KR20140061324A - Welding tip and manufacturing method thereof - Google Patents

Welding tip and manufacturing method thereof Download PDF

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Publication number
KR20140061324A
KR20140061324A KR1020140002545A KR20140002545A KR20140061324A KR 20140061324 A KR20140061324 A KR 20140061324A KR 1020140002545 A KR1020140002545 A KR 1020140002545A KR 20140002545 A KR20140002545 A KR 20140002545A KR 20140061324 A KR20140061324 A KR 20140061324A
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KR
South Korea
Prior art keywords
welding
welding tip
coating
tip
hollow
Prior art date
Application number
KR1020140002545A
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Korean (ko)
Inventor
오인록
Original Assignee
(주)동화웰딩
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Publication date
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Priority to KR1020140002545A priority Critical patent/KR20140061324A/en
Publication of KR20140061324A publication Critical patent/KR20140061324A/en

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    • 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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261—Rods, electrodes, wires
    • B23K35/0272—Rods, electrodes, wires with more than one layer of coating or sheathing material
    • 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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • 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
    • B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
    • B23K9/124—Circuits or methods for feeding welding wire
    • 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
    • B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
    • B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
    • 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

The present invention relates to a welding tip for supporting a welding wire, which is a welding rod in the form of a wire during a welding operation, and drawing the welding wire into a welding portion. More particularly, the present invention relates to a welding tip such as copper, chromium alloy copper (CrCu), chromium zirconium copper The outer surface of the welding tip made of the same copper or copper alloy is coated with a cost-wearing coating so that the spatter, which is generated during welding, is prevented from being welded to the welding tip. A welding tip and a method of manufacturing the welding tip.
Further, the present invention can reduce the heating of the holding part due to the welding heat applied to the holding part at the time of welding by coating the outside of the holding part by the non-coated coating, thereby preventing the hollow expansion due to the expansion of the welding tip ; As a result, the replacement period of the welding tip is extended to improve the workability and improve the economical efficiency; Particularly, it is possible to improve the surface hardness of the welding tip so as to prevent the spatter splattering on the welding tip from being welded to the surface of the welding tip, so that the current intensity or the voltage variation caused by the welding of the spatter to the welding tip It is possible to obtain the effect of solving the problem of the deterioration of the welding quality.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a welding tip and a manufacturing method thereof,

The present invention relates to a welding tip for supporting a welding wire, which is a welding rod in the form of a wire during a welding operation, and drawing the welding wire into a welding portion. More particularly, the present invention relates to a welding tip such as copper, chromium alloy copper (CrCu), chromium zirconium copper The outer surface of the welding tip made of the same copper or copper alloy is coated with a cost-wearing coating so that the spatter, which is generated during welding, is prevented from being welded to the welding tip. A welding tip and a method of manufacturing the welding tip.

Welding refers generally to a technique of applying heat, pressure, or heat and pressure to metal materials separated from each other at the same time. The fusion welding is performed by locally heating the joints of the members themselves, And pressure welding where it is properly heated and attached.

Generally, narrow welding refers to the above-mentioned welding. In this welding, a welding wire (welding wire) is supplied at a constant speed and an arc welding portion between the end of the welding wire and the base material is melted and welded. There is a way.

The following are representative prior art techniques for welding tips.

Korean Utility Model No. 20-2009-0006324 discloses a welding tip for an arc welding torch wherein a welding wire is inserted into a through hole of a welding wire formed in the inside thereof, And a protective gas supply hole is formed in parallel with the welding wire through-hole so as to be spaced apart from each other at a predetermined interval and supplied with a protective gas. Thus, regardless of the shape of the improvement and the thickness of the welding base material, However, since the problem caused by the spatter sticking to the welding tip is insufficiently solved, there is a need for continuous research and development for solving the problem.

The present invention is directed to improving the problems of the conventional welding tips. The conventional welding tips are made of copper or copper alloy such as copper (Cu), chromium alloy copper (CrCu), or chromium zirconium copper (CrCuZr) In particular, the tip of the welding tip is heavily heated by the welding heat, and in particular, the hollow portion of the tip is expanded by heating to penetrate through the hollow of the welding tip and the welding line supplied to the welding portion is shaken, As a result, there was a problem that the welding could not be performed smoothly;

For smooth welding, it is necessary to frequently replace the welding tip with the extended hollow, resulting in poor workability and poor economical efficiency;

In the case of a welding tip used in an electric welding method, a spark-shaped spatter generated when a welding wire is melted and welded to an object to be welded is welded to the outside of the welding tip, and the deposited spatter And the quality of the welding is deteriorated by influencing the strength or the voltage. Accordingly, the main object of the present invention is to provide a solution to this problem.

The present invention has been made to solve the above-

A fastening part which penetrates the welding line with the hollow formed at the center in the longitudinal direction and is fastened to a supply line formed with a thread and supplying the welding line; And a holding part extending from the fastening part and penetrating the welding line with the hollow formed at the center in the longitudinal direction in the form of being ventilated with the hollow of the fastening part and having a tapered shape outside the part of the end part opposite to the fastening part Wherein the holding part is coated with a non-spun coating material of a metal material having a melting point higher than that of a metal material constituting the holding part, thereby forming a coating layer;

A cleaning step of cleaning the emulsion attached to the surface of the metal material welding tip; A coating step of removing water from the cleaning process-treated welding tip, drawing it into the coating chamber, and then sequentially performing heating, coating and cooling treatment to coat the non-coated coating on the welding tip; And a water washing step of taking out the coated welding tip from the coating chamber and washing it with water.

The spatter-free welding tip of the present invention as described above is coated with the outer portion of the holding portion by a non-spun coating material of a metal material having a melting point higher than that of the metal material constituting the holding portion, It is possible to reduce the heating of the holding part by the heat and to prevent the hollow expansion due to the expansion of the welding tip;

As a result, the replacement period of the welding tip is extended to improve the workability and improve the economical efficiency;

Particularly, it is possible to improve the surface hardness of the welding tip so as to prevent the spatter splattering on the welding tip from being welded to the surface of the welding tip, so that the current intensity or the voltage variation caused by the welding of the spatter to the welding tip It is possible to obtain the effect of solving the problem of the deterioration of the welding quality.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a spatter cost wearing welding tip according to a preferred embodiment of the present invention; Fig.
2 (a) to 2 (b) are cross-sectional views showing a spatter cost wearing welding tip according to a preferred embodiment of the present invention.
FIG. 3 is a perspective view showing a fastening state between a spatter-cost-wearing welding tip and a supply line according to a preferred embodiment of the present invention; FIG.
4 is a block diagram showing a process sequence of a method for manufacturing a spatter-cost-wearing welding tip according to a preferred embodiment of the present invention.

The present invention relates to a welding tip for supporting a welding line (50) which is a welding electrode in the form of a wire during a welding operation and which is drawn out to a welding portion.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[ Spatters  Cost worn Welding tips ]

The present invention comprises a fastening portion 10 which penetrates through a weld line 50 with a hollow 30 formed at the center in the lengthwise direction and which is fastened to a supply line 60 formed with a thread and supplying a weld line 50; The weld line 50 is passed through the hollow 30 formed at the center in the longitudinal direction in such a manner as to extend from the fastening part 10 and to be ventilated with the hollow 30 of the fastening part 10, And the holding portion 20 includes a holding portion 20 having a tapered shape. The holding portion 20 is made of a metal material having a melting point higher than that of the metal material constituting the holding portion 20 To a spatters cost worn welding tip that is configured to be coated with a cost-effective coating to form a coating layer (40).

2, the fastening part 10 has a hollow 30 formed at the center in the lengthwise direction, penetrates the weld line 50, and is connected to a supply line 60 for forming a thread and supplying the weld line 50, The welding tip is securely fixed to the supply line 60 and the welding wire 50 is supplied to the tip of the welding tip.

That is, the supply line 60 is a general construction in which the welding tip of the welding apparatus is mounted, and the welding line 50 is supplied to the hollow 30 of the welding tip with the welding tip mounted.

2 (a), a thread is formed on the outer periphery of the fastening portion 10 of the cylindrical block having the hollow 30, and the fastening portion 10 is formed in the hollow 30 The outer periphery of the threaded portion is fastened to the inner periphery of the nut-shaped supply line 60. When the fastening portion 10 is in the shape of a bolt having a circular hollow shape as shown in FIG. 2 (b) When the threaded portion is formed in the inner periphery of the fastening portion 10 of the cylindrical block having the threaded portion 30 and the fastening portion 10 is formed in the shape of a nut having the hollow 30, (60).

1, the holding part 20 extends from the coupling part 10 and is hollowed with the hollow 30 of the coupling part 10, 50, and the outside of a part of the end portion opposite to the fastening portion 10 is configured in a tapered shape, and corresponds to the tip of the welding tip.

That is, the holding part 20 is configured to supply the welding line 50 to the welding part of the workpiece to be welded by receiving the welding line 50 through the hollow 30 connected to the hollow 30 of the coupling part 10, And the welding wire 50 extending through the hollow 30 is drawn out from the other side of the coupling part 10. At this time, it is preferable that the hollow 30 formed in the holding part 20 is constructed so that the weld line 50 is brought into close contact with the hollow 30 so that the shrinkage is minimized.

 As shown in FIG. 2, the outside of the holding part 20 may be formed in any shape as long as a certain part of the one side adjacent to the coupling part 10 can correspond to the coupling part 10, Is preferably formed in a tapered shape such that the tip end thereof has a narrow shape. That is, a part of the other side of the tapered holding part 20 exerts an effect that the weld line 50 drawn out from the welding tip can be easily aimed at the welding part of the workpiece.

A plurality of stepped portions are provided on a certain portion of one side of the holding portion 20 or a certain portion of one side of the holding portion 20 and a predetermined portion of the other side of the tapered shape, A tool such as a spanner can be fastened or released so that the tool 60 can be easily pivoted or released.

The fastening portion 10 and the holding portion 20 may be made of a general welding tip material according to the judgment of a person skilled in the art and more preferably made of copper, chromium alloy copper (CrCu) or chromium zirconium copper (CrCuZr ) Made of copper or copper alloy.

The coating layer 40 is coated on the holding part 20 by a coating material of a metal material having a melting point higher than that of a metal material constituting the holding part 20, The holding portion 20 can be prevented from being heated by the welding heat applied to the holding portion 20 and prevented from being welded to the holding portion 20 by spattering at the time of welding.

In other words, the conventional general weld line 50 has a similar shape to that of the workpiece, though it varies depending on the type of the workpiece, and is mostly welded by welding heat of 400 to 500 ° C. At this time, most of the molten material produced by melting the weld line 50 by the welding heat is welded to the welded material to form a welded portion. However, the molten material is not normally welded to the welded material, Causing problems to be welded.

The spatter as described above is welded to the workpiece to reduce the completeness of the weld, and the spatter is welded to the weld tip, which causes a problem of deteriorating the function of the weld tip.

In particular, the spatter deposited on the welding tip further raises the temperature of the welding tip heated by the welding heat, and the continuously transferred weld line 50 through the hollow 30 of the heated welding tip expands the hollow 30 Causing the welded wire 50 to be drawn out to be shaken and to degrade the precision of the welding. In addition, in the welding method using electricity, the intensity of the current or voltage flowing through the welding line 50 is not instantaneously constant due to the spatter deposited on the welding tip, thereby further promoting the generation of the spatter, Falling problems could have occurred.

On the other hand, the coating layer 40 of the present invention is formed by coating the non-adherent coating material, which is a material having a melting point higher than that of the material of the material of the welding tip, on the holding portion 20, (The effect of improving the heat resistance of the welding tip), particularly preventing the outer portion of the welding tip from being smudged (the effect of raising the hardness outside the welding tip) so that the spatter is welded to the outside of the holding portion 20 which is the surface of the welding tip It is possible to obtain an effect of preventing the above-

That is, the coating layer 40 according to the present invention may be formed only on the outer side of the holding part 20, but may also be formed on the inner surface of the holding part 20 and through the hollow 30, Is heated by the welding heat and the heat of the heated welding line 50 is conducted to the inner surface of the hollow 30 to reduce the heating of the welding tip.

The non-spun coating material forming the coating layer 40 may be composed of various materials having higher melting heat than the metal material constituting the holding portion 20 of the welding tip according to the judgment of a person skilled in the art, but titanium, aluminum titanium, Titanium nitride, aluminum nitride, aluminum nitride, titanium nitride, aluminum nitride, titanium nitride, aluminum nitride, or silicon nitride. That is, the coating layer 40 formed by using the Tin-based metal or alloy as a non-cohesive coating has heat resistance against heat of about 600 to 1,200 ° C. to prevent the coating layer 40 from being dried, It is possible to realize the effect of preventing the holding portion 20 from being heated by the coating layer 40 and preventing the spatter from being welded.

When the non-coherent coating is composed of at least one of titanium, aluminum titanium, titanium nitride, titanium aluminum nitride, aluminum nitride, or silicon nitride, the coating layer 40 may be formed to a thickness of 1.0 to 5.0 μm, The coating layer 40 may be coated on the inner surface 20 of the holding portion 20 so that the coating layer 40 is easily peeled off by heat You can solve the problem. That is, when the thickness of the coating layer 40 is less than 1.0 탆, the thickness of the coating layer 40 is too thin to prevent the heating of the holding portion 20 by the coating layer 40 and to prevent the adhesion of the spatter If the thickness of the coating layer 40 is excessively thick, the coating layer 40 heated by the welding heat may be peeled off from the holding portion 20 having a material different from that of the coating layer 40 due to the difference in thermal conductivity. It is preferable to have a thickness within the above range.

[ Spatters  Cost worn Welding tips  Manufacturing method]

A method for manufacturing a spatter-free welding tip according to the present invention includes a cleaning step (S100) of cleaning an emulsion attached to a surface of a metal-made welding tip; A coating process (S200) for removing water from the welding tip treated in the cleaning process (S100), drawing it into the coating chamber, and then sequentially performing heating, coating and cooling processes to coat the non- ; And a water washing step (S300) of taking out the welding tip treated in the coating step (S200) from the coating chamber and washing it with water.

Specifically, the cleaning step (S100) is a step of cleaning the emulsion adhered to the surface of the metal material welding tip. The cleaning step (S100) The oil such as cutting oil, grinding oil or lubricating oil to be processed during cutting, grinding or hole machining (hollow 30 machining) of the metal working process is formed on the surface of the welding tip composed of the fastening portion 10 and the holding portion 20 .

In this case, the process of the cleaning process (S100) may be performed by washing the welding tip of the metal material having the surface of the oil agent once or more by using water, or by using various kinds of cleaning agents.

In addition, the coating step S200 removes water from the welding tip treated in the cleaning step (S100), draws it into the coating chamber, and then sequentially performs heating, coating and cooling processing to coat the non-coated coating on the welding tip A step of forming a coating layer 40, which is a main constituent of the present invention, on the surface of the welding tip.

At this time, the coating chamber is configured to evaporate the non-cohesive coating material such as an arc method or an ion beam method to deposit the coating material on the surface of the welding tip as a coating material, have. In addition, it is preferable that a plurality of welding tips are fixed to the jig in the inner space of the coating chamber so as to have a certain accommodation space so that a plurality of welding tips can be inserted and coated at one time.

In addition, the welding tip introduced into the coating chamber removes water or moisture caused by moisture in the air due to the cleaning process (S100) which may be on the surface of the welding tip, and smooth deposition of the evaporated coagulation coating It is preferred that the coating is a heat treatment at a constant temperature and in case the non-cohesive coating is composed of at least one of titanium, aluminum titanium, titanium nitride, aluminum titanium nitride, aluminum aluminum nitride or silicon nitride, It is preferable to heat for 30 to 50 minutes.

In addition, the welding tip, which is drawn into the coating chamber and heated, is coated with the non-adherent coating. The operating conditions of the coating chamber can be variously set according to the kind of the used coating chamber. However, The thickness of the coating layer 40 in the case where it is composed of at least one of aluminum titanium, aluminum nitride, aluminum titanium nitride, aluminum aluminum nitride, or silicon nitride is preferably maintained within a range of 1.0 to 5.0 mu m.

In addition, it is preferable that the welding tip formed with the coating layer 40 as described above is cooled in the coating chamber and drawn out of the coating chamber. At this time, the cooling rate of the coated welding tip is slightly different depending on the kind of the non- However, when the cohesionless coating is composed of at least one of titanium, aluminum titanium, aluminum nitride, aluminum nitride, titanium nitride or silicon nitride, it is preferable that the coating is performed at a cooling rate of 70 to 100 ° C / min. That is, when the cooling rate is less than 70 캜 / min, the cooling rate is excessively slow and the hardness of the coating layer 40 is somewhat insufficient. When the cooling rate is more than 100 캜 / min, the hardness of the coating layer 40 is excellent It is preferable to maintain the cooling rate within the above range because the hardness of the improved coating layer 40 causes a problem that the coating layer 40 can be easily peeled off when the welding tip is used.

In addition, the water washing step (S300) is a step of washing out the non-cohesive coating particles present on the surface of the coating layer (40) with water by withdrawing the welding tip treated in the coating process (S200) from the coating chamber and washing with water. At this time, the water washing step (S300) may be performed one or more times using water as in the washing step (S100), or various kinds of cleaning agents may be mixed with water and washed.

The following is a method of manufacturing a spatter-cost-wearing welding tip in accordance with the manufacturing method according to the first preferred embodiment of the present invention.

1. Cleaning process

(1) a welding part having a threaded part formed on the outer periphery, a holding part extending from the fastening part and having a tapered inclination to the outside, and a hollow part passing through the center of the fastening part and the holding part in the longitudinal direction, Is washed twice with water.

2. Coating process

① After drying the 1-① treated welding tip in a natural state, fix the fastening part to the jig, and draw it into the arc type coating chamber and heat it for 40 minutes.

② The coated welding tip is coated with titanium nitride (Tin) as a non-cohesive coating to a thickness of 2.0 μm on average to form a coating layer.

(3) Cool the treated welding tip (2) at a cooling rate of 80 ° C / min.

3. Washing process

① The 2-③ treated welding tip is taken out of the coating chamber and washed with water twice to complete the spatter-cost welding tip coated with titanium nitride on the holding part.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It is possible to carry out various changes in the present invention.

10: fastening part 20: holding part
30: Hollow 40: Coating layer
50: weld line 60: supply line
S100: Cleaning process S200: Coating process
S300: Washing process

Claims (5)

A fastening portion 10 penetrating the weld line 50 with the hollow 30 formed at the center in the longitudinal direction and fastened to a supply line 60 formed with a thread and supplying the weld line 50;
The weld line 50 is passed through the hollow 30 formed at the center in the longitudinal direction in such a manner as to extend from the fastening part 10 and to be ventilated with the hollow 30 of the fastening part 10, And the outer portion of the opposite end portion is composed of a holding portion 20 formed in a tapered shape,
Characterized in that the holding part (20) is coated with a non-cohesive coating of a metal material having a higher melting point than a metal material constituting the holding part (20) to form a coating layer (40) tip.
The method according to claim 1,
The cost-
Characterized in that the sputter-free welding tip is made of at least one of titanium, aluminum titanium, titanium nitride, titanium aluminum nitride, aluminum nitride or silicon nitride.
3. The method of claim 2,
The coating layer (40)
And is configured to be coated on the holding portion (20) at a thickness of 1.0 to 5.0 mu m.
The method according to claim 1,
The coating layer (40)
Wherein the holding portion (20) is also configured to coat the inner surface of the hollow (30).
A cleaning step (S100) of cleaning the emulsion attached to the surface of the metal welding tip;
A coating process (S200) for removing water from the welding tip treated in the cleaning process (S100), drawing it into the coating chamber, and then sequentially performing heating, coating and cooling processes to coat the non- ;
And a water washing step (S300) of taking out the welding tip treated with the coating process (S200) from the coating chamber and washing it with water (S300).
KR1020140002545A 2014-01-08 2014-01-08 Welding tip and manufacturing method thereof KR20140061324A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101482228B1 (en) * 2014-09-10 2015-01-21 김태웅 Welding tip, jig for tip coaing, and method for coating a tip
CN104289799A (en) * 2014-09-25 2015-01-21 北京石油化工学院 Narrow gap welding current contact nozzle with aluminum oxide insulating coating
KR101665873B1 (en) * 2015-06-03 2016-10-13 주식회사 포스코 Welding apparatus
CN106031959A (en) * 2015-03-12 2016-10-19 深圳市瑞凌实业股份有限公司 A current contact nozzle and a welding gun
KR20170018738A (en) 2015-08-10 2017-02-20 (주)동화웰딩 Welding torch and manufacturing method thereof
KR102361082B1 (en) 2020-11-04 2022-02-14 주식회사 브랜드뉴 Handy type welding torch with weld stability secured

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101482228B1 (en) * 2014-09-10 2015-01-21 김태웅 Welding tip, jig for tip coaing, and method for coating a tip
WO2016039522A1 (en) * 2014-09-10 2016-03-17 김태웅 Welding mechanism, jig for coating welding mechanism, and method for coating welding mechanism
CN104289799A (en) * 2014-09-25 2015-01-21 北京石油化工学院 Narrow gap welding current contact nozzle with aluminum oxide insulating coating
CN106031959A (en) * 2015-03-12 2016-10-19 深圳市瑞凌实业股份有限公司 A current contact nozzle and a welding gun
KR101665873B1 (en) * 2015-06-03 2016-10-13 주식회사 포스코 Welding apparatus
KR20170018738A (en) 2015-08-10 2017-02-20 (주)동화웰딩 Welding torch and manufacturing method thereof
KR102361082B1 (en) 2020-11-04 2022-02-14 주식회사 브랜드뉴 Handy type welding torch with weld stability secured

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