KR20090016296A - Automatic tig welding device for jointing steel pipes - Google Patents

Abstract

An automatic TIG(tungsten inert gas) welding apparatus for joining steel pipes is provided to enable a user to exchange a welding torch easily by rotating the welding torch equipped with a torch clamp backward and forward. An automatic TIG(tungsten inert gas) welding apparatus for joining steel pipes comprises the following units. A main body(50) is opened to hold a steel pipe tightly. A rail supporting board(111) is protruding from a side of the main body in a ring shape. A welding operation unit(110) includes an operating rail(115) installed the inside of the rail supporting board. A carriage is positioned the outside of the rail supporting board and connected to the welding operation unit.

Description

Automatic TIG welding device for jointing steel pipes}

The present invention relates to an automatic welding device for constructing a steel pipe, and in particular, by using a Tungsten inert gas welding (TIG) welding machine, it is possible to weld steel pipes together so that steel pipe joints can be welded more easily and precisely. A TIG automatic welding device for connecting a steel pipe.

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 is a view showing a state in which the orthopedic joint is suspended in the backhoe, Figure 2 is a front view of the orthopedic joint, Figure 3 is a welding robot installed on the side of the orthopedic joint welds the outer surface of the mutually coupled steel pipe 4 is a front view showing a state in which the outer surface of the steel pipe is welded.

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.

Such a steel pipe orthopedic joint is formed by holding both ends of the steel pipes P to be connected to each other, forming end portions of the steel pipes to a predetermined roundness, inserting and connecting both steel pipes, and then welding robots as shown in FIGS. 3 and 4. This equipment is made to weld using (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.

Further, between the two forming machines 10, as shown in FIGS. 1 and 3, a pulling device 20 for pulling the other forming machine 10 in the state in which the fixing machine 10 is fixed to insert the other steel pipe into the other steel pipe is provided. It 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 patent invention as described above, although there is a significant advantage that can automatically connect large steel pipes at the time of water and sewage pipe connection construction, the welding robot 30 and the like is configured in addition to the forming machine 10, more There was a limit to the speedy and accurate construction.

In particular, the welding robot 30 provided in the patent invention is not only easy to replace the welding torch, but also because the sensor, the welding wire, the welding torch, etc. are installed in one direction only in the welding robot, only one-way welding is possible. In addition, bidirectional welding also has a problem that is impossible.

The present invention has been made to solve the above problems, and the welding robot is configured to enable TIG welding so that steel pipes can be joined in a V-butt welding method, and the traveling structure required for such TIG welding is also provided. It is an object of the present invention to provide a TIG automatic welding device for connecting steel pipes, which can improve welding quality by securing stability and precision.

In addition, the present invention is easy to replace the welding torch, the welding direction of the steel pipe can also be selected freely in the forward or reverse direction to weld, TIG automatic welding device for steel pipe connection that can improve the ease of welding There is another purpose to provide.

In addition, another object of the present invention is to provide a steel pipe connection TIG automatic welding device in which a welding wire supply device is mounted on a carrier so that the supply of welding wires can be made smoothly.

Steel pipe connection TIG automatic welding device according to the present invention for realizing the above object is a circular body which is configured to be opened and closed to grip the steel pipe; A welding support portion provided with a rail support plate protruding in a circular ring structure from one side of the circular body and a traveling rail inside the rail support plate; A carriage connected to the traveling rail at a position outside the rail support plate and rotating; It is supported by the carriage and configured to weld the outer surface of the steel pipe, characterized in that it comprises a welder configured to rotate the welding torch and the welding wire in the opposite direction to enable bi-directional welding of the steel pipe.

Here, the carriage is coupled to the traveling rail of the welding running portion moving body portion to move along the traveling rail, a frame portion which is located outside the rail support plate connected to the traveling body portion, the frame portion is provided It comprises a horizontal and vertical adjustment for adjusting the position of the welding machine in the horizontal and vertical direction.

In addition, the frame portion is preferably configured to be equipped with a wire feeding device for providing a welding wire to the welding machine.

The welder includes a support connected to the carriage, a weaving operation unit provided at the support to allow the welding torch to operate, a fixing block connected to the weaving operation unit and installed in a horizontal direction from the side of the fixing block. A rotatable block connected to the rotatable block, a torch clamp rotatably installed on the rotatable block, a torch clamp mounted on the rotatable block, a wire clamp installed on the torch clamp to provide a welding wire, and a contact type provided at both sides of the support stand. It is preferable that the sensor comprises a plurality of sensor mounting module that can be selectively installed.

In this case, the rotation block may be rotatably installed in the front-rear direction with respect to the fixing block so that the welding torch can be easily exchanged.

The sensor mounting module is a cross-shaped adjuster configured to enable the length adjustment to be able to adjust the position of the sensor in the vertical and horizontal direction, and coupled to the adjuster in the horizontal direction and the end is fixed to the support contact sensor A horizontal adjustment knob configured to be able to adjust a horizontal position of the vertical adjustment knob coupled to the control unit in a vertical direction to enable a vertical position adjustment of the touch sensor, and an end of the vertical adjustment knob It is preferably configured to include a horizontal connecting rod connected in the horizontal direction, and the sensor clamp is connected to the horizontal connection so that the adjustable angle is fixed to the contact sensor.

The TIG automatic welding device for steel pipe connection according to the present invention is configured to be able to weld the TIG so that the steel pipe can be connected by the V-type butt welding method, and also ensure the stability and precision of the traveling structure required for the TIG welding. There is an advantage to be able to improve the welding quality of the steel pipe connection.

In particular, the present invention has the advantage that the replacement work of the welding torch can be made more convenient because it is configured to rotate the torch clamp on which the welding torch is mounted in the front-back direction.

In addition, since the present invention is configured to easily change the position of the welding torch, welding wire, contact sensor, etc. according to the welding direction of the steel pipe, it is possible to perform a variety of welding operations and at the same time improve the weldability and welding convenience. There is an advantage to this.

In addition, the present invention has an advantage that the structure around the welder can be easily arranged and the supply of the welding wire can be made smoothly because the welding wire feeding device is mounted on the carriage.

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

The apparatus of the present invention is an apparatus for butt welding small diameter steel pipes having a diameter of about 500 mm, which is used for a waste conveying pipe. The apparatus of the present invention is not necessarily applied only to small-diameter steel pipes, and can be widely applied to general steel pipe joint equipment.

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 an automatic welding device for connecting a steel pipe according to the present invention.

As shown, the automatic welding device for connecting the steel pipe 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 that are coupled to both sides 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 70 for adjusting the opening and closing state of the quarter-type body (56, 57), as shown in FIG. Where the body 56, 57 is in contact with each other is provided with a locking device 80 to prevent the opening in the state holding 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 composed of a welding robot 200, the welding robot 200 is provided with a welding running portion 110 protruding in a circular ring structure on one side of the circular body 50 The welding travel part 110 is configured to be equipped with a welding robot 200 for welding the outer surface of the steel pipe while moving along the circumference of the steel pipe.

The main components of the automatic welding device for connecting a steel pipe of the present invention having such a configuration will be described in detail with reference to FIGS. 5 to 11 as follows.

5 and 6 are a perspective view and a detailed part of the automatic welding device for connecting the steel pipe according to the present invention shown in detail, Figures 7 and 8 are a front view and a detail of the main part of the automatic welding device for connecting the steel pipe according to the present invention. 9 is a side view of an automatic welding device for connecting a steel pipe according to the present invention.

10 is a front configuration diagram of a steel pipe connection automatic welding device according to the present invention, showing a state before gripping the steel pipe, and FIG. 11 is a front configuration diagram of a steel pipe connection automatic welding device according to the present invention. The figure shows the gripped state.

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

The circular body 50 is a quarter having an upper body 55 having a semi-circular structure, and rotatably connected to both ends of the upper body 55 and locked at both ends as shown in FIG. 7. It consists of a 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, and mutually assembled 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.

9, the connecting plate 61 is fixed to both sides of the circular body 50, and the connecting shaft 62 is installed between the two connecting plates 61. A connecting ring 63 capable of connecting a chain or the like to the connecting shaft 62 is configured. 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.

10 and 11, the opening and closing device 70 includes a hydraulic cylinder 71 and is provided in both of the quarter-shaped bodies 56 and 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.

And the outer side of the connecting portion of the upper body 55 and the quarter-shaped body (56, 57) is covered with a protective cover 75 to prevent foreign matter, etc. to enter inside, as shown in FIG.

The protective cover 75 is preferably made of a flexible material so as to block foreign substances that may enter the device without disturbing when the quarter-shaped body (56, 57) rotates, In the embodiment has been exemplified that consisting of a stream of materials to produce belts. Of course, it is also possible to use leather or other flexible sheet-like materials, without being limited to streams.

Both ends of the protective cover 75 may be fixed to the outer surfaces of the upper body 55 and the quarter-shaped bodies 56 and 57 by using a screw or the like, or, if necessary, attached by using an adhesive such as a bond. Do.

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. This locking device 80 is preferably configured to be locked by the hydraulic pressure.

Referring to FIGS. 10 and 11, the locking device 80 includes a locking cylinder 81 installed in the center in a state in which both locking parts 56a and 57a of the both quarter-shaped bodies 56 and 57 overlap each other. The rod 82 of the protruding to both sides is configured to be locked while penetrating the both locking portions (56a, 57a), respectively.

Next, the circular body 50 is configured with a plurality of shaping devices 90 for adjusting the roundness of the steel pipe (P), and stably fixing the device of the present invention around the steel pipe.

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 to protrude further out of the circular body 50 to uniformly contact the steel pipe as shown in FIGS. 5 and 9. The shaping plate 93 is provided with a plurality of buffer pads 95 at regular intervals so as to gently 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 FIG. 9 denotes 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, in FIG. 10, reference numeral 99 denotes solenoid valves including the orthogonal cylinder 91, which regulates hydraulic pressure to the opening / closing cylinder 71, the locking cylinder 81, and the like. These solenoid valves 99 may be installed inside the upper portion 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 An automatic welding part is configured to perform TIG (Tungsten inert gas welding) butt welding on the outer surface of the steel pipe (P).

The automatic welding part includes a welding running part 110 protruding in a circular ring structure from one side of the circular body 50, and a welding robot 200 including a welding machine 300 and a carriage 201 provided with the welding device. ) Moves along the welding travel unit 110, it is configured to be able to weld the connection of both steel pipes (P).

The welding travel part 110 which comprises an automatic welding part, the carriage 201 and the welding machine 300 which comprise the welding robot 200 are demonstrated in order.

First, the welding running unit 110 is provided on one side of the circular body 50 to protrude in a ring-shaped structure and the rail support plate 111, the inner surface of the rail support plate 111 is provided with the carriage 201 It is composed of a running rail 115 made to be moved accordingly.

Here, the rail support plate 111 and the traveling rail 115 are configured to be divided in the same manner as the upper body 55 and the quarter-shaped bodies 56 and 57 in the circular body 50.

The rail support plate 111 is configured to have a width such that the carriage 201 to be described in detail below to have a width enough to be located directly in the outer upper space of the support plate 111 in a 'c' shaped structure as shown in FIG. Preferably, a plurality of square holes 112 are formed in the portion attached to the circular body. This square hole is a part configured to be easily assembled using an assembly tool when assembling the parts constituting the apparatus of the present invention.

The traveling rail 115 is formed in a plate structure having a predetermined width, and is installed in a state spaced apart from the inner surface of the rail support plate 111, a plurality of rail support 113 is installed in the spaced apart space do.

In particular, the running rail 115 is formed such that the inner circumferential surface and the outer circumferential surface of both sides are inclined, the inclined surface is formed so that the roller 213 of the carriage 201 to be described later can move while contacting.

The traveling rail 115 is installed to be fixed to the rail support plate 111 by the rail fixing bolt 117 as shown in FIG. 5.

In particular, the running rail 115 is formed in an elongated plate structure, as shown in Figs. 12 and 13, the roller contact surface 115a to which the traveling roller 213, which will be described later, is formed on both sides thereof, respectively. On one side, a gear tooth 115b of a rack structure is formed so that the driving gear 219 to be described later is engaged. Here, since the gear tooth 115b is formed on the inner side of the travel rail 115, the problem that foreign matters are caught in the gear tooth from the outside is minimized, thereby minimizing an error that may occur while driving the welding robot 200. More precise driving operation is possible.

The gear tooth 115b is preferably formed on one side of the travel rail 115, and, if necessary, is formed of a material different from the travel rail 115 and installed in a structure fixed to the side of the travel rail 115. It is also possible. The reason why the gear teeth 115b are formed of different materials and coupled to the traveling rails 115 is to ensure that the gear teeth 115b are not easily worn during the carriage 201 driving process, and thus the life of the gear teeth 115b can be maintained for a long time. will be.

In addition, the running rail 115 is formed in a concave structure of the outer surface and the inner surface of the center portion, which is to reduce the load of the entire running rail (115). Of course, the roller contact surfaces 115a formed on both sides of the travel rail 115 are formed on the outer side of the relatively thickly protruding portion.

Next, the carriage 201 rotating around the steel pipe along the traveling rail 115 as described above will be described.

The carriage 201 according to the present invention is configured to stably travel along the traveling rail 115 and is configured to adjust the welding position back and forth and up and down while supporting the welder 300.

The carriage 201 is largely composed of the traveling body 210, the frame 230, and the horizontal and vertical adjustment unit 250, and the respective configurations will be described.

First, the driving body 210 will be described with reference to FIGS. 12 and 13.

The traveling body 210 includes a traveling body 211 constituting a body and a plurality of traveling rollers 213 provided on the traveling body 211 and closely contacting both roller adhesion surfaces 115a of the traveling rail 115. It is composed of

The traveling body 211 has roller mounting portions 212 erected vertically on both sides thereof, and the traveling rollers 213 are rotatably installed inside the roller mounting portions 212. At this time, it is preferable that the traveling rollers 213 are provided with four pairs of rollers, two pairs at the front and two at the rear in the moving direction of the carriage 201.

Of the traveling rollers 213, the rollers in close contact with one of the traveling rails 115 are linearly moved to adjust the degree of adhesion or the carriage 201 is attached to the traveling rails 115. The roller adjuster 215 is configured to be.

The roller adjuster 215 may be configured as an adjustment knob made of a screw coupling structure to the traveling body 211 outside the one roller mounting portion 212 of the traveling body 211.

A driving motor 217 for generating driving driving force is installed below the driving body 210.

The driving gear 219 meshes with the gear tooth 115b of the traveling rail 115 is installed inside the traveling body 211 so that the carriage 201 rotates while being driven by the driving force of the traveling motor 217. And configured to move along 115. Of course, a power transmission means is connected between the driving motor 217 and the drive gear 219 so as to transmit rotational power, the power transmission means being driven through the speed reducer 221 and the travel body 211 ( 223).

As described above, the plurality of travel rollers 213 provided on the travel body 210 are configured to be in close contact with both side surfaces of the travel rails 115, so that the welding robot 200 of the present invention is more stably mounted without shaking. Traveling operation becomes possible, which makes it possible to more smoothly perform a welding operation that requires precision, such as TIG welding, which can greatly contribute to improving the welding quality as a whole.

Next, the frame unit 230 will be mainly described with reference to FIGS. 9 and 13.

The frame part 230 has a vertical plate 231 largely connected to the traveling body part 210, and is connected in a horizontal direction to an upper portion of the vertical plate, such that a control box 235 and a wire feeding device 240 are provided at an upper portion thereof. It consists of a mounting plate 233 to be installed.

The vertical plate 231 is fixed to the side of the traveling body 211 and is erected vertically in the outward direction of the rail support plate 111.

The mounting plate 233 is positioned in the horizontal direction at the top of the vertical plate 231.

As a result, the traveling body 210, the vertical plate 231, and the mounting plate 233 are arranged in a 'c' shape around the rail support plate 111, which is welded as shown in FIG. 9. In the robot 200 structure, the overall load is properly distributed from the portion supported by the travel rail 115 to secure a stable travel support structure, and also minimize the distance that the welder 300 protrudes from the rail support plate 111. It becomes possible.

On the mounting plate, a control box 235, a wire feeder 240, a horizontal vertical adjustment unit 250, and the like are mounted and installed.

Here, the control box 235 is a part composed of circuits for controlling the overall welding operation, the moving speed of the carriage 201, the feeding speed of the welding wire 241, the position adjustment of the welder 300, the welder 300 It is configured to be able to control all the elements that need to be controlled, such as power supply.

The control box 235 may constitute some control unit in the box itself, and the other control unit may be configured through a separate control box. The configuration of the regulator box 260 will be described again below.

The wire feeder 240 provides a feed roller 243 on which the welding wire 241 is wound and a feed force to supply the feed wire 241 to the welder 300 by the feed roller 243. Supplying the welding wire 241 to the feeding motor 245, the feeding regulator 247 for adjusting the supply speed of the feeding wire 241, and the wire clamp 380 to be described later on the feeding regulator 247 side. And a feed cable 248 connected to it.

Next, the horizontal vertical adjustment unit 250 will be described.

Horizontal and vertical adjustment unit 250 is installed to be supported on the mounting plate 233, so that the position of the welding torch 370 of the welder 300 can be adjusted in the horizontal (front and rear) or vertical (vertical) direction The horizontal adjuster 251 and the vertical adjuster 255 are configured.

The horizontal adjuster 251 and the vertical adjuster 255 use a linear motor to move the welder 300 horizontally (forward and backward lengthwise) or vertically (radially in the direction of the steel pipe) like a conventional position adjusting device. It can be configured to move to.

That is, the horizontal adjustment unit 251 is installed in the horizontal direction on the upper portion of the mounting plate 233, the vertical adjustment unit 255 is configured to be connected to the front.

The vertical adjusting part 255 is fixed to the connecting plate 256 connected to the horizontal adjusting part 251 in the vertical direction.

The vertical adjuster 255 is connected to the horizontal adjuster 251 to move the whole in the horizontal (front and rear) direction, and to move the first support 310 to be described later in the vertical direction, that is, the vertical direction As configured to, a drive motor is installed in the vertical adjustment box as in the normal vertical position adjustment device, the first support 310 is moved up and down by the driving force of the drive motor.

That is, the horizontal adjusting unit 251 and the vertical adjusting unit 255 are used a conventional linear feed mechanism, for example, by adopting a ball screw, etc. to enable the linear movement of the connecting parts by the driving force of the motor Can be configured.

The regulator box 260 is installed at the front upper portion of the vertical adjustment unit 255, the regulator box 260 is connected to the control box 235 is configured to adjust the welding operation, weaving speed and the like.

Next, the welding machine 300 supported by the carriage 201 and performing welding is demonstrated.

The welder 300 will be described in order from the portion connected to the vertical adjustment unit 255, the first support 310, the second support 320, the weaving operation unit 330, the fixing block 340, the rotation block 350. ), A torch clamp 360, a welding torch 370, a wire clamp 380, a sensor mounting module 390, and a contact sensor 400.

The first support 310 is formed long in the left and right direction, it is preferably formed of a rod structure made of an insulating material.

The second support 320 is fixed to the central portion of the first support 310, the sensor module mounting portion 312 is formed so that the sensor mounting module 390 to be described later can be installed on both sides. Referring to FIG. 6, the sensor module mounting part includes a hole 313 formed to fix the sensor mounting module 390, and a slit 314 to divide the first support from the hole 313. It is formed so that the sensor mounting module 390 can be fixed by tightening the fixing bolt 315.

The second support 320 is installed long in the front of the center of the first support 310, the weaving operation unit 330 is configured on the upper and lower portions.

The weaving motor 331 is installed on the upper portion of the second support 320, the weaving plate 333 to enable the weaving operation is installed on the lower portion.

That is, the weaving plate 333 is installed to allow relative movement with the second support 320 so that when the weaving motor 331 operates, the welding torch (sliding forward and backward from the second support 320) 370 is configured to enable weaving welding.

A fixing block 340 is installed below the weaving plate 333.

The rotating block 350 is installed on the side of the fixed block 340, the rotating block 350 is configured to be connected to be rotated in the front and rear direction from the fixed block 340.

The reason why the fixed block 340 and the rotation block 350 are installed to be relatively rotatable will be described below with reference to FIGS. 16 to 18.

The torch clamp 360 is installed in the rotary block 350, and the welding torch 370 is assembled into the rotary block 350 by inserting the torch clamp 360 and the rotary block 350 upward and downward.

A cooling water passage for cooling the welding torch 370 during welding is formed inside the torch clamp 360, and a cable 361 for supplying power and cooling water to the welding torch 370 is connected. .

One side of the torch clamp 360 is provided with a wire clamp 380 for supporting the welding wire 241 provided from the wire feeder 240 and at the same time to guide the wire supplied to the end of the welding torch 370. .

In particular, the torch clamp 360 is rotatably installed in the rotation block 350 by 180 degrees, for the purpose of freely selecting and operating the welding direction in the clockwise or counterclockwise direction when welding the steel pipe.

A detailed description thereof will be described again with reference to FIGS. 16 to 19.

The welding torch 370 mounted on the torch clamp 360 is configured to enable the gas-tungsten arc welding method, that is, the TIG welding method, among the arc welding methods. It is configured to supply an inert gas (eg, argon gas) around the electrode, and is configured to melt and weld the welding wire 241 while generating an arc between the electrode and the welding portion during welding.

The torch clamp 380 is a component that supports to continuously supply the welding wire 241, that is, the solid wire (SOLID WIRE) to the welded portion of the steel pipe, so as to properly adjust the supply position of the welding wire It is composed.

As a result, while the welding torch 370 and the welding wire 241 are mounted on the torch clamp 370 and the wire clamp 380, the positions of the welding torch 370 and the welding wire 241 are properly adjusted. In the state, by the weaving operation unit 330 described above, it is possible to perform the TIG welding while weaving at the same time.

Next, the sensor mounting module 390, as described above is mounted on both ends of the first support 310 is configured to mount the contact sensor 400.

Here, the welding apparatus of the present invention is mainly configured to use a TIG welding method, while the gap between the welded portion of the steel pipe and the welding torch 370 is kept constant at all times due to the characteristics of the TIG welding. It is necessary to proceed the welding to ensure excellent welding quality. Therefore, the contact sensor 400 is used as a method of maintaining a constant gap between the weld of the steel pipe and the welding torch.

The sensor mounting module 390 to which the contact sensor 400 is mounted is configured such that the sensor mounting module 390 is installed on both sides of the first support 310, which is in contact with the welding direction of the steel pipe. It is a structure for selectively installing the type sensor 400. This will be described below with reference to FIGS. 18 to 19, and each sensor mounting module 390 will be described.

The sensor mounting module 390 includes a cross adjuster 391 configured to be capable of adjusting the length of the sensor in the vertical and horizontal directions, and the first supporter coupled to the adjuster 391 in the horizontal direction. A horizontal adjustment knob 392 and a horizontal adjustment knob 392 configured to allow a position adjustment in the horizontal (front and rear) direction of the contact sensor 400 to be fixed to the end 310 are vertically coupled to the control unit 391. A vertical adjustment knob 393 configured to adjust the position of the sensor 400 in a vertical direction, a horizontal connecting portion 394 connected in a horizontal direction to an end of the vertical adjusting knob 393, and the horizontal connecting portion 394 It is configured as a sensor clamp (395) that is connected to the angle adjustable so that the contact sensor 400 is fixed.

In this case, the contact sensor 400 is a sensor that normally touches a specific object and detects a change in position thereof. As shown in the drawing, a sensor probe 401 and a signal transmission box 402 for transmitting a signal of the probe to the outside are provided. It is made to, so as to move along the portion to be welded on the outer surface of the steel pipe connecting portion serves to change the welding position of the welding torch 370 appropriately.

Of course, in the embodiment of the present invention has been described by illustrating the contact sensor 400, it is also possible to configure using a non-contact sensor 400 capable of tracking the welding position, depending on the conditions.

As described above, the touch sensor 400 uses the horizontal adjustment knob 392, the vertical adjustment knob 393, the horizontal connecting rod 394, and the connection portion of the sensor clamp 395 in the X, Y, Z, and θ directions. Position adjustment is possible. Such a contact sensor is preferably adjusted to be positioned as close as possible to the welding torch 370.

The result of detecting the contact sensor 400 while contacting the outer surface of the steel pipe is input to the main control unit through the control box 235, the horizontal control in the main control unit in accordance with the detection result of the contact sensor 400 The adjustment unit 250 is operated to adjust the welding position of the welding torch 370.

Meanwhile, in the above, the configuration for setting the position of the contact sensor 400 is mainly made of a manual structure. However, the horizontal adjustment knob 392 and the vertical adjustment knob 393) can also be configured to adjust the position.

Now, the structure of the above-mentioned weaving operation unit 330 and the welding torch rotating structure will be described.

First, referring to FIGS. 14 and 15, the weaving operation unit 330 will be described in detail.

FIG. 14 is a side view illustrating the welder weaving structure of the present invention, and FIG. 15 is a plan view seen from the line B-B of FIG. 14.

As shown in these figures, the second support 320 is connected to the weaving shaft 335 which repeatedly moves from side to side between the weaving motor 331 and the weaving plate 333 when viewed from the side.

Of course, the second support 320 is formed with a weaving hole 321 through which the weaving shaft 335 penetrates, and the weaving hole 321 is a slot formed long in the movement direction of the weaving shaft 335. It is preferable that it consists of a structure.

In the weaving motor 331, the weaving generating unit may be configured to repeatedly operate the weaving shaft 335, and the weaving generating unit may rotate according to the forward rotation or the reverse rotation of the weaving motor 331. Motor gear 337 and a rack 338 that moves left and right in accordance with the rotational movement of the motor gear 337. Of course, the rack 338 is fixed to the weaving shaft 335 is installed.

Here, the weaving motor 331 may be configured as a stepping motor capable of precise control by an inverter, and may be configured to control the weaving width by controlling the potentiometer meta of the weaving controller 339 as shown in FIG. 15. .

And it is preferable that a guide mechanism is installed between the second support 320 and the weaving plate to enable a stable sliding reciprocating motion.

As described above, the weaving operation unit 330 according to the present invention is configured to enable the weaving operation of the welding torch 370 by the reciprocating sliding motion, so that the steel pipe welding can be performed while implementing a simple weaving operation with a simple structure. do.

Next, with reference to FIG. 16 and FIG. 17, the back and forth rotational motion of a torch support is demonstrated.

Figure 16 is an exploded perspective view for explaining the front and rear rotational movement of the torch support in the present invention, Figure 17 is a cross-sectional view of the combined state of the two blocks seen in the direction of C-C of FIG.

As shown in these figures, the torch support is divided into a fixed block 340 and a rotating block 350, the fixed block 340 is installed fixed to the weaving plate 333, the rotating block 350 is configured to be coupled to the rotating shaft 353 to the fixed block 340 to rotate.

That is, a shaft hole 343 is formed inwardly from the side of the fixing block 340, the rotating block 350 is installed so that the rotating shaft 353 protrudes long, the rotating shaft 353 is the shaft hole 343 ), The rotation block 350 is assembled to the fixed block 340 in a fixed state by fixing its position with the detent knob 345 provided in the fixing block 340.

Here, a detent ball 346 and a groove 354 provided in a normal detent mechanism are formed between the detent knob 345 and the rotation shaft 353 of the fixing block 340, respectively, so that the rotating block ( 350 is configured to stop exactly at a preset rotation angle.

The reason why the rotating block 350 is configured to be rotatable from the fixed block 340 is that the rotating block 350 is replaced when the welding torch 370 inserted and installed in the vertical direction to the torch clamp 360 is replaced. To rotate the welding torch 370 more conveniently in a state rotated 90 degrees forward from the fixing block 340.

Next, referring to FIGS. 16 to 19, the 180-degree left-right rotational motion of the welding torch 370 will be described.

18 and 19 is a front view of the main portion showing a rotating structure of the welding torch in the present invention.

In the present invention, the welding torch 370 is installed to enable a 180-degree rotational movement on the rotary block 350, which is capable of rotating the vertical axis 363 provided in the torch clamp 360 to the rotary block 350. This can be achieved by combining them.

That is, when the torch clamp 360 is rotated in the left or right direction while the vertical axis 363 of the torch clamp 360 is inserted into the rotary block 350, the wire clamp 380 is shown in FIG. 18. As shown in FIG. 19, the welding torch 370 moves to the left or the right.

This structure, as shown in Figure 16 and 17, the detent coupling structure in a state that the vertical axis 363 of the torch clamp 360 is inserted into the torch hole 351 of the rotary block 350. The position is determined by the 180 degree phase difference.

That is, the detent ball 357 supported by the detent bolt 355 and the spring 356 is mounted in the torch hole 351, and a detent groove ( As the 364 is formed, the position of the welding torch 370 may be accurately determined.

On the other hand, the rotating block 350 is formed so that one portion is divided around the torch hole 351 is configured to firmly fix the torch clamp 360 by using a tightening bolt 358.

As described above, when welding the steel pipe as configured to rotate the torch clamp 360, the welding direction is set in the clockwise or counterclockwise direction of the steel pipe as shown in Figs. The welding torch 370 and the wire clamp 380 are rotated and positioned according to the direction.

In addition, when the contact sensor 400 is also mounted on any one of the sensor mounting module 390 provided on both the left and right so as to be located directly in front of the wire clamp 380, clockwise or counterclockwise depending on the implementation conditions Steel pipe welding can be performed freely.

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 a 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 orthopedic joint of the prior art,

5 and 6 are a perspective view and a main part detailed view showing an automatic welding device for connecting a steel pipe according to the present invention,

7 and 8 is a front view and a detailed view of the main portion of the automatic welding device for connecting steel pipes according to the present invention,

9 is a side view of an automatic welding device for connecting a steel pipe according to the present invention;

10 is a front configuration diagram of the automatic welding device for connecting the steel pipe according to the present invention, showing the state before the steel pipe gripping,

11 is a front configuration diagram of an automatic welding device for connecting a steel pipe according to the present invention, a view showing a state of holding a steel pipe,

12 is a perspective view showing a welding robot driving structure of the automatic welding device for connecting a steel pipe according to the present invention;

13 is a cross-sectional view showing a welding robot driving structure of the automatic welding device for connecting a steel pipe according to the present invention;

Figure 14 is a side view for explaining the welder weaving structure in the present invention,

15 is a plan view seen from the line B-B of FIG. 14,

Figure 16 is an exploded perspective view for explaining the front and rear rotational movement of the torch support in the present invention,

17 is a cross-sectional view of a combined state of two blocks seen in the direction of C-C of FIG. 16;

18 and 19 is a front view of the main portion showing a rotating structure of the welding torch in the present invention.

<Explanation of symbols for the main parts of the drawings>

50: circular body 55: upper body

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

70: switchgear 75: protective cover

80: lock 90: orthopedic

110: welding running portion 111: rail support plate

113: rail support 115: running rail

200: welding robot 210: running body portion

230: frame portion 235: control box

240: wire feeder 250: horizontal vertical adjustment unit

300: welding machine 310: first support

320: second support 330: weaving operating unit

340: fixed block 350: rotating block

360: torch clamp 370: welding torch

380: wire clamp 390: sensor mounting module

400: contact sensor

Claims (7)

A circular body configured to be opened and closed to grip a steel pipe; A welding support portion provided with a rail support plate protruding in a circular ring structure from one side of the circular body and a traveling rail inside the rail support plate; A carriage connected to the traveling rail at a position outside the rail support plate and rotating; TIG automatic welding for steel pipe connection comprising a welder supported by the carriage and configured to weld the outer surface of the steel pipe, the welding torch and the welding wire being rotatable in opposite directions to enable bidirectional welding of the steel pipe. Device. The method according to claim 1, The carriage is coupled to the travel rail of the welding running portion moving body portion moving along the travel rail, the frame portion which is located on the outside of the rail support plate connected to the traveling body portion, the frame portion is provided in the welder TIG automatic welding device for connecting a steel pipe, characterized in that it comprises a horizontal and vertical adjustment for adjusting the horizontal and vertical position of the. The method according to claim 2, Steel frame connection TIG (TIG) automatic welding device, characterized in that the frame portion is provided with a wire feeder for providing a welding wire to the welder. The method according to claim 1, The welder includes a support connected to the carriage, a weaving operation unit provided at the support to allow the welding torch to operate, a fixing block connected to the weaving operation unit and installed in a horizontal direction from the side of the fixing block. A rotatable block connected to the rotatable block, a torch clamp rotatably installed on the rotatable block, a torch clamp mounted on the rotatable block, a wire clamp installed on the torch clamp to provide a welding wire, and a contact type provided at both sides of the support stand. TIG automatic welding device for connecting a steel pipe, characterized in that it comprises a plurality of sensor mounting module to selectively install the sensor. The method according to claim 4, The rotary block is a TIG automatic welding device for connecting a steel pipe (TIG), characterized in that rotatably installed in the front and rear direction with respect to the fixed block to facilitate the replacement of the welding torch. The method according to claim 1, The welder includes a support connected to the carriage and a plurality of sensor mounting modules respectively provided on both sides of the support to selectively install a contact sensor according to a rotation direction of the welding torch and the welding wire. TIG automatic welding device for connection. The method according to any one of claims 4 to 6, The sensor mounting module is a cross-shaped adjuster configured to enable length adjustment to adjust the position of the sensor in the vertical and horizontal directions, and is coupled to the adjuster in the horizontal direction and the end of the support is fixed to the contact sensor. A horizontal adjustment knob configured to enable horizontal position adjustment, a vertical adjustment knob coupled to the control unit in a vertical direction to enable position adjustment of the vertical direction of the touch sensor, and an end portion of the vertical adjustment knob TIG automatic welding device for a steel pipe connection comprising a horizontal connection connected in the horizontal direction, and a sensor clamp that is connected to the horizontal connection so that the angle adjustment is fixed to the contact sensor.

Images