KR101783120B1 - Welding device - Google Patents
Welding device Download PDFInfo
- Publication number
- KR101783120B1 KR101783120B1 KR1020160005516A KR20160005516A KR101783120B1 KR 101783120 B1 KR101783120 B1 KR 101783120B1 KR 1020160005516 A KR1020160005516 A KR 1020160005516A KR 20160005516 A KR20160005516 A KR 20160005516A KR 101783120 B1 KR101783120 B1 KR 101783120B1
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- KR
- South Korea
- Prior art keywords
- electrode rod
- gas
- welding
- tilting
- torch
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/26—Accessories for electrodes, e.g. ignition tips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/28—Supporting devices for electrodes
- B23K9/29—Supporting devices adapted for making use of shielding means
- B23K9/291—Supporting devices adapted for making use of shielding means the shielding means being a gas
- B23K9/296—Supporting devices adapted for making use of shielding means the shielding means being a gas using non-consumable electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
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
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.
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
First, the
The driving
First, the connection bracket 220 is formed with a
1 and 2, the
The mounting
A
The
The
1 and 3, the
Next, the
First, the
One end of the first
One end of the second
The end of the
When the driving
At this time, according to the movement of the
The
The
The
5, the gas injection unit 430 may be provided to inject a protective gas into the periphery of the
The
The
Inert protective gas such as argon gas supplied from the
At both ends of the
The
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
3, the cutting angle? 2 of the
Since the protective gas is formed into a fan shape by the
The
The
The cooling water supplied from the cooling water supply unit moves from the upper portion to the lower portion through the
Next, referring to FIGS. 4 and 8, it can be seen that the
Referring now to FIG. 9, a welded
By using two rotating arms, the angle at which the
[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
The
The
At this time, the inclined angle of the
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
The tilting
The driving
The
Next, an embodiment of the present invention further includes a
The
The
Next, the
Inert protective gas such as argon gas supplied from the
At both ends of the
The
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
10, the cutting angle? 2 of the
Since the protective gas is formed into a fan shape by the outer cutout 625 and the
The
The
The cooling water supplied from the cooling water supply portion moves from the upper portion to the lower portion through the
Referring now to FIG. 13, there is shown a state in which a tilting
That is, since the
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
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
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 (9)
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.
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 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.
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.
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.
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.
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.
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.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020160005516A KR101783120B1 (en) | 2016-01-15 | 2016-01-15 | Welding device |
Applications Claiming Priority (1)
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KR1020160005516A KR101783120B1 (en) | 2016-01-15 | 2016-01-15 | Welding device |
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KR20170085857A KR20170085857A (en) | 2017-07-25 |
KR101783120B1 true KR101783120B1 (en) | 2017-10-23 |
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KR1020160005516A KR101783120B1 (en) | 2016-01-15 | 2016-01-15 | Welding device |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20230000775U (en) * | 2021-10-13 | 2023-04-20 | 두산에너빌리티 주식회사 | Angle adjustable welding torch |
-
2016
- 2016-01-15 KR KR1020160005516A patent/KR101783120B1/en active IP Right Grant
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20230000775U (en) * | 2021-10-13 | 2023-04-20 | 두산에너빌리티 주식회사 | Angle adjustable welding torch |
KR200497058Y1 (en) * | 2021-10-13 | 2023-07-12 | 두산에너빌리티 (주) | Angle adjustable welding torch |
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KR20170085857A (en) | 2017-07-25 |
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