WO2016039522A1

WO2016039522A1 - Welding mechanism, jig for coating welding mechanism, and method for coating welding mechanism

Info

Publication number: WO2016039522A1
Application number: PCT/KR2015/006502
Authority: WO
Inventors: 김태웅; 김상천; 박병학
Original assignee: 김태웅; 김상천; 박병학
Priority date: 2014-09-10
Filing date: 2015-06-25
Publication date: 2016-03-17
Also published as: KR101482228B1

Abstract

The present invention provides a method for coating a welding mechanism, comprising the steps of: adjusting the height between the bottom surface of a plate body and the ground in order to insert an object into an insertion hole, which is formed at the plate body, for mounting an object; insertively mounting the object at the insertion hole, which is formed at the plate body, for mounting an object; and forming a coating protective film at the upper part of a contact-tip by being mounted at the insertion hole such that a coating solution is discharged to the upper part of the contact-tip exposed to the outside, wherein the protective film is formed from any one of titanium dioxide, a mixture of chromium oxide and titanium dioxide, a mixture of aluminum oxide and titanium dioxide, white alumina, high-purity chromium oxide, a mixture of aluminum oxide and titanium dioxide, a zirconium oxide mixture, a mixture of zirconium oxide and yttrium oxide, a yttria-stabilized zirconia mixture, a mixture of gray alumina, chromium oxide and silica, a nickel-chromium (Ni-Cr) alloy, tungsten carbide, chromium carbide, tungsten-nickel carbide, nickel-cobalt, nickel carbide, nickel-tungsten, tungsten, and nickel. Therefore, there are effects of simplifying a process overall and reducing the cost of materials.

Description

Welding tool, welding tool coating jig, and coating method of welding tool

The present invention relates to a welding tool, a welding tool coating jig, and a coating method of the welding device, and more particularly, a welding tool, a welding tool coating jig for suppressing damage and enabling long-term use, And a coating method of a welding apparatus.

Gas metal arc welding (GMA welding) is a welding method in which an arc is generated between the front end of the supplied welding wire and the base material by continuously supplying a welding electrode serving wire to the base material while using a shielding gas. The welding wire is led to the molten pool through the contact tip. The welding wire guided to the molten pool is melted by the high arc heat and transferred to the molten pool through the arc column, and the molten site is surrounded by the shielding gas supplied through the gas nozzle. Protected from the atmosphere

In order to keep the arc stable during the welding process, the rate at which the welding wire is fed should match the melting rate of the welding wire. For this purpose, a controlled current must be supplied to the welding wire, which current is transmitted to the welding wire through a contact tip.

However, if the welding is performed for a long time, the contact tip is damaged so that the transmission of the welding current to the welding wire and the function of inducing the welding wire to the position to be welded cannot be performed completely. This causes the arc to become unstable and eventually requires tip replacement. Recently, in the welding industry, the use of flux cored welding wire has increased, and automated welding and high current welding have become commonplaces to improve productivity, thereby shortening the service life of the contact tip, thereby frequently exchanging the tip.

In particular, a test method for quantifying tip life and comparing and evaluating it is proposed for mechanisms in which the tip diameter is expanded. However, there is a problem that it is difficult to perform in the industrial field because it takes a lot of effort and time to apply such a test method.

As a result, the life of the tip is shortened, and the number of replacement of the tip is increased, which impairs welding productivity and increases the consumption cost of the tip.

An object of the present invention is to provide a welding apparatus, a jig for welding apparatus coating, and a coating method for a welding apparatus, which suppresses damage and enables long-term use.

The present invention includes a body portion and a connecting portion formed at one end of the body portion to couple the body portion to a welding torch, wherein the body portion and the connecting portion for inserting a welding wire into the body portion and the connecting portion. A through hole is formed along the longitudinal direction, and a coating protective film is formed on a part of the outer peripheral surface and the inner peripheral surface of the upper portion of the body part, and the protective film includes titanium dioxide, chromium oxide, a titanium dioxide mixture, aluminum oxide, and titanium dioxide. Mixtures, white alumina, high purity chromium oxide, aluminum oxide, titanium dioxide mixtures, nitrous oxide mixtures, nitrous oxide, yttrium oxide mixtures, yttria, stabilized zirconia mixtures, gray alumina and Chromium oxide and silica mixture, nickel chromium (Ni-Cr) alloy, tungsten carbide, chromium carbide, tungsten-nickel And carbide, nickel provides a welding mechanism is formed of one of tungsten and tungsten and nickel-cobalt, nickel and carbide, nickel.

According to another aspect of the present invention, the present invention is coupled to the plate body to support the plate body and the plate body is formed adjacent to each other a plurality of insertion holes that are inserted from below to be inserted upwards so that the welding mechanism is detachable And a nozzle configured to form a coating protective film by thermal spray coating the upper part of the object exposed to the outside and mounted to the insertion hole, wherein the protective film includes titanium dioxide, chromium oxide, and titanium dioxide. The mixture, aluminum oxide, titanium dioxide mixture, white alumina, high purity chromium oxide, aluminum oxide, titanium dioxide mixture, cornium oxide mixture, cornium oxide, yttrium oxide mixture, yttria, Stabilized Zirconia Mixture, Gray Alumina, Chromium Oxide and Silica Mixture, Nickel Chromium (Ni-Cr) Alloy, Tungsten A tool coating jig for welding is formed of any one of carbide, chromium carbide, tungsten-nickel carbide, nickel-cobalt, nickel carbide, nickel-tungsten, tungsten and nickel.

According to another aspect of the invention, the present invention, the step of forming a coating layer on the inner circumferential surface formed with the through hole of the welding tool is formed in the through hole for charging the welding wire, the insertion hole for welding apparatus formed on the plate body Adjusting the height between the lower surface of the plate body and the ground in order to insert the welding tool in the step; inserting and mounting the welding tool in the insertion hole formed in the plate body; and mounting in the insertion hole. And discharging the coating liquid to an upper portion of the welding tool exposed to the outside, thereby forming a coating protective film on the upper part of the welding tool.

Welding apparatus coating method and jig and welding apparatus using the same according to the present invention has the following effects.

First, even when the welding is performed for a long time, it is possible to suppress the damage of the welding mechanism, so that the welding current supply function to the welding wire and the induction function of the welding wire to the welding position can be completely performed.

Second, the life of the welding apparatus is extended, thereby improving welding productivity and reducing the consumption cost of the welding apparatus.

Third, the coating layer is formed on the inner circumferential surface surrounding the through-holes in which the welding wires are inserted, thereby improving durability and abrasion resistance, and preventing occurrence of short circuits by preventing lifting between the welding wires.

1 is a perspective view of a welding mechanism according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a state in which a welding wire is inserted into the welding mechanism shown in FIG. 1.

3 is a cross-sectional view showing a state in which a welding wire is inserted into the welding apparatus shown in FIG. 1.

FIG. 4 is a schematic view showing a tip coating jig for forming a coating protective film on the welding tool shown in FIG. 1.

FIG. 5 is a perspective view illustrating a plate body, a supporting means, and a welding mechanism inserted into the plate body among the components illustrated in FIG. 4.

6 is a flowchart illustrating a method of coating the welding tool shown in FIG. 1 using the welding tool coating jig shown in FIG. 4.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 shows a welding tip 100 according to an embodiment of the present invention.

Referring to FIG. 1, the welding device 100 includes a body part 110 and a connection part 120. The body 110 is coupled to the diffuser (not shown) of the welding torch to continuously supply the welding wire 140 to the base material during welding, and to generate an arc between the tip of the welding wire 140 and the base material, At the same time serves to guide the welding wire 140 to the position to be welded.

The connection portion 120 is formed at one end of the body portion 110 so that the body portion 110 is coupled to the welding device 100 to perform the above-described role. Around the outer circumferential surface of the connecting portion 120 is formed a thread corresponding to the welding torch is coupled through rotation. However, this is merely an example, and the coupling manner of the connection part 120 may be variously changed for coupling the body part 110 and the welding torch.

2 and 3 illustrate a state in which a welding wire 140 is inserted into the welding device 100.

2 and 3, the body part 110 is charged into the body part 110 and the connection part 120 to supply the welding wire 140 to the base material. A through hole is formed along the longitudinal direction of the connection part 120.

Here, a coating layer (not shown) is formed on the inner circumferential surface of the body part 110 and the connection part 120 in which the through hole is formed. The coating layer improves durability to prevent abrasion of the inner circumferential surface surrounding the through-holes of the body part 110 and the connection part 120, and also the body part 110 and the connection part 120 made of the same material. When the welding wire (140) is inserted into the through hole due to thermal expansion, etc.), it is possible to prevent a short circuit caused by lifting between the inner circumferential surface surrounding the through hole and the welding wire 140. The coating layer is preferably formed through nickel chromium electroplating, but is not limited thereto. The detailed description and method of the nickel chromium electroplating are similar to those of the well-known nickel chromium electroplating. Shall be.

On the other hand, a portion of the outer peripheral surface and the inner peripheral surface of the upper end of the body portion 110 is formed with a coating protective film 130 to a predetermined thickness. The protective film 130 includes titanium dioxide, chromium oxide, titanium dioxide mixture, aluminum oxide, titanium dioxide mixture, white alumina, high purity chromium oxide, aluminum oxide, titanium dioxide mixture, and chromium oxide Admixture, cornium oxynitride, yttrium oxide admixture, yttria, stabilized zirconia admixture, gray alumina, chromium oxide and silica mixture, nickel chromium (Ni-Cr) alloy, tungsten carbide, chromium carbide And tungsten-nickel carbide, nickel-cobalt, nickel carbide, nickel-tungsten, tungsten, and nickel, but are preferably formed of any one of, but not limited thereto. More detailed characteristics of the components constituting the coating protective film 130 are shown in Table 1 below.

On the other hand, the welding device 100 may be applied as a welding tip (eg, a contact tip), but any welding device that is exposed to a high temperature environment such as a welding diffuser and a nozzle mainly used for carbon dioxide welding may be used. Applicable

Through the coating protective layer 130 as described above, by suppressing the expansion of the burn back and the tip diameter due to the long-term welding, the welding current supply to the welding wire 140 and the welding position of the welding wire 140 Induction function can be performed intact.

4 is a schematic view showing a coating jig 200 for coating the welding tool 100, Figure 5 is a perspective view showing a state in which the welding tool 100 is inserted into the jig 200. to be.

4 and 5, the welding tool coating jig 200 (hereinafter, referred to as a jig) includes a plate body 220, a support means 210, and a nozzle 230.

The plate body 220 is formed such that the plurality of insertion holes 221 inserted and mounted downward from above so that the welding mechanism 100 is detachable are adjacent to each other. The welding device 100 includes a welding device 100 in a state where the coating protective film 130 is not formed.

The welding device 100 is inserted into the plurality of insertion holes 221 of the plate body 220, respectively, and the welding device 100 is mounted upwardly from below the plate body 220. Will be. Therefore, the stop portion of the welding tool 100 is in contact with the inner circumferential surface of the insertion hole 221, the upper end of the welding device 100 is mounted so as to be exposed to the upper portion of the plate body 220.

The insertion holes 221 are adjacent to each other, but are arranged in a matrix structure to uniformly arrange the welding device 100 and to form a smooth coating protective film 130. The diameter of the insertion hole 221 is appropriately formed in consideration of the shape and size of the welding tool 100 so that the upper end of the welding tool is exposed and mounted.

The support means 210 serves to support the plate body 220 spaced apart from the ground at a predetermined interval. The support means 210 is fastened to the mounting hole formed in the plate body 220 and bolts 212 for adjusting the height between the lower surface and the ground of the plate body 220 in the forward or reverse rotation manner, The bolt 212 includes a nut 211 that fixes one end of the bolt 212 fastened to the mounting hole so as to prevent the bolt 212 from being separated from the mounting hole.

Therefore, when the welding apparatus 100 is inserted and mounted from below the plate body 220 upward, by adjusting the height of the plate body 220 through the support means 210, the welding mechanism ( Insertion and mounting from below of the plate body 220 according to the height of 100 may be facilitated.

The bolt 212 and the nut 211 is an example of the support means 210, but is not limited to this, from below the upper limb plate body 220 without being limited to the height of the welding tool 100. Various ways for mounting are applicable.

The nozzle 230 is thermally coated on the upper portion of the welding tool 100 that is mounted to the insertion hole 221 and exposed to the outside to form a coating protective film 130. At this time, the protective film 130, titanium dioxide, chromium oxide, titanium dioxide mixture, aluminum oxide, titanium dioxide mixture, white alumina, high purity chromium oxide, aluminum oxide, titanium dioxide mixture, acid Cornium Oxide, Yttrium Oxide, Yttria, Yttria, Stabilized Zirconia, Gray Alumina, Chromium Oxide and Silica Mixture, Nickel Chromium (Ni-Cr) Alloy, Tungsten Carbite, It is formed of chromium carbide, tungsten-nickel carbide, nickel-cobalt, nickel carbide, nickel-tungsten, tungsten and nickel.

FIG. 6 is a flowchart illustrating a tip coating method S100 of coating the welding tool 100 illustrated in FIG. 1 using the jig 200 illustrated in FIG. 4.

Referring to FIG. 6, the bottom surface of the plate body 220 and the ground to insert the welding device 100 into the insertion hole 221 for mounting the welding device 100, which is an object formed on the plate body 220. Adjust the height between (step S110).

The welding tool 100 is inserted into the welding tool mounting insertion hole 221 formed in the plate body 220.

As described above, the welding tool 100 has a through hole for charging a welding wire, and in this case, the welding tool 100 is inserted into the welding tool mounting insertion hole 221. Before mounting, the coating layer is formed by performing nickel chromium electroplating on the inner circumferential surface of the through hole.

The coating solution is discharged to the upper portion of the welding device 100 mounted on the insertion hole 221 and exposed to the outside, thereby forming a coating protective film 130 on the welding device 100. )

The protective film 130 includes titanium dioxide, chromium oxide, titanium dioxide mixture, aluminum oxide, titanium dioxide mixture, white alumina, high purity chromium oxide, aluminum oxide, titanium dioxide mixture, and chromium oxide Admixture, cornium oxynitride, yttrium oxide admixture, yttria, stabilized zirconia admixture, gray alumina, chromium oxide and silica mixture, nickel chromium (Ni-Cr) alloy, tungsten carbide, chromium carbide And tungsten-nickel carbide, nickel-cobalt, nickel carbide, nickel-tungsten, tungsten and nickel.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

According to the present invention it is possible to produce a contact tip used for gas metal arc welding.

Claims

A body portion, and a connecting portion formed at one end of the body portion to couple the body portion to a welding torch, the length of the body portion and the connecting portion along the length direction of the body portion and the connecting portion for charging a welding wire into the body portion and the connecting portion. A through hole is formed, and a welding protection mechanism is formed on the outer peripheral surface and the inner peripheral surface of the upper portion of the body portion to a predetermined thickness of the coating protective film.
The method according to claim 1,

The protective film,

Titanium Dioxide, Chromium Oxide, Titanium Dioxide Mixture, Aluminum Oxide, Titanium Dioxide Mixture, White Alumina, High Purity Chromium Oxide, Aluminum Oxide, Titanium Dioxide Mixture, Cornium Oxide Mixture, Yttrium oxide, yttria, stabilized zirconia mixture, gray alumina, chromium oxide and silica mixture, nickel chromium (Ni-Cr) alloy, tungsten carbide, chromium carbide, tungsten-nickel carbide, Welding apparatus formed with any one of nickel, cobalt, nickel carbide, nickel-tungsten, tungsten, and nickel.
The method according to claim 1,

A coating layer is formed on the inner circumferential surface of the body portion and the connection portion in which the through hole is formed.

And the coating layer is formed by nickel chromium electroplating.
The method according to claim 1,

The welding device is a welding device that is a welding tip.
A plate body in which a plurality of insertion holes are inserted to be inserted from below and upward to be detachable from each other so that the welding mechanism is detachable;

Support means coupled to the plate body to support the plate body; And

A welding tool coating jig including a nozzle mounted on the insertion hole to form a coating protective film and a thermal spray coating on the upper portion of the welding tool exposed to the outside.
The method according to claim 5,

The protective film,

Titanium Dioxide, Chromium Oxide, Titanium Dioxide Mixture, Aluminum Oxide, Titanium Dioxide Mixture, White Alumina, High Purity Chromium Oxide, Aluminum Oxide, Titanium Dioxide Mixture, Cornium Oxide Mixture, Cornium Oxide, Yttrium oxide, yttria, stabilized zirconia mixture, gray alumina, chromium oxide and silica mixture, nickel chromium (Ni-Cr) alloy, tungsten carbide, chromium carbide, tungsten-nickel carbide, A welding tool coating jig formed of any one of nickel, cobalt, nickel carbide, nickel-tungsten, tungsten and nickel.
The method according to claim 5,

And the insertion holes are arranged in a matrix structure.
The method according to claim 5,

It further comprises one or more mounting holes threaded therein,

The support means,

Bolted to the mounting hole for adjusting the height between the lower surface of the plate body and the ground in the forward or reverse rotation manner and

And a nut for fixing one end of the bolt fastened to the mounting hole to prevent the bolt from being separated from the mounting hole.
The method according to claim 5,

The welding tool is a welding tool coating jig that is a welding tip.
Adjusting the height between the bottom surface of the plate body and the ground to insert the welding tool into the welding device mounting insertion hole formed in the plate body;

Inserting the welding tool into the insertion hole formed in the plate body; And

The coating method of the welding device comprising the step of forming a coating protective film on the upper portion of the welding device by discharging the coating liquid to the upper portion of the welding device mounted on the insertion hole exposed to the outside.
The method according to claim 10,

The protective film,

Titanium Dioxide, Chromium Oxide, Titanium Dioxide Mixture, Aluminum Oxide, Titanium Dioxide Mixture, White Alumina, High Purity Chromium Oxide, Aluminum Oxide, Titanium Dioxide Mixture, Cornium Oxide Mixture, Yttrium oxide, yttria, stabilized zirconia mixture, gray alumina, chromium oxide and silica mixture, nickel chromium (Ni-Cr) alloy, tungsten carbide, chromium carbide, tungsten-nickel carbide, The coating method of the welding tool formed from any one of nickel-cobalt, nickel carbide, nickel-tungsten, tungsten, and nickel.
The method according to claim 10,

The coating layer is a coating method of the welding tool formed through the nickel chromium electroplating.
The method according to claim 10,

The welding device is a coating method of the welding device is a welding tip.
The method according to claim 10,

And forming a coating layer on an inner circumferential surface of the welding tool in which the through hole for inserting a welding wire is formed before inserting the welding tool in the insertion hole.