KR101783120B1

KR101783120B1 - Welding device

Info

Publication number: KR101783120B1
Application number: KR1020160005516A
Authority: KR
Inventors: 임동용; 심덕남
Original assignee: 두산중공업 주식회사
Priority date: 2016-01-15
Filing date: 2016-01-15
Publication date: 2017-10-23
Also published as: KR20170085857A

Abstract

[0001] The present invention relates to a welding apparatus, and it is possible to improve welding quality by securing movement of a tungsten electrode rod in a narrow space by using a tilting structure or a pivoting structure.

Description

Welding device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding apparatus, and more particularly, to an apparatus capable of improving welding quality by securing movement of a tungsten electrode rod in a narrow space using a tilting structure or a pivoting structure.

"Welding" means welding two or more objects or materials to be welded in a molten or semi-molten state, joining the welded material (welding rod) to the welded portion (fusion welding), heating the joint portion to an appropriate temperature A method of bonding by applying pressure in a cold state (pressure welding), or a method of melting a metal having a lower melting point than the base material without melting the whole of the base material and bonding the same with a suction force by surface tension between the joint portions (soldering: Brazing & Soldering ).

On the other hand, GTAW (gas tungsten arc welding) uses arc heat generated by using tungsten electrode rod to melt and bond the base material, and also uses a fugitive material.

At this time, inert gas such as Ar or He is used as a protective gas, so it is called TIG (Tungsten Inert Gas) welding, and productivity is low, but arc is stable and weld quality is excellent, so it is used for welding of material sensitive to oxidation or nitriding .

Such GTAW is mainly applied to pipe welding in the shipbuilding sector, and is also used for membrane welding of LNG or for forming backside beads of some Butt Joints. It is used for welding of thin plate which does not require post-welding, repair of structure, especially repair work of die casting, repair of non-ferrous metal.

Such GTAW welders use constant current (DCSP) characteristics and use AC voltage (AC) when welding Al and its alloys. Arc generation uses non-contact high-frequency generation technique and contact generation method. There is also a pulse welder that can adjust the peak current and base current for special purposes and is mainly applied to automatic TIG welding. The pulse current can reduce the amount of heat input to minimize the deformation, have a stable arc, can form a more stable backside bead, are more suitable for electron beam welding, and have a good shape of the molten pool .

In addition, the electrode used for TIG welding must have a high melting point (tungsten melting point: 3410 ° C), low electrical resistance, good thermal conductivity, electron emission capability, and pulse conditions to adjust the peak current and base current , A suitable material for this is tungsten.

The types and characteristics of the tungsten electrode rod are as follows.

Pure tungsten electrodes are indicated in green, they are inexpensive and generate stable arc during AC welding. The tungsten electrode rod containing 0.9 - 1.0ThO2 is yellow, and effective arc is generated by thorium oxide. The temperature of the electrode can be kept lower than that of pure tungsten. In addition, tungsten electrodes containing 1.8 - 2.0 ThO2 are marked in red and used mainly as welding electrodes. Tungsten electrodes containing 0.3 - 0.5 ZrO2 are marked with brown and arc is less generated than thorium oxide. However, In addition, the thorium oxide is harmful when grinding the electrode, so the mask must be worn.

On the other hand, inert gas is basically used as the protective gas.

The Ar gas has a larger specific gravity than the He gas. In other words, since the gas sinks, the shielding effect can be seen even at a small flow rate. In the case of the upper view welding, the gas flow rate should be increased or He gas should be used, the arc generation is better, Should be welded. Since He gas has a small specific gravity, it is necessary to increase the gas flow rate and to use a higher voltage than Ar, so that it is possible to increase the welding speed, but it is expensive. It is possible to increase the welding speed due to the increase of voltage when hydrogen gas is added and it is effective for metals with high thermal conductivity. It is effective when welding Ni alloy and stainless steel. It should not be used for hydrogen embrittlement base materials such as Al, Cu, Mg. When 1% oxygen is added to Ar, the effect of strengthening the arc is obtained, and when the nitrogen is added, the arc of high temperature is generated during the welding of copper, so that the difficulty of welding due to the high thermal conductivity of copper can be overcome.

The above-mentioned GTAW welding is low in productivity, but it can perform high quality welding work for most metals and non-metal alloys, and does not require special cleaning work such as slag removal after welding, easy observation of arc and molten metal during welding, And it is easy to adjust welding heat input. Therefore, it is good for thin plate welding, and it is easy to weld non-ferrous metal because flux is unnecessary, The workability is good because the observation of the welding condition is easy.

In this case, when welding is performed, welding may be carried out by inserting a tungsten electrode into a narrow space of the base material. In this case, products that reduce the width of the welding apparatus have been developed. However, there is a limit in reducing the width of the welding apparatus. Therefore, there is a limit to the movement of the electrode in order to uniformly weld the entire width of the narrow space.

That is, the movement of the electrode rod is freely enlarged, so that a structure of a welding apparatus capable of maintaining the welding quality even when the welding operation is performed in a narrow space of the base material is required.

Korean Patent Publication No. 10-2014-0132754

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the conventional art as described above, and it is an object of the present invention to provide a tungsten electrode structure capable of performing welding well in a narrow space by ensuring movement of a tungsten electrode rod using a tilting structure or a pivoting structure, And to provide a device capable of improving the quality.

According to an aspect of the present invention, there is provided a welding apparatus including a device body connected to a moving device of a welding facility, a driving unit fixed to the device body, an angle adjusting unit interlocked with the driving unit and rotated at a predetermined angle, And a torch portion connected to the angle adjusting portion and having a welding angle of the electrode rod adjusted according to the movement of the angle adjusting portion.

In addition, in the embodiment of the present invention, the driving unit may include a driving motor having a shaft, a coupling part connected to a lower portion of the device body at one side, and a mounting part coupled to the driving motor at the other side, A screw bar connected to the shaft of the driving motor inserted into the shaft hole and a saddle disposed on the screw bar and provided to move on the screw bar in accordance with the rotation of the shaft, .

In addition, in the embodiment of the present invention, the angle adjusting unit may include a support rod connected to a lower portion of the apparatus body, and a support rod fixed to the saddle so that the saddle can be rotated at a certain angle in accordance with the movement of the saddle, The first rotary arm connected to the first rotary arm by a hinge and the first rotary arm connected to the first rotary arm by a connecting pin so that at least a part of the first rotary arm is connected to the support rod by a hinge And a second U-shaped syngeneic rock.

In addition, in the embodiment of the present invention, the torch portion may include a torch portion, which is bolted and connected to the upper and lower ends of the second rotatable arm, hinged to the center of the second rotatable arm, A frame, and an electrode rod holder disposed at a central portion of the torch frame and coupled to the electrode bar at a lower end thereof.

Further, in the embodiment of the present invention, the torch portion may further include a gas injection portion for injecting a protective gas into a peripheral portion of the electrode rod during operation of the electrode rod, wherein the gas injection portion is connected to the gas supply portion, And a gas chamber formed inside the lower portion of the torch frame and connected to the gas flow channel.

Further, in the embodiment of the present invention, the gas injection unit may further include a diffusion filter disposed under the gas chamber so that the protective gas is uniformly injected into the peripheral portion of the electrode.

In addition, in the embodiment of the present invention, the outer cut portion may be formed at an angle at both sides of the lower portion of the torch frame in which the gas chamber is formed, so that the spraying range of the protective gas is enlarged to the peripheral portion of the electrode.

Further, in the embodiment of the present invention, the inner cutout portion is formed on the lower center side of the torch frame in which the gas chamber is formed, so that the injection amount of the protective gas is increased in the direction opposite to the advancing direction of the electrode rod. The direction side inner cutout portion can be further cut than the advancing direction side inner cutout portion of the electrode bar.

Further, in the embodiment of the present invention, the torch portion further includes a cooling portion for cooling the working electrode rod, wherein the cooling portion includes an inner diameter passage connected to the cooling water supply portion and disposed at an inner central portion of the electrode rod holder, An outer diameter passage formed between inner side portions of the electrode rod holder, and a flow hole connected between the inner diameter passage and the outer diameter passage, and the cooling water may flow through the inner diameter passage and flow out through the outer diameter passage.

According to the present invention, by implementing a tilting structure using a plurality of hinges or by implementing a rotating structure using a driving motor, movement of the tungsten electrode rod within a certain angle range can be ensured, Allows welding to be performed properly.

In addition, a cooling channel can be formed in the electrode rod holder to cool the heat received by the tungsten electrode rod during the welding operation, thereby relieving the thermal load of the electrode rod and extending the service life of the electrode rod.

In addition, it is possible to prevent the spark from diffusing into a region other than the welding region by spraying inert protective gas to the peripheral portion of the welding region. At this time, by increasing the cutting angle on the welding direction opposite to the welding direction, it is possible to prevent the spark diffusion in the spot where the tungsten electrode rod passes.

This ultimately facilitates welding work in a narrow space of the welding target material, thereby contributing to ensuring ease of operation and improving welding quality.

1 is a perspective view of an embodiment of a tilting type welding apparatus according to the present invention.
Figure 2 is a side view of the invention shown in Figure 1;
Figure 3 is a front view of the invention shown in Figure 1;
Figure 4 is another side view of the invention shown in Figure 1;
Figure 5 is a partial cross-sectional view of the invention shown in Figure 1;
6A and 6B are tilting views of the invention shown in FIG.
7A and 7B are welding state diagrams for the invention shown in Fig.
FIG. 8 is a view showing a work state in a narrow space of a workpiece to be welded according to the invention shown in FIG. 1; FIG.
FIG. 9 is a view showing a welded state of a workpiece to be welded according to the invention shown in FIG. 1; FIG.
10 is a front view of an embodiment of a tilting type welding apparatus according to the present invention.
11 is a partial cross-sectional view of the invention shown in Fig.
Figure 12 is a diagram of a prototype of the invention shown in Figure 10;
FIG. 13 is a view showing a working state of the invention shown in FIG. 10; FIG.
FIG. 14 is a view showing a welded state of the workpiece to be welded according to the invention shown in FIG. 10; FIG.

Hereinafter, preferred embodiments of a welding apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment]

FIG. 1 is a perspective view of an embodiment of a tilting type welding apparatus according to the present invention, FIG. 2 is a side view of the invention shown in FIG. 1, FIG. 3 is a front view of the invention shown in FIG. 1, Fig. 5 is a partial cross-sectional view of the invention shown in Fig. 1, Figs. 6A and 6B are tilting state views of the invention shown in Fig. 1, Figs. 7A and 7B are cross- FIG. 8 is a view showing a work state in a narrow space of a workpiece to be welded, and FIG. 9 is a cross-sectional view of a welding work according to the invention shown in FIG. 1 Fig. 5 is a view showing a welded state of a target material; Fig.

1 to 9, an embodiment of a tilting-type welding apparatus 1100 according to the present invention includes an apparatus body 100, a driving unit 200, an angle adjusting unit 300, and a torch unit 400 .

First, the apparatus body 100 may be connected to a moving facility of a welding facility. The upper portion of the apparatus body 100 may be formed as a C-shaped partition wall 120 and a plurality of coupling holes 110 may be machined so as to be bolt-nut fastened to the moving device of the welding equipment . The lower portion of the apparatus body 100 may be formed as a support base 130 and the through holes 140 may be formed on the support base 130. As the through hole 140, a cooling water hose or a protective gas hose connected to the cooling unit 450 or the gas spraying unit 430 to be discussed below may be connected and disposed.

The driving unit 200 is fixed to the apparatus body 100. Specifically, the driving unit 200 may be connected to the lower end of the apparatus body 100. The driving unit 200 may include a driving motor 210, a connection bracket 220, a screw bar 230, and a saddle 240.

First, the connection bracket 220 is formed with a coupling portion 221 connected to a lower portion of the apparatus body 100 at one side and a mounting portion 223 at which the driving motor 210 is coupled at the other side. A shaft hole 225 may be formed at the center of the shaft 223.

1 and 2, the coupling part 221 is connected to the lower end of the apparatus body 100. [ Specifically, a bolt-nut 225 is fastened to the elongating unit 150 by machining the engaging unit 221 into a U-shape, and an elongated unit 150 is formed at a lower end of the apparatus body 100, .

The mounting portion 223 is disposed on one side of the coupling portion 221 and the mounting portion 223 may be provided in a slightly rounded circular shape so that the driving motor 210 can be seated. A parallel key insertion groove 224 is formed on the coupling portion 221 so that the driving motor 210 can be firmly fixed. A user inserts a parallel key when fixing the driving motor 210 The movement of the driving motor 210 is prevented.

A shaft hole 225 is formed at the center of the mounting portion 223, and a shaft of the driving motor 210 is inserted. At this time, the shaft of the driving motor 210 may be connected to the screw bar 230.

The screw bar 230 may be connected to the shaft of the driving motor 210 inserted in the shaft hole and may be disposed inside the a-shaped portion of the coupling portion 221. 4, a ball bearing 231 is installed in the shaft hole 225 of the mounting portion 223 to provide a rotation of the shaft of the driving motor 210. [

The saddle 240 may be connected and disposed on the screw bar 230 in a ball-screw manner. When the screw bar 230 is rotated in accordance with the rotation of the shaft, And can be provided to be moved forward and backward.

1 and 3, the saddle 240 may be provided in a Y-shape, and the upper portion 240 of the saddle 240 may include a bolt 241, 246 connected to a ball support 245 . A plurality of rolling balls are disposed in the ball support 245 to smoothly move the saddle 240 on the screw bar 230.

Next, the angle adjusting unit 300 may be interlocked with the driving unit 200 and rotated to rotate at a predetermined angle. The angle adjuster 300 may include a support rod 310, a first rotary arm 320, and a second rotary arm 330.

First, the support rod 310 may be connected to a lower portion of the apparatus body 100. Referring to FIG. 3, it can be seen that the support rod 310 is connected to the lower end of the mounting portion 223 of the connection bracket 220. The support rod 310 may be provided in a shape that is elongated in a downward direction and slightly bent at a certain position.

One end of the first rotary arm 320 is fixed to the saddle 240 and the other end of the first rotary arm 320 is connected to the support rod 310 by a hinge so that the first rotary arm 320 can rotate at a predetermined angle in accordance with the movement of the saddle 240. . Specifically, the first rotary arm 320 may be bolted to the lower portion of the saddle 240, and a lower portion of the first rotary arm 320 may be coupled to the support rod 310, Lt; RTI ID = 0.0 > 321 < / RTI >

One end of the second rotary arm 330 is connected to the first rotary arm 320 by a connection pin 333 so that the second rotary arm 330 can rotate at a predetermined angle in accordance with the movement of the first rotary arm 320, May be provided in a U-shape connected to the support rod 310 by a hinge. Specifically, a central protrusion 333 having a pin hole is formed on the upper portion of the second rotary arm 330, and a lower protrusion 323 having a pin hole is formed on the lower portion of the first rotary arm 320, The connection pin 324 is inserted into the pin hole to connect the first rotary arm 320 and the second rotary arm 330 to each other.

The end of the support rod 310 is located at the U-shaped center of the second rotary arm 330 and the second rotary arm 330 is connected to the support rod 310 by the hinge 331 .

When the driving motor 210 is operated, the screw bar 230 connected to the shaft of the driving motor 210 rotates. When the screw bar 230 is rotated, the saddle 240 disposed on the screw bar 230 moves forward and backward along the screw bar 230.

At this time, according to the movement of the saddle 240, the first rotary arm 320 can rotate at a predetermined angle with the support rod 310 as a support shaft. Of course, since the second sawtooth arm 330 is also connected to the first rotatable arm 320 with the support rod 310 as a support shaft, The second sawtooth arm 330 is zigzag and can rotate at a predetermined angle.

The torch portion 400 is connected to the angle adjusting portion 300 and may be provided to adjust the welding angle of the electrode rod 500 according to the movement of the angle adjusting portion 300. The torch portion 400 may include a torch frame 410, an electrode rod holder 420, a gas injection portion 430, and a cooling portion 450.

The torch frame 410 is connected to the bolts 418 at the upper and lower ends of the U shape of the second rotary shafts 330 and connected to the hinge 331 at the center of the second rotary shafts 330, And can be provided so as to be rotatable at an angle. The torch frame 410 may be machined to have a cut-out 417 at the center to reduce the weight. The torch frame 410 may be composed of an upper portion 410b and a lower portion 410a and may be connected by bolt fastening 419, respectively.

The electrode rod holder 420 may be disposed at a central portion of the torch frame 410 and the electrode rod 500 may be coupled at a lower end thereof. An upper portion 423 of the electrode rod holder 420 may be fixed on the torch frame 410.

5, the gas injection unit 430 may be provided to inject a protective gas into the periphery of the electrode rod 500 during operation of the electrode rod 500. Referring to FIG. The gas injector 430 may include a gas passage 431, a gas chamber 432, and a diffusion filter 433.

The gas channel 431 may be connected to the gas supply unit 430a and may be formed inside the torch frame 410. [ Specifically, the gas passage 431 may be formed in the upper portion 410b of the torch frame 410. [ The gas chamber 432 may be formed in a lower portion 410a of the torch frame 410 and may be connected to the gas channel 431.

The diffusion filter 433 may be disposed below the gas chamber 432 so that the protective gas is uniformly injected into the periphery of the electrode rod 500. The diffusion filter 433 may be provided in a U-shape.

Inert protective gas such as argon gas supplied from the gas supply unit 430a flows into the gas chamber 432 through the gas passage 431. [ The diffusion filter 433 is accumulated in the gas chamber 432 with resistance against the flow by the diffusion filter 433. When the gas is concentrated in the gas chamber 432 by a predetermined amount or more, The inert protective gas spreads in a sector shape and is sprayed to the periphery of the electrode rod 500. [

At both ends of the lower portion 410a of the torch frame 410 where the gas chamber 432 is formed, the outer cutout portion 411 is cut at a predetermined angle so that the spraying range of the protective gas is enlarged to the peripheral portion of the electrode rod 500, Can be formed.

The inner cutout portions 413 and 415 are formed on the central portion of the lower portion 410a of the torch frame 410 where the gas chamber 432 is formed and the inner cutouts 413 and 415 are formed in the direction opposite to the advancing direction of the electrode rod 500 The advancing-direction-side inner cutout 415 of the electrode rod 500 may be provided further than the advancing-direction inner cutout 413 of the electrode rod 500 so that the injection amount of the protective gas is enlarged.

This is to prevent the activity due to the spark which may occur in the material to be welded on the rear side of the electrode rod 500 after the welding operation. Since the activity of the material to be welded in the melted state is frequently generated at the spot welded by the electrode rod 500, the degree of cutting of the inner cutout portion 415 in the direction opposite to the traveling direction of the electrode rod 500 is increased, To be sprayed.

3, the cutting angle? 2 of the inner cutout portion 415 in the direction opposite to the advancing direction of the electrode bar 500 is greater than the cutting angle? 1 of the advancing direction side inner cutout portion 413 of the electrode bar 500 Can be seen. Due to the difference in the angle of incision, the range of injection of the protective gas is different.

Since the protective gas is formed into a fan shape by the outer cutout portion 411 and the inner cutouts 413 and 415 and is sprayed to the periphery of the workpiece and the electrode rod 500, .

The cooling unit 450 may be provided to cool the electrode rod 500 in operation and the cooling unit 450 may include an inner diameter passage 452, an outer diameter passage 453, and a flow hole 454 And the like.

The inner diameter channel 452 may be connected to the cooling water supply unit 451 and disposed at the inner center of the electrode rod holder 420. [ The outer diameter channel 453 may be formed between the inner diameter channel 452 and the inner portion of the electrode rod holder 420. The flow hole 454 may be formed in the lower portion of the electrode rod holder 420 so as to be connected between the inner diameter passage 452 and the outer diameter passage 453. [

The cooling water supplied from the cooling water supply unit moves from the upper portion to the lower portion through the inner diameter passage 452 and passes from the lower portion to the upper portion via the outer diameter passage 453 through the flow hole 454, (420).

Next, referring to FIGS. 4 and 8, it can be seen that the angular adjustment unit 300 and the torch unit 400 are inserted into a narrow space of the workpiece 10. Referring to FIGS. 7A and 7B, the tilting type welding apparatus 1100 of the present invention is welded to a narrow space of the workpiece 10 while being supplied with the filler material 20.

Referring now to FIG. 9, a welded shape 12 can be seen in the workpiece 10 after completion of welding. The welded shape 12 is formed such that the first rotary arm 320 and the second rotary arm 330 of the angle adjuster 300 are tilted at a certain angle and the electrode holder 420 is also tilted at a predetermined angle So that the electrode rod 500 can change the angle even in a narrow space of the welding target material 10, which is possible.

By using two rotating arms, the angle at which the electrode rod holder 420 can be tilted is further improved. In the embodiment of the present invention, the tilting angle may be preferably ± 10 ° with respect to the vertical axis of the electrode rod holder 420. Referring to FIGS. 6A and 6B, the saddle 240 may be larger according to the distance between the front and rear sides of the screw bar 230. This can be selectively changed depending on the width of the narrow space of the workpiece to be welded.

[Second Embodiment]

FIG. 10 is a front view of an embodiment of a rotary welding apparatus according to the present invention, FIG. 11 is a partial cross-sectional view of the invention shown in FIG. 10, FIG. 12 is a view of a prototype of the invention shown in FIG. 10, Fig. 14 is a view showing a welded state of a workpiece to be welded according to the invention shown in Fig. 10; Fig.

10-14, an embodiment of a tilting type welding apparatus 1200 of the present invention may include a torch frame 610, an electrode rod holder 620, a tilting rod 640, and a driving unit 641 have.

The torch frame 610 may be connected to a moving device of the welding facility as in FIG. 11, the fixing pin 40 is fixedly connected to the connection bracket 30 of the welding equipment, and the upper extension portion 612 is inserted and fixed to the inside of the welding facility. The upper portion 610b and the lower portion 610a of the torch frame 610 may be bolted together and the upper portion 610b may be processed to reduce the weight of the torch frame 610. [

The electrode rod holder 620 may be provided at an angle? 2 and may be disposed at the center of the lower end of the torch frame 610. Referring to the enlarged view of FIG. 11, it can be seen that the electrode rod 700 is slantly mounted on the electrode mounting portion 621. The inclination of the electrode mounting portion 621 may be 30 ° ± 1 ° with respect to the horizontal axis. This is to ensure a range of rotation of the electrode rod 700 mounted obliquely with rotation of the electrode mounting portion 621.

At this time, the inclined angle of the electrode rod 700 mounted with respect to the vertical axis may be? 1. If the electrode mounting portion 621 rotates within a predetermined range in the circumferential direction, the electrode rod 700 can rotate by an angle of? 1.

In the embodiment of the present invention, preferably, the angle of? 1 may be ± 15 °. However, the present invention is not necessarily limited to this, but may be applied at various angles depending on the size of a narrow space of the workpiece to which the rotary type welding apparatus 1200 of the present invention is applied.

The tilting rod 640 may be inserted and fixed at the center of the torch frame 610 and the lower end of the tilting rod 640 may be connected to the electrode rod holder 620. The driving unit 641 may be connected to the tilting rod 640 to rotate the tilting rod 640 and may be disposed on a welding facility.

The driving unit 641 may include a stepping motor 641 and a timing belt (not shown) connected to the shaft of the stepping motor 641 at one side and to the upper end of the rotating rod 640 at the other side . When the user operates the stepping motor 641, the shaft rotates within a certain angle range, and when the timing belt is operated, the rotation path rotates within a certain range.

The electrode rod holder 620 attached to the lower end of the tilting rod 640 also rotates together with the electrode rod 700. The electrode rod 700 moves left and right corresponding to the narrow space of the workpiece to be welded.

Next, an embodiment of the present invention further includes a gas spraying unit 630 for spraying an inert protective gas such as argon gas to the periphery of the electrode rod 700 when the electrode rod 700 is operated, and the gas spraying unit 630 May include a gas flow path 631, a gas chamber 632, and a diffusion filter 633.

The gas channel 631 may be connected to the gas supply unit 630a and may be formed inside the torch frame 610. [ A joint 639, which can be connected to the protective gas hose, may be mounted on the upper end of the gas passage 631. A protective gas hose is connected to the joint 639 and a protective gas is supplied from the gas supply unit 630a to the gas chamber 632. [

The gas chamber 632 may be formed in the lower portion 610a of the torch frame 610 and connected to the gas channel 631. [

Next, the diffusion filter 633 may be disposed below the gas chamber 632 such that the protective gas is uniformly injected into the periphery of the electrode rod 700. The diffusion filter 633 may be provided in a U-shape.

Inert protective gas such as argon gas supplied from the gas supply unit 630a flows into the gas chamber 632 through the gas passage 631. [ The diffusion filter 633 is accumulated in the gas chamber 632 under the resistance of the diffusion filter 633 and is concentrated in the gas chamber 632 by a predetermined amount. The inert protective gas is diffused in a fan shape and is sprayed to the periphery of the electrode rod 700. [

At both ends of the lower portion 610a of the torch frame 610 where the gas chamber 632 is formed, the outer cutout portion 625 is cut at a predetermined angle so that the spraying range of the protective gas is enlarged to the peripheral portion of the electrode rod 700. [ Can be formed.

The inner cutout portions 613 and 615 are formed at the center of the lower portion 610a of the torch frame 610 in which the gas chamber 632 is formed and the inner cutouts 613 and 615 are formed in the direction opposite to the advancing direction of the electrode rod 700 The advancing-side inner cut-out portion 615 of the electrode rod 700 can be provided further than the advancing-direction inner cut-out portion 613 of the electrode rod 700 so as to expand the injection amount of the protective gas.

This is to prevent the activity due to the spark which may occur in the material to be welded on the rear side of the electrode rod 700 after the welding operation. Since the activity of the molten welded material is frequently generated at the welded portion by the electrode rod 700, the degree of incision of the inner cutout portion 615 in the direction opposite to the traveling direction of the electrode rod 700 is increased, To be sprayed.

10, the cutting angle? 2 of the inner cutout portion 615 in the direction opposite to the advancing direction of the electrode rod 700 is larger than the cutting angle? 1 of the advancing direction side inner cutout portion 413 of the electrode rod 700 Can be seen. Due to the difference in the angle of incision, the range of injection of the protective gas is different.

Since the protective gas is formed into a fan shape by the outer cutout 625 and the inner cutouts 613 and 615 and is sprayed to the periphery of the workpiece and the electrode rod 700, .

The cooling unit 650 may be provided to cool the working electrode 700. The cooling unit 650 may include an inner diameter passage 654, an outer diameter passage 653, and a flow hole 654 And the like.

The inner diameter channel 654 may be connected to the cooling water supply unit 651 and disposed at the inner center of the electrode rod holder 620. The outer diameter passage 653 may be formed between the inner diameter passage 654 and the inner portion of the electrode rod holder 620. The flow hole 654 may be formed in the lower portion of the electrode rod holder 620 to connect the inner diameter passage 654 and the outer diameter passage 653.

The cooling water supplied from the cooling water supply portion moves from the upper portion to the lower portion through the inner diameter passage 654 and passes from the lower portion to the upper portion via the outer diameter passage 653 through the flow hole 654, (620).

Referring now to FIG. 13, there is shown a state in which a tilting type welding apparatus 1200 according to the present invention is mounted on a moving device of a welding facility and is supplied with a filler material 20 to enter a narrow space of a material to be welded 10. Thereafter, the welding operation proceeds, and after welding is completed, the welded shape 13 can be seen as in Fig. In the welded shape 13, the rotating rod 640 is rotated by the driving unit 641, and the electrode rod holder 620 disposed at the lower end of the rotating path rotates within a certain angle range, do.

That is, since the tungsten electrode rod 700 mounted on the mounting portion 621 of the electrode holder 620 can be rotated by ± Φ1 with respect to the vertical axis, the tungsten electrode rod 700 can be moved in accordance with the width of the narrow space of the welding target material 10 Thus, the welding can be completed without a welded portion.

The above items are only specific examples of the welding apparatus.

Therefore, it should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. do.

[First Embodiment]
100: Device body 200:
210: drive motor 220: connection bracket
221: engaging portion 223:
225: shaft hole 230: screw bar
240: Saddle 300: Angle adjusting part
310: support rod 320: first circular arc
330: The 2nd synagogue 400: Tochibu
410: Torch frame 411:
413: first inner cut section 415: second inner cut section
430: gas jetting part 431: gas flow path
432 gas chamber 433 diffusion filter
450: Cooling section 451: Cooling water supply section
452: inner diameter passage 453: outer diameter passage
454: Flow hole 500: Electrode
1100: Tilting type welding machine
[Second Embodiment]
610: torch frame 611: first inner cutout
613: second inner cutout portion 625: outer cutout portion
620: Electrode holder 621: Electrode mounting part
630: gas jetting part 631: gas flow path
632 gas chamber 633 diffusion filter
640: Rotating rod 641:
650: cooling section 651: cooling water supply section
652: inner diameter channel 653: outer diameter channel
654: Flow hole 700: Electrode
1200: Rotating type welding device

Claims

A device body connected to the moving device of the welding plant;
A driving unit fixed to the apparatus body;
An angle adjusting unit interlocked with the driving unit and rotated at a predetermined angle; And
And a torch part connected to the angle adjusting part and having a welding angle of the electrode rod adjusted according to the movement of the angle adjusting part,
The driving unit includes:
A drive motor having a shaft;
A connection bracket having a coupling portion connected to a lower portion of the apparatus body on one side and a mounting portion on which the driving motor is coupled on the other side and a shaft hole formed on a center side of the mounting portion;
A screw bar connected to the shaft of the drive motor inserted into the shaft hole; And
And saddles disposed on the screw bar and provided to move the screw bar as the shaft rotates,
The saddle is connected to the screw bar in a ball-screw manner and is provided in a Y-shape. A ball support is disposed inside the upper portion of the saddle, and a plurality of rolling balls are disposed in the ball support. Tilting type welding equipment.

delete

The method according to claim 1,
Wherein the angle-
A support rod connected to a lower portion of the apparatus body;
A first rotary arm fixed to the saddle and at least partially connected to the support rod by a hinge so as to be rotatable at a predetermined angle in accordance with the movement of the saddle; And
A U-shaped second rotary arm connected to the first rotary arm by a connection pin and at least partially connected to the support rod by a hinge so as to be rotatable at an angle according to the movement of the first rotary arm;
Wherein the tilting-type welding apparatus includes a tilting-type welding apparatus.

The method of claim 3,
The torch portion
A torch frame connected to the first and second rotary shafts by bolts; a hinge connected to the center of the second rotary shafts; And
An electrode rod holder disposed at a central portion of the torch frame and coupled to an electrode rod at a lower end portion thereof;
Wherein the tilting-type welding apparatus includes a tilting-type welding apparatus.

5. The method of claim 4,
The torch portion may further include a gas injecting portion injecting a protective gas into a peripheral portion of the electrode when the electrode rod operates,
A gas flow channel connected to the gas supply unit and formed inside the upper portion of the torch frame; And
A gas chamber formed in a lower portion of the torch frame and connected to the gas flow channel;
Wherein the tilting-type welding apparatus includes a tilting-type welding apparatus.

6. The method of claim 5,
Wherein the gas injection unit further comprises a diffusion filter disposed at a lower portion of the gas chamber so that the protective gas is uniformly injected into the periphery of the electrode rod.

6. The method of claim 5,
Wherein an outer cutout portion is formed at both sides of the lower portion of the torch frame in which the gas chamber is formed such that an injection range of the protective gas is increased to the peripheral portion of the electrode rod.

6. The method of claim 5,
An inner cut portion is formed on a lower center side of the torch frame in which the gas chamber is formed and the inner cut portion of the electrode in the direction opposite to the advancing direction of the electrode rod advances the electrode rod so that the advancing direction of the electrode rod is larger than the advancing direction of the electrode rod. Side inner cutout portion of the tilting-type welding apparatus.

9. The method according to any one of claims 4 to 8,
The torch portion may further include a cooling portion for cooling the working electrode rod,
An inner diameter channel connected to the cooling water supply unit and disposed at an inner central portion of the electrode rod holder;
An outer diameter channel formed between the inner diameter channel and the inner portion of the electrode rod holder; And
A flow hole connected between the inner diameter passage and the outer diameter passage;
Wherein the cooling water flows through the inner diameter passage and flows out through the outer diameter passage.