KR20190049130A - TIG welding machine and its teig welding method - Google Patents

Abstract

Provided are a TIG welding device and a TIG welding method thereof, wherein the TIG welding device includes and is rotated by a rotating means wherein an arc surface is cooled when an electrode is welded to increase an amount of penetration due to arc contraction by rotating the electrode rod during welding, to realize a fine structure by stirring the melt due to the rotation of the electrode rod, and to realize miniaturization of the structure by contracting the arc due to a thermal pinch effect and stirring the melt. Therefore, a welding speed is capable of being increased, productivity can be improved, the basic material is not additionally required for improvement work, and high reliability can be secured due to an increase in physical property value.

Description

[0001] TIG WELDING APPARATUS AND TIG WELDING METHOD [0002]

The present invention relates to a tig welding, and more particularly, to a tig welding apparatus for increasing the amount of penetration due to arc contraction due to rotation of an electrode rod during welding, as well as a micro- And a method of welding the same.

In general, TIG welding is one of high-quality welding methods because of non-small arc arc welding, stable arc, excellent mechanical properties and small strain.

Such a tig welding uses an inert gas (Ar or He) to cause an arc with the base material by using a tungsten electrode (hereinafter referred to as "electrode") having the highest melting point of the metal (about 3400 ° C.) Thereby protecting the welded portion and the tungsten electrode rod.

4, an electrode rod 120 is provided at an inner center of the nozzle 110, and an inert gas is supplied between the electrode rod 120 and the inside of the nozzle 110 . At this time, the arc formation (A) between the electrode rod (120) and the base material (200) is relatively widely distributed and the amount of penetration (B) is also penetrated into a wide area.

The electrode rod is fixed in such a manner that the electrode rod is inserted into the collet body / chuck by using a screw and the electrode rod is fixed by using the torch cap.

Since the welded part is surrounded by inert gas, such a tig welding is advantageous not only in preventing the oxidation reaction by preventing the contact between the molten metal and air, but also because it is excellent in mechanical properties and does not generate solvent, slag and spatter. It has the advantage of not needing.

In addition, since the arc is stable, the heat concentration effect is good, the penetration and the deformation of the welded part are less, and the protective gas is transparent, so that the operator can grasp the welding situation accurately and also the welded portion can be obtained without using the welding rod in the thin plate It also has the advantage of being.

As described above, in the prior art related to the tig welding, the replacement of the welding equipment can be performed without lifting the entire welding apparatus from the rails, as disclosed in Korean Utility Model Registration No. 20-0440426 (hereinafter referred to as "Prior Art Document 1" A technique such as a torch rotating device of a pipe welding apparatus which rotatably moves the torch at a certain angle or fixes the torch so that the setting of the origin can be easily performed is simple.

In addition, as disclosed in Korean Patent Laid-Open Publication No. 10-2013-0112328 (hereinafter referred to as "Prior Art Document 2"), a welding torch is hinged to a hinge point so that weaving welding can be performed without interference with a base material in a narrow space Techniques such as a torch for welding a teg welding centered around have also been proposed.

In addition, as disclosed in Korean Patent Registration No. 10-1473663 (hereinafter referred to as "Prior Art Document 3"), it is easy to adjust the position of the welding head and the electrode rod constituting the welding torch to an angle required A technique such as a welding torch for a tig welding machine capable of maintaining the same distance at all times with the electrode and the welding tig also has been proposed.

These prior art documents 1 and 2 eliminate the technique of rotating the torch at a predetermined turning radius according to the welding operation condition or the welding position in the course of performing the tig welding.

Korean Utility Model Registration No. 20-0440426 Korean Patent Publication No. 10-2013-0112328 Korean Registered Patent No. 10-1473663

However, the conventional conventional tig welding or the above-mentioned TIG welding in the prior art documents 1 to 3 has a disadvantage in that the electrode is often contaminated during the welding process, and the welding speed is slow, as well as the welding amount is small.

In addition, TIG welding has a disadvantage that high-quality welding is performed only by skilled welders having a long career.

In order to solve the above-described problems, it is a specific object of the present invention to provide a method of manufacturing a microstructure by rotating an electrode rod during welding to increase the amount of penetration due to arc shrinkage, And to provide a method of welding the same.

Another specific object of the present invention is to make it possible to adjust the number of revolutions of the electrode rod according to the welding conditions and the thickness of the base material.

According to an aspect of the present invention, there is provided a plasma processing apparatus including an electrode disposed at an inner center of a nozzle, an inert gas being supplied between the electrode and the nozzle to prevent oxidation, Wherein the electrode rod is rotated by a rotating means so as to cool the arc surface during welding so that arc shrinkage due to a thermal pinch effect and stirring of the melt can realize miniaturization of the structure do.

The rotation means may include an electric motor that is mounted to rotate within the nozzle or outside of the nozzle with the upper end of the electrode rod mounted thereon, a switch provided to turn on or off the electric motor, .

And an inert gas supply nozzle provided at an outer side of the nozzle with an inert gas supply passage spaced apart from an outer surface of the nozzle so as to supply an inert gas for shielding air from the welding portion.

Rotating the electrode rod provided at the center of the nozzle by a switch operation to perform welding; Adjusting the rotational force when the electrode is rotated to perform welding; And secondarily supplying an inert gas to the outside of the nozzle to cut off the outside air when the electrode is rotated by welding.

The adjustment of the rotational force is selectively adjusted according to the welding condition or the thickness of the base material to be welded.

The present invention can increase the amount of penetration due to arc shrinkage by rotating the electrode rod during welding, and realize a fine structure by stirring the molten metal with rotation of the electrode rod, thereby improving the welding speed and productivity And it is possible to secure high reliability due to an increase in the physical property value.

In addition, since the number of revolutions of the electrode rod can be adjusted according to the welding conditions and the thickness of the base material, it is possible to smoothly perform the tig welding under the optimum conditions and also to have the effect of welding with improved quality.

FIG. 1 is a conceptual diagram for explaining the present invention,
FIG. 2 is a reference diagram for explaining the use state according to FIG. 1;
3 is a block diagram for explaining the welding method of the present invention,
4 is a conceptual diagram for explaining a conventional tig welding machine.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The present invention is not limited to the embodiments.

FIG. 1 is a conceptual diagram for explaining the present invention, and FIG. 2 is a reference diagram for explaining a use state according to FIG.

As is well known, the TIG welding apparatus 100 is provided with an electrode rod 120 in the center of the nozzle 110, and an inert gas is interposed between the electrode rod 120 and the inside of the nozzle 110 The arc is generated by welding the base material 200 with the gas supply structure.

As described in the problem to be solved, the conventional tig welding has a disadvantage in that the electrode is frequently contaminated during the welding process, and the welding speed is slow as well as the welding amount is small.

In addition, the tig welding has a disadvantage that high-quality welding is performed only by a skilled welder having a long career.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a method of manufacturing a microstructure capable of increasing the amount of penetration due to arc shrinkage by rotating an electrode rod during welding, There is.

In the tig welding apparatus 100 according to the present invention, the arc surface due to the thermal pinch effect and the melt are stirred by cooling the arc surface when the electrode 120 is welded, (10). At this time, the rotation of the electrode rod is rotated at high speed.

In other words, the arc surface is cooled due to the high speed rotation of the electrode rod with the inert gas together with the inert gas, so that as the arc is contracted due to the thermal pinch effect, that is, arc formation (A) ) Can be increased.

That is, the heat of the arc surface is lowered by moving the flow of the gas due to the rotation of the arc surface, and furthermore, the arc must be continuously discharged, and the area is reduced and the density of the arc is increased. As a result, the length of the arc becomes longer and the amount of penetration increases due to the reason that the penetration deepens.

This has the condition that the number of multi-layer welding can be reduced in the end, and therefore the welding time as well as the welding time can be remarkably shortened.

Further, the rotation of the electrode rod causes the molten material to be continuously stirred, and thereby the structure becomes finer. As a result, the welding depth is increased and the physical properties (mechanical properties) are increased, so that the welding speed can be rapidly increased.

This also improves the efficiency of the welding operation and can also provide a condition for securing high reliability on the welded portion.

Accordingly, the present invention is not limited to a complicated technical structure, but may be applied to an arc welding process by rotating an electrode rod during a tig welding process, thereby cooling the arc surface due to the rotation of the electrode rod to provide a thermal pinch effect, As the melt rotates, the agitation is activated, the structure becomes fine, the depth of penetration increases, and the physical properties are also increased, so that the welding speed can be rapidly performed.

The rotating means 10 includes a conventional electric motor 12 which is mounted such that the upper end of the electrode rod 120 is mounted in the nozzle 110 or outside the nozzle 110 by a conventional method, A switch 12 provided to turn on or off the electric motor 12 and an adjusting part 16 to which a conventional control method of controlling the rotational speed of the electric motor 12 is applied.

It is preferable that the electric motor 12 be mounted on the side of the torch cap which fixes a conventional shield cap internal electrode rod of the tig welding apparatus 100 (not shown). When the electric motor is installed outside the tig welding apparatus, it may be fixed by a conventional bracket or a housing.

In addition, it is preferable that the power to the electrode rod is supplied from a power source connected to the electric motor by a conventional method.

The rotation speed of the electric motor is controlled by controlling the rotation speed of the electrode. It is preferable that the rotation speed is adjusted according to the working conditions and the thickness of the base material to be welded so as to appropriately control the amount of penetration.

Accordingly, the work of improving the base material may not be necessary, but the butt welding may also be possible. In other words, by having deep penetration in conventional teig welding with low welding amount and low welding speed, it is possible to reduce the number of passes in the tig welding, to bring the welding speed quickly, and to improve productivity Lt; / RTI >

Meanwhile, an inert gas supply path 22 is provided outside the nozzle 110 at a predetermined interval from the outer surface of the nozzle 110 so as to supply inert gas for shielding air to the welding part at the time of welding And an inert gas supply nozzle (20).

The inert gas supplied to the inside of the nozzle 110 forms a vortex due to rotation of the electrode rod, whereby external oxygen can be introduced. Therefore, in an embodiment of the present invention, an inert gas is additionally supplied to the outside of the nozzle, thereby solving the problem caused by external air contact.

That is, since the inert gas supplied through the nozzle and the inert gas supplied by the inert gas supply nozzle are prevented from being in contact with the outside air, the quality of the welded part can be maximized, It has a condition that can be prevented.

3 is a block diagram for explaining the welding method of the present invention.

As shown in the figure, a method of welding a teg using the welding apparatus of the present invention is also disclosed.

(S1) of performing the welding by rotating the electrode rod provided in the center of the nozzle by the switch operation is performed. At this time, an inert gas is also supplied through the nozzle to perform welding.

As described above, when the electrode rod is rotated in the tig welding, the arc surface is cooled and the thermal pinch effect is obtained as described above. As the arc is contracted, the effect of increasing the amount of penetration and the stirring effect are activated by the rotation of the melt. As the depth of penetration is increased and the physical properties are increased, the welding speed can be rapidly increased.

And, when the welding is performed by rotating the electrode, a step S2 of adjusting the rotational force is performed. That is, the rotational force can be appropriately adjusted appropriately according to the welding condition or the thickness of the base material to be welded. This is one of the important factors determining the amount of penetration above the weld.

In addition, the method further includes the step (S3) of supplying the inert gas to the outside of the nozzle in order to cut off the external air when the electrode is rotated by welding.

In other words, the inert gas is primarily supplied through the nozzle, and the inert gas is supplied again from the outside of the nozzle to the outside again, so that the external air is prevented from being introduced onto the welding portion, thereby improving the quality of the welding portion But also conditions that can prevent oxidation at the source.

Thus, the method of the present invention can not only maximize the efficiency of the welding operation, but also improve the quality of the welded portion, thereby securing high reliability.

10: rotating means 12: electric motor
14: switch 16:
20: inert gas supply nozzle 22: inert gas supply path
100: TIG welding machine
110: nozzle 120: electrode
200: base metal

Claims (5)

A tig welding apparatus for welding a base material with an arc by providing an electrode rod at an inner center of the nozzle and supplying an inert gas between the electrode rod and the inside of the nozzle to prevent oxidation,
Wherein the electrode rod is rotated by rotating means to cool the arc surface during welding and to shrink the arc due to a thermal pinch effect and to stir the melt to realize miniaturization of the structure. The method according to claim 1,
The rotation means may include an electric motor that is mounted to rotate within the nozzle or outside of the nozzle with the upper end of the electrode rod mounted thereon, a switch provided to turn on or off the electric motor, And a tug welding device including a portion. 3. The method according to claim 1 or 2,
And an inert gas supply nozzle provided at an outer side of the nozzle with an inert gas supply path spaced apart from an outer surface of the nozzle so as to supply an inert gas for shielding air from the welding part during welding, Device. Rotating the electrode rod provided at the center of the nozzle by a switch operation to perform welding;
Adjusting the rotational force when the electrode is rotated to perform welding; And
And secondarily supplying an inert gas to the outside of the nozzle to cut off the outside air when welding the electrode by rotating the electrode rod. 5. The method of claim 4,
Wherein the adjustment of the rotational force is selectively controlled according to a welding condition or a thickness of a base material to be welded.

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