding torch 222 and the contact sensor 225 are adjusted. The configuration that can be adjusted in the position adjusted, and adjusting the position through an adjustment bolt or the like to properly adjust has been illustrated.

Next, the sensor mounting control unit 260 is a vertical rod 261 which is fixed in a vertical direction to the horizontal plate 255 of the hanger base 250, and is installed on the vertical rod 261, and the height can be adjusted In addition, the horizontal bracket 262 is installed on the vertical rod 261 so that the position of the rotation direction can be adjusted, the adjuster 263 is configured to be able to adjust the length in the vertical and horizontal directions, and horizontal to the adjuster 263 And a horizontal adjustment knob 264 coupled to the horizontal bracket 262 so that its end is fixed to the horizontal bracket 262 so that the position of the contact sensor 225 can be adjusted in the horizontal direction, and perpendicular to the control unit 263. And coupled to the vertical adjustment knob 265 is made to enable the position adjustment of the vertical direction of the contact sensor 225, and the horizontal connection 266 connected in the horizontal direction to the end of the vertical adjustment knob 265 and , This horizontal connecting rod (266) It is connected to enable the angle adjustment consists of a sensor clamp 267 is fixed to the contact-type sensor 225.

In this case, the contact sensor 225 is a sensor that normally contacts a specific object and detects a change in its position. As shown in the drawing, a sensor probe 225a and a signal transmission box 225b for transmitting a signal of the probe to the outside are provided. It is made, and serves to change the welding position of the welding torch 222 while moving along the portion to be welded on the outer surface of the steel pipe connection.

Of course, in the embodiment of the present invention has been described by illustrating the contact sensor 225, it is also possible to configure using a non-contact sensor 225 capable of tracking the welding position, depending on the conditions.

As described above, the contact sensor 225 includes the vertical bar 261, the horizontal bracket 262, the horizontal adjustment knob 263, the vertical adjustment knob 265, the horizontal connecting rod 267, and the sensor clamp 265. X, Y, Z, ?? Position adjustment in the direction becomes possible. This contact sensor is preferably adjusted to be positioned as close as possible to the welding torch 222.

The result of detecting the contact sensor 225 while contacting the outer surface of the steel pipe is input to the main control unit through the control box 217, etc., and the vertical control unit in the main control unit according to the detection result of the contact sensor 225 The adjustment unit 240 is operated to adjust the welding position of the welding torch 222.

Meanwhile, in the above, the configuration for setting the position of the contact sensor 225 is mainly composed of a manual structure. However, according to an implementation condition, the horizontal adjustment knob 263 and the vertical adjustment knob (with an electric motor) are automatically provided. 265) it is also possible to adjust the position by adjusting the configuration.

Next, the torch mounting control unit 270 is basically configured to be welded while the TIG welding torch 222 and the welding wire 223 are simultaneously weaved.

That is, the torch mounting control unit 270 is installed on the horizontal plate 255 of the hanger base 250 in the vertical direction, and the support plate 279 is installed on the rear of the support plate of the welding torch 222 A weaving drive unit 273 for supporting a weaving operation, and the torch clamp 271 connected to the weaving drive unit inside the support plate 279 to fix and mount the welding torch 222. do.

The welding torch 222 is configured to enable gas-tungsten arc welding, that is, TIG welding, among the arc welding methods, and includes a tungsten electrode in a tubular welding housing, and is inert around the electrode. It is configured to supply a gas (eg, argon gas) to melt and weld the welding wire 223 while generating an arc between the welding rod and the welding portion during welding.

The torch clamp 271 for fixing the welding torch 222 is connected to and supported by the weaving drive unit 273 so as to enable translation by the weaving drive unit 273, and the welding torch 222 is fixed or A torch fixing knob 271a having a screw tightening structure is provided to detach or adjust the protruding length.

In addition, the front side of the torch clamp 271 is provided with an inclination adjustment bracket 272 slotted in the circumferential direction to adjust the welding angle of the welding torch. The inclination adjustment bracket 272 is configured to adjust the welding angle of the welding torch by fixing the position of the torch clamp 271 along the slot 272a by a screw assembly method.

The inclination adjustment bracket 272 is fixed to the weaving drive unit 273 is configured to perform a weaving motion in a set together with the welding torch 222 and the torch clamp 271 during the weaving operation.

The weaving drive unit 273 is a device that drives the welding torch 222 and the welding wire 223 to reciprocate continuously within a predetermined width with respect to the welding direction, and is fixed to the rear of the support plate 279 to weaving driving force. It is composed of a weaving transmitter 275 for transmitting the inclination adjustment bracket 272 or torch clamp 271 to make the weaving operation, and a weaving motor 274 installed in the weaving transmitter to generate a weaving driving force. .

The weaving transmitter 275 is configured to receive the rotational force of the weaving motor 274 so that the welding torch 222 can perform the weaving motion in a direction substantially perpendicular to the welding progress direction, as shown in FIG. 10. The weaving shaft 276 is configured to enable the weaving motion of the welding torch by repeating the forward and reverse rotation.

The welding torch 222 configured in the torch mounting adjusting unit 270 configured as described above moves in the horizontal and vertical directions according to the operation of the vertical horizontal adjusting unit 240, such as the contact sensor 225. .

In addition, when the weaving drive unit 273 is operated, the welding torch 222 is moved while weaving from side to side to the welding portion of the steel pipe (P), it is possible to weaving the outer surface of the steel pipe.

On the other hand, the inclination adjustment bracket 272 is configured to support the welding wire 223, the front end is connected to the inclination adjustment bracket 272 and the wire support bracket 280 extending in the direction of the contact sensor and the , And a wire holder 282 to which the welding wire 223 is mounted is connected to the end of the wire support bracket 280 so that position adjustment is possible.

The wire support bracket 280 is a component for continuously supporting the welding wire 223, that is, the solid wire (SOLID WIRE) to supply the welded portion of the steel pipe, so that the position of the welding wire can be adjusted in various ways The inclination adjustment bracket 272 is configured to be fixed to the block 276a supported by the weaving shaft 276 by using a bolt 272b or the like, a plurality of holes 280a at regular intervals in the longitudinal direction The elongated slot 280b is formed at a portion at which the wire holder 282 is installed, and is configured to allow position adjustment in the longitudinal direction and the rotation direction of the welding wire 223.

In addition, the wire holder 282 is configured to pass through the welding wire 223 therein is configured by screwing the end of the wire support bracket 280.

As described above, the welding torch 222 and the welding wire 223 are connected to the inclination adjustment bracket 272 while being installed in the torch clamp 271 and the wire holder 282, and thus, the welding torch 222. And the welding wire 223 can perform the welding while weaving movement at the same time by the weaving drive unit 273.

Next, the welding apparatus of the present invention is configured to mainly use a TIG welding method, and the gap between the welded portion of the steel pipe and the welding torch 222 is kept constant at all times due to the characteristics of the TIG welding. While the welding proceeds to ensure excellent welding quality.

In the present invention, the arc sensor is used as a method of keeping the gap between the welded portion of the steel pipe and the welding torch constant.

The arc sensor automatically adjusts the gap between the welded portion of the steel pipe and the welding torch 222 by using a change in current and voltage value according to a change in distance between the tip of the welded torch 222 and the welded portion of the steel pipe P. It is configured to be. That is, when the distance between the welding torch 222 and the welding portion is far away, the measured current value is lowered, and when the interval is narrowed, the welding current value is increased.

Therefore, the TIG welding is performed while measuring the distance between the welding torch 222 and the steel pipe welding part by controlling the proper welding interval set through the arc sensor controller (not shown) using this principle.

 Here, the arc sensor controller adjusts the gap between the welding torch 222 and the steel pipe welding part by controlling the operation of the vertical guide 245 of the vertical horizontal adjusting part 240.

On the other hand, since the welding torch 222 is configured by a TIG welding method, a welding machine control box, an inert (argon) gas supply, a welding wire feeder, etc. required for the TIG welding in addition to the arc sensor controller are required. Since the configuration is generally ancillary equipment that is adopted in the TIG welding method, a detailed description thereof will be omitted.

However, the welding machine control box used for the apparatus of this invention can use the control apparatus using the technique of the "welding method and apparatus" disclosed in Unexamined-Japanese-Patent No. 58-128285.

That is, the disclosed invention divides the welding section of the steel pipe (pipe) into a plurality of sections, and when the welding torch is welded via each section, when the welding current provided to the welding torch is configured to increase or decrease step by step Consists of

Therefore, the welding device of the present invention is also a device for welding small-diameter or large-diameter steel pipes by a TIG welding method, and when the welding current and voltage are properly controlled according to the welding section using the control device of the patent invention, Precise and excellent welding quality can be obtained.

Next, prior to describing the TIG (automatic welding) method of the field construction of the present invention, before welding both steel pipes, the steel pipe butt jointing device that can form both steel pipes, and the step can be adjusted in a mutually opposed state. This will be described with reference to 12 to 14.

12 and 13 are front views of the butt joint device for butt joints used in the present invention, Figures 12 and 13 are views showing the state before and after gripping the steel pipe. And Figure 14 is a side view of the orthopedic joint for steel pipe butt according to the present invention.

Orthopedic fitting for steel pipe butt used in the present invention, the two forming machines (100A, 100B) consisting of the circular body (111, 112) as shown in Figure 14 so as to form the steel pipe (P), respectively, will be described below It is configured to be connected in one set by the traction device 130 and the connecting device 140 to be.

The circular bodies 111 and 112 of each of the forming machines 100A and 100B are coupled to both the upper body 113 and the upper body 113 of a semi-circular structure, as shown in FIGS. Both quarter-shaped bodies 114 and 115 formed are assembled to each other.

Both quarter-shaped bodies 114 and 115 are connected to the upper body 113 through a connecting shaft 137 and rotated to form one circle when the forming machine 100A and 100B is closed as shown in FIG. It is configured to open to both sides as shown in Fig. 12 when opening, such as when inserted around the (P).

Next, when coupled between the upper portion of the body 113 and the connecting portion of the quarter-shaped body (114,115) around the steel pipe (P), the opening and closing cylinder 136 to be gathered again in the open state the quarter-shaped body (114,115) There is provided an opening and closing device 135 is included.

Here, the connecting portion of the upper body 113 and the quarter-shaped bodies 114 and 115 provided with the opening and closing device 135 will be described.

The front and rear plates forming the upper body 113 and both quarter-shaped bodies 114 and 115 are configured to form the same plane. In addition, connecting plates are installed on both outer surfaces of one of the upper bodies 113 and both of the quarter-shaped bodies 114 and 115, respectively, and the connecting plates are formed on the counterpart body (the upper part in the drawing). It is configured to be interconnected to the connecting shaft 137 in a state extending in the direction of the body (113).

This configuration is configured to be suitable for the orthopedic joints of small diameter steel pipes by forming both bodies with the same width without reducing the width of either the upper body 113 or both of the quarter-shaped body (114,115).

In addition, the connecting shaft 137 is installed to be located on the inner circumferential surface side of each of the circular body (111, 112), both plates forming the upper body 113 and the quarter-shaped body (114, 115), the connection shaft 137 as the center The round contact surface 139a is formed to contact the convex and concave structures so that the mutually contacting portions do not interfere with the quarter-shaped bodies 114 and 115 in the rotation operation.

In addition, in the direction of the outer circumferential surface of the circular bodies 111 and 112 at the round contact surface 139a, the distance between the two plates is gradually increased, and when the two quarter-shaped bodies 114 and 115 are opened to both sides, they are mutually contacted. Stopper surface (139b) is provided so as not to open any more.

In addition, the circular bodies 111 and 112 have been removed such that both sides of the outer side of the portion where the upper body 113 and the quarter-shaped bodies 114 and 115 are interconnected so as to minimize the width in the horizontal direction enter the inside more in the circular structure. The deletion portion 139c of the structure is formed.

Next, the plurality of forming apparatuses 125 for adjusting the roundness of the steel pipes P inside the circular bodies 111 and 112 and stably fixing the apparatus of the present invention to the circumferences of the forming machines 100A and 100B. ) Are configured.

In particular, the shaping device 125 is configured to be joined to the butt joint of the small diameter steel pipe, each of the forming machine (100A, 100B) to pull the two steel pipes to the butt, so as to adjust the step that occurs between the two steel pipes Protruding in the inner direction of the circular body (111,112).

The shaping device 125 has a plurality of support plates 125B installed to protrude at regular intervals from the circular bodies 111 and 112 to support lower portions of the steel pipes P, and radial directions from the circular bodies 111 and 112. Orthopedic cylinders 126 that move to the predetermined intervals are installed in contact with the upper portion of the steel pipe is formed of a plurality of shaping adjustment mechanism (125A) for shaping the steel pipe or to adjust the step.

In this case, the support plates 125B are provided on both of the quarter-shaped bodies 114 and 115, respectively, and the shaping adjustment mechanisms 125A are provided on the upper body 113, respectively.

The support plate 125B includes a plate 129 elongated along a length direction of the steel pipe, and is fixedly installed between both plates forming the quarter-shaped bodies 114 and 115. Of course, the protruding height of the support plates 125B is set to be able to adjust the lower roundness and the step of the steel pipe while supporting the lower portion of the steel pipe P when the roundness is adjusted through the orthopedic adjustment mechanism 125A located at the top.

At the end of the support plate 125B, a buffer pad 129a is installed on the surface of the plate 129 that is in contact with the steel pipe. The buffer pad may be made of solid silicone or a fiber material used as a belt material. .

The orthopedic adjustment mechanism 125A is configured to automatically mold both steel pipes first, and then rotate the fine adjustment bolt 128, which will be described later manually, with a tool such as a spanner to finely adjust the step between both steel pipes. .

The shaping adjustment mechanism 125A has a shaping cylinder 126 installed in the upper body 113, and the shaping cylinder 126 is configured such that the piston rod 127 protrudes in a radial direction, that is, in the outer surface direction of the steel pipe. . In particular, the end of the piston rod 127 is provided with a fine adjustment bolt 128 to fine-tune the step between the two steel pipes.

Fine adjustment bolt 128 is mounted in a manner that is screwed to the piston rod 127 is configured such that the head contacts the surface of the steel pipe. Of course, a portion of the head contacting the surface of the steel pipe may be configured by installing a pad 128a, such as a buffer pad 129a, installed on the support plate 125B.

On the other hand, the support plate 125B and the shaping adjustment mechanism 125A as described above are preferably configured to be arranged one by one about 18 degrees around the steel pipe, and thus the support plate 125B and the shaping adjustment mechanism 125A. The reason why they are densely arranged is that the butt welding requires fine adjustment of the entire part so that the step of the butt part of each of the steel pipes P is less than 3 mm.

Next, a traction device 130 is provided between the two molders, that is, both circular bodies 111 and 112, which pulls both steel pipes P together with both molders 100A and 100B as shown in FIG. A device for pulling and connecting one steel pipe such that both steel pipes P are connected to each other in a state in which each steel pipe P is held in contact with each other, and the two steel pipes P having a certain roundness are secured by operating the traction cylinder 131. It is configured to face each other. Of course, on both sides of the traction cylinder 131 is provided with a traction guide rod 132 to connect both circular bodies (111, 112) to each other and to guide linear movement during the traction operation.

Next, a connection device 140 is provided to connect a lifting device such as a crane or a backhoe to the upper portions of both the forming machines 100A and 100B.

The connecting device 140 is composed of a plurality of connecting links (142, 143) so as to be folded and unfolded in accordance with the distance adjustment of the two forming machines (100A, 100B) as in the traction operation, the both forming machines (100A, Is installed between the 100B, consisting of a connecting ring 144 is provided so that the external lifting device can be connected to the central portion of the connection link (142, 143).

Here, the plurality of connection links 142 and 143 are connected to the link brackets 141 fixed to the outer surfaces of both the forming machines 100A and 100B.

Next, the opposite ends of the two quarter-shaped bodies 114 and 115 are configured with a locking device 150 to prevent the interconnection from being released.

The locking device 150 includes a locking cylinder 151 provided in one quarter-shaped body 114, a cam rod 152 for converting the linear movement of the locking cylinder 151 in the vertical direction, and a cam rod. It is composed of both locking pins 155 inserted into both locking holes 117a of the opposite locking plate 117 by being opened to both sides.

The cam rod 152 is formed so that the relatively thick portion is connected in a relatively thin portion, it is configured to move the locking pin 155 while linearly moving according to the operation of the lock cylinder 151. do.

Next, a method for welding a steel pipe using a TIG (TIG) automatic welding device of the field construction according to the present invention configured as described above and a butt joint fitting device of the steel pipe will be described as follows.

15 is a flowchart showing a steel pipe welding method using a TIG welding method according to the present invention, and FIGS. 16A to 16F are schematic views showing a steel pipe welding method using a TIG welding method according to the present invention. Flowcharts.

First, chamfer the joints of both steel pipes to be interconnected (S ₁ ).

In a state where the ends of the steel pipes to be interconnected at right angles, using the chamfering equipment such as beveler 500 as shown in Figure 16a, the ends of each steel pipe (P) to be interconnected to enable V-butt welding It is processed by chamfering (C; champer) about 20 ° ~ 50 °, preferably 30 ° ~ 35 °.

That is, in the state in which the head 510 of the beveler 500 is inserted into the steel pipe P, the plurality of fixing blocks 520 are expanded to fix the equipment to the steel pipe, and thus the bit is centered around the main shaft 530. Chamfering the end of the steel pipe while rotating (540).

For reference, FIG. 16A shows a relatively larger thickness of the steel pipe in order to emphasize chamfering portions than those of the steel pipe butt weld structure.

Next, both the steel pipes (P) to form and align side by side to allow butt welding (S ₂ ).

By using the steel pipe forming apparatus 100 as shown in Figures 12 to 14 to form, pull and align side by side of both steel pipes.

That is, in the state in which the ends of both steel pipes P are gripped by using two forming machines 100A and 100B of the forming apparatus 100 as shown in FIG. 16B, the upper and lower forming machines 125 in FIGS. 12 to 14. Using the to form a round of both steel pipes, as shown in Figure 16c by using a traction device 130 to pull one of the steel pipe toward the other steel pipe to align the two steel pipes to be in a mutual state.

Next, finely adjust the step between the two butt steel pipes (S ₃ ).

That is, the step between the two steel pipes (P) while rotating the fine adjustment bolt 128 of the shaping adjustment mechanism (125A) with a tool such as a spanner, as shown in Figure 16d, while checking the stepped state between the mutually butted steel pipes. Fine tune it.

Therefore, the present invention automatically forms both steel pipes using the orthopedic cylinder 126 of the orthopedic adjustment mechanism 125A, and then precisely using the fine adjustment bolt 128 while checking the step difference between the butted steel pipes. Manual adjustments will be made.

Next, the two steel pipes butt welded parts (S ₄ ).

As shown in Fig. 16E, the temporary welding PW is performed at regular intervals at several locations of the welding site by using a general manual gas welding machine or the like.

Next, TIG automatic welding is performed using the welding device of the present invention as described above at the junction of both steel pipes P (S ₅ ) (S ₆ ).

The orthopedic device 100 is separated from both steel pipes, and the welding device 300 of the present invention is installed as shown in FIG. 16F, and then the welding robot 220 is moved along the outer surface connection portion of the steel pipe. Butt welding is performed using a TIG welding method.

At this time, as described above, the welding is performed in a state in which the gap between the welding torch 222 and the welding part is kept constant using the arc sensor. In addition, while the TIG welding torch 222 and the welding wire 223 are simultaneously weaved, welding of the joint is performed. Of course, weaving may not be performed depending on the welding conditions.

In particular, the present invention, when the welding torch 222 and the welding wire 223 is welded along the weld in a state in which the welding section is divided into a plurality of sections along the circumference of the steel pipe (P) using a welder control box, each section The welding current provided to the welding torch 222 may be welded while being stepped down.

On the other hand, in the process of welding using the welding device 300 of the present invention as described above, the welding is performed in several passes (PASS) so that the weld material is sufficiently filled in the V-shaped groove of the steel pipe connecting portion.

That is, since the welding apparatus 300 of the present invention is applied to the steel pipe of about 500 mm of the steel pipe used, the thickness of the steel pipe is considerably thick, and the V-shaped groove portions of the welded portions that are butted to each other have a considerable depth. Therefore, it is difficult to ensure sufficient joint strength of the welded portion only by welding the steel pipe circumference once, so that welding is performed in several passes.

When welding in several passes in this way, the all-tig (TIG) method (S ₇₁ ) to weld all the passes (TIG), the first pass is a TIG (TIG) welding, the second pass from the other welding method For example, it may be made of a mixed method (S ₇₂ ) that is welded and grown by various welding methods capable of breeding welding such as general gas welding, CO ₂ arc welding, carbon and metal arc welding, MIG welding, and the like.

That is, the all-tig (TIG) method is a method in which all the paths to the TIG (TIG) welding is a method of performing the welding by rotating the welding device of the present invention as described above several times in the steel pipe welding site, the latter In the mixing method of the first pass, the TIG welding is performed by using the welding apparatus of the present invention described above, and then the TIG welding robot is separated, and then CO ₂ welding to the traveling rail 215 is performed. A welding robot capable of welding another part of the wafer is mounted, and further breeding welding is performed on the TIG welded bead portion.

Of course, a welding robot capable of other welding together with the TIG welding robot may be mounted on the traveling rail 215 to continuously weld at a predetermined interval or time.

When the welding (TW) of the steel pipe connecting portion is completed in the above manner, as shown in Fig. 16g, the weld material is filled in the butted portion of both steel pipes P, and then hardened, so that both steel pipes can be interconnected with sufficient bonding strength. do.

The TIG (TIG) automatic welding device and method of the field construction according to the present invention configured and operated as described above, the welding robot is configured to enable TIG (TIG) welding so that the steel pipe can be joined by the V-butt welding method Since the steel pipe is connected by the butt welding method, the weld bead of the steel pipe welding joint is beautiful and the welding quality can be improved, and in particular, the welding strength of the steel pipe connecting portion can be improved.

In addition, the present invention is configured to weld while welding the welding torch and the welding wire at the same time, and also configured to automatically adjust the welding gap by using the arc sensor, because it is configured to weld while lowering the welding current for each welding section, etc. There is an advantage that the weldability and the welding quality of the surface welding portion can also be improved.

In addition, since the present invention is configured separately from the welding device from the orthopedic joint, there is an advantage in that the productivity and workability can be improved by increasing the speed and reliability of the welding operation.

Claims (11)

Chamfering the joints of both steel pipes to enable V-butt welding; Shaping both steel pipes chamfered in the above by using a steel pipe shaping device and aligning them side by side to allow butt welding; Use a steel pipe orthopedic fitting device in which a fine adjustment bolt is installed in contact with the outer surface of the steel pipe at the end of the piston rod of the orthopedic cylinder, and rotates the fine adjustment bolt to adjust the fine step between the two steel pipes arranged side by side in the step. Steps; When the step between the two steel pipes is adjusted in the step, performing welding on several places of the butted portions of both steel pipes; After the weld welding, butt welding is performed using the butt welding device of the steel pipe to the joints of both steel pipes, and when welding along the welding part in the welding section divided into a plurality of sections along the circumference of the steel pipe, each section is welded TIG automatic welding method of the field construction comprising the step of performing the welding while the welding current provided to the torch step by step down. The method according to claim 1, TIG (TIG) automatic welding method of the field construction, characterized in that the welding torch and welding wire at the same time weaving operation in the step of performing the butt welding to weld to the joint of the steel pipe. The method according to claim 1, In the step of performing the butt welding, the interval between the welding torch and the welding portion is welded while maintaining a constant interval using the arc sensor method TIG (TIG) automatic welding method for on-site construction. The method according to claim 1, In the step of performing the butt welding, welding is performed in a plurality of passes around the connection portion of the steel pipe, all of the passes by the TIG (TIG) welding method characterized in that the field construction. The method according to claim 1, In the step of butt welding, welding is performed in a plurality of passes around the connection portion of the steel pipe, but the first pass is a TIG welding, and the second pass is not a TIG welding. TIG (TIG) automatic welding method for on-site construction, characterized in that the welding. delete A circular body having a circular structure at the time of closing so as to be coupled to the circumference of the steel pipe, a welding running portion protruding into a circular ring structure from one side of the circular body, and welding the steel pipe while moving mounted on the welding running portion In the welding device for steel pipes including a welding robot, The welding robot moves along the welding running unit, and a driving unit connecting the welding robot to the circular body side, and is installed to be supported by the driving unit so that the horizontal and vertical directions of the welding robot can be adjusted. An adjustment unit, a hanger base connected to the vertical horizontal adjustment unit to support a welding torch, a welding wire, and a contact sensor; a sensor mounting adjustment unit connected to one side of the hanger base to support the contact sensor; TIG automatic welding device of the field construction characterized in that it is connected to the other side of the hanger base to support the welding torch and the welding wire, and torch weaving operation of the welding torch and the welding wire at the same time. The method according to claim 7, The sensor mounting control unit is a vertical rod that is fixed in the vertical direction to the hanger base, a horizontal bracket which is installed on the vertical rods and the height can be adjusted and the position of the rotation direction to adjust the rotation direction, and vertical and horizontal directions And a horizontal adjustment knob configured to be capable of adjusting the length thereof, the horizontal adjustment knob being coupled to the control rod in a horizontal direction and having an end portion fixed to the horizontal bracket to enable a horizontal position adjustment of the contact sensor. A vertical adjustment knob coupled to the base in a vertical direction to adjust the position of the contact sensor in a vertical direction, a horizontal connecting rod connected to the end of the vertical adjusting knob in a horizontal direction, and an angle adjustment to the horizontal connecting rod Including sensor clamps, which are connected so that they are possible to hold contact sensors TIG (TIG) automatic welding device of field construction to gong. The method according to claim 7, The torch mounting adjusting unit includes a support plate installed in the vertical direction to the hanger base, a weaving drive unit installed at a rear side of the support plate to support the weaving operation of the welding torch, and from the inside of the support plate. TIG (TIG) automatic welding device of the field construction, characterized in that it comprises a torch clamp is connected to the weaving drive unit fixed to the welding torch. The method according to claim 9, Between the weaving drive unit and the torch clamp is provided with an inclination adjustment bracket formed with a slot in the circumferential direction to adjust the welding angle of the welding torch, by welding the welding torch by fixing the position along the slot by the screw assembly method TIG (TIG) automatic welding device of the field construction, characterized in that configured to adjust the angle. The method according to claim 10, The inclination adjustment bracket is provided with a wire support bracket that extends in a state where the tip is fixed, and a wire holder connected to the end of the wire support bracket so that position adjustment is possible and to which the welding wire is mounted, the length of the welding wire TIG (TIG) automatic welding device of the field construction, characterized in that configured to enable the adjustment of the direction and rotation direction.

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