KR102206791B1 - argon gas welding torch head with gas saving function - Google Patents

Abstract

The present invention relates to an argon gas welding torch head with a gas-saving function, which comprises: a head mainframe wherein the outer circumferential surface of a front end unit is curved, an outer surface of a middle end unit has a male screw, the inner diameter surface of a rear end unit has a female screw, an accommodation groove is formed to be indented from the rear end unit toward the front end unit for a certain depth, an electrode rod exit communicating with the front end unit through the accommodation groove is formed, and the outer circumferential surface of the front end unit has a plurality of gas discharge holes inclined toward a front side to communicate with the accommodation groove at regular distances from each other; and a head core wherein the outer circumferential surface of a large end unit has a core male screw corresponding to the female screw, an outer surface of a small end unit connected to the large end unit has a plurality of discharge holes formed in multiple steps at regular distances from each other, a flow path is formed along a center line to penetrate the large end unit and the small end unit, an inner diameter (D1) of a first flow path formed on the small end unit is certain, an inner diameter (D2) of a second flow path formed on a front end of the large end unit and connected to the first flow path is smaller than the inner diameter (D1) of the first flow path, the inner diameter (D3) of a third flow path connected to the second flow path is formed as an inclined surface rising more and more toward a rear end, and the inner diameter (D4) of a fourth flow path connected to the third flow path is formed to be certain. The present invention aims to provide the argon gas welding torch head with a gas-saving function, which is able to enhance welding quality.

Description

Argon gas welding torch head with gas saving function

The present invention relates to a welding torch, in particular, an argon gas welding torch, and relates to an argon gas welding torch head having an excellent argon gas saving function.

In general, welding can be classified into argon welding, gas welding, resistance welding, and special welding. Among them, argon welding uses electric discharge to create an arc between the electrode and the electrode, and melts and welds the welded part by the heat generation.

Argon welding is a metal or active metal with a high melting point, since it reacts with the atmosphere and contaminates the welding site, the work is performed in a chamber filled with an inert gas. Alternatively, a method of continuously spraying an inert gas until the welding part is sufficiently cooled after performing welding with a welding electrode equipped with a nozzle through which an inert gas is injected is used.

Electrodes used for argon welding include a consumable electrode that fills the joint by melting the electrode itself, a welding electrode, and a non-consumable electrode that melts and bonds a material without melting the electrode.Tungsten welding is a method of using tungsten among the consumable electrodes. It is called Inert Arc Welding, TIG).

Tig welding is a welding method in which heat is generated by argon by generating argon between a tungsten electrode and a base material in an atmosphere of argon gas, which is an inert gas, so that the base material and the welding rod are melted to join the metal.

In this way, a welding machine using argon generates a voltage to generate each electrode, a torch connected to the welding machine body with an electric wire, a tungsten electrode installed at a discharge port, and argon generated between the welding machine torch and the base material. It includes an electric wire connecting the welding machine body and the base material, a gas storage tank connected to the welding machine body to supply argon gas to the welding machine torch, and a switch box for controlling the operation of the welding machine.

1 is a perspective view of a conventional torch for an argon welding machine.

As shown, the conventional torch 1 includes a handle body 10 to which an electric wire C is connected and serves as a handle, and a torch head 30 into which the electrode 5 is inserted, and the handle body 10 Is connected to the extension 20 extending from the torch head 30.

Here, argon gas is supplied from the gas storage tank to the torch head 30 through the handle 10 and the extension 20. Electrodes of various sizes are inserted into the torch head 30 according to the purpose, and one side of the electrode which is not directly used for welding is sealed by a rear cap 40. In addition, a partial area of the electrode directly used for welding is provided to be covered by the ceramic nozzle 70.

However, in the case of the conventional argon gas welding torch, gas is ejected at high pressure unnecessarily at the initial stage and consumes excessive gas. As argon gas is ejected at high pressure to enable stable welding even in the process of welding, expensive argon gas There was a problem that consumption was severe.

Registered Patent 10-2058698

Accordingly, in the present invention, it is intended to provide an argon gas welding torch head having a gas-saving function of a new structure that can reduce the amount of argon gas usage and further improve welding quality.

In order to achieve this problem, the argon gas welding torch head having a gas-saving function in the present invention has a curved outer circumferential surface of the front end, a male thread is formed on the outer surface of the middle end, and a female thread is formed on the inner diameter surface of the rear end, A receiving groove is formed to be recessed from the rear end to the front end to a predetermined depth, and an electrode rod outlet communicating from the front end to the receiving groove is formed, and the receiving groove and the receiving groove are equally spaced on the outer peripheral surface of the front end. A head body having a plurality of gas ejection holes formed to be inclined toward the front in communication; A core male screw corresponding to the female screw is formed on the outer circumferential surface of the large end to be fastened, and a plurality of discharge holes formed at equal intervals on the outer surface of the small end connected to the large end are formed in multiple stages, and the large end and the large end along the center line A flow path penetrating the small end is formed, the inner diameter D1 of the first flow path formed at the small end is constant, and the inner diameter D2 of the second flow path formed at the front end of the large end and connected to the first flow path ) Is smaller than the inner diameter (D1) of the first passage, and the inner diameter (D3) of the third passage connected to the second passage is made of an inclined surface that increases toward the rear end, and the fourth passage connected to the third passage The inner diameter (D4) is characterized in that it includes; a head core formed to be constant.

Preferably, the male core screw includes a first male core screw in a predetermined section directly fastened to the female screw, a second male core screw formed at a predetermined distance from the first male core screw, and the first male core screw and the first male screw. The section between the two core male threads is characterized in that it consists of a non-screw part.

Preferably, when the head core is inserted into the receiving groove of the head body and fastened, the receiving groove is formed deeper forward than the front end of the small end of the head core, thereby forming a buffer space.

According to the argon gas welding torch head having a gas-saving function according to the present invention, it has the effect of minimizing gas consumption by increasing the ejection pressure of argon gas through a unique structure, and improves welding quality through more stable ejection of argon gas. There is an effect that you can make it.

In addition, in the case of the argon gas welding torch head having the gas-saving function of the present invention, the jet pressure of the argon gas that is initially jetted for welding is stabilized so that welding can be done immediately. There is also an effect.

1 is a perspective view of a conventional torch for a general argon welding machine.
2 is a perspective view of an argon gas welding torch head having a gas-saving function according to the present invention.
Figure 3 is a cross-sectional view of Figure 2;
4 is an exploded perspective view of an argon gas welding torch head having a gas-saving function according to the present invention.
5 is a cross-sectional view of the head core.
Figure 6 is a plan view of Figure 2;
7 is an exemplary photograph of a welding torch head of a company.
8 is a photograph of an initial gas reduction test using a welding torch head of a company.
9 is a photograph of the welding torch head of the present invention used in the test.
10 is a photograph of an initial gas reduction test using the welding torch head of the present invention.
11 is a photograph of a gas use state during welding using a welding torch head of another company.
Figure 12 is a photograph of the state of use of gas during welding using the welding torch head of the present invention.

Hereinafter, a more detailed description of the argon gas welding torch head having a gas-saving function according to the present invention will be described, and reference will be made to the accompanying drawings.

2 is a perspective view of an argon gas welding torch head having a gas-saving function according to the present invention, FIG. 3 is a cross-sectional view of FIG. 2, and FIG. 4 is an exploded perspective view of an argon gas welding torch head having a gas-saving function according to the present invention 5 is a cross-sectional view of the head core, FIG. 6 is a plan view of FIG. 2, FIG. 7 is an exemplary photo of a welding torch head of a company, and FIG. 8 is a photo of an initial gas reduction test using a welding torch head of a company 9 is a photograph of the welding torch head of the present invention used for the test, FIG. 10 is a photograph of an initial gas saving test using the welding torch head of the present invention, and FIG. 11 is a photograph of welding using a welding torch head of another company Is a photograph of the state of use of gas, and FIG. 12 is a photograph of the state of use of gas during welding using the welding torch head of the present invention.

As shown, the argon gas welding torch head having a gas-saving function according to the present invention is a main component, and is composed of a head body 100 and a head core 200.

As the head core 200 is inserted into the head body 100, they are coupled to each other to form an argon gas welding torch head. The nozzle 300 is fastened in front of the head body 100 and the electrode rod 400 is inserted while penetrating the head body 100 and the head core 200.

The outer circumferential surface of the front end 110 of the head body 100 is made of a smooth curved surface, a male screw 121 is formed on the outer surface of the middle part 120, and a female screw 131 is formed on the inner diameter surface of the rear end 130 . In addition, a receiving groove 101 that is depressed from the rear end 130 toward the front end 110 to a predetermined depth is formed, and an electrode rod outlet 140 communicating from the front end to the receiving groove 101 is formed.

In addition, a plurality of gas ejection holes 111 are formed on the outer circumferential surface of the front end 110 so as to be inclined toward the front so as to communicate with the receiving groove 101 at equal intervals.

The head core 200 is inserted into the receiving groove 101 formed from the rear end 130 of the head body 100, and the outer circumferential surface of the large end 210 of the head core 200 corresponds to the female screw 131 The core male screw 211 is formed so that the head core 200 is coupled to the head body 100.

On the other hand, the core male screw 211 has a predetermined distance from the first male core screw 211-1 and the first male core screw 211-1 in a predetermined section that is directly fastened to the female screw 131 of the head body 100. It consists of a second core male screw 211-2 and a non-screwed portion 211-3 formed between the first core male screw 211-1 and the second core male screw 211-2. From the rear end of the large end 210 of the head core 200, a second core male screw 211-2, a non-threaded portion 211-3, and a first core male screw 211-1 are sequentially formed. The second core male screw 211-2 is a portion fastened to the torch handle.

A large end portion 210 is formed over a predetermined length, and a small end portion 220 whose outer diameter is subsequently reduced is formed, and a plurality of discharge holes 221 are formed in multiple stages at equal intervals on the outer surface of the small end portion 220 . In the case of this embodiment, it is assumed that the discharge holes 221 are formed in three stages, and the discharge holes 221 formed in each stage are formed in six at an angle of 60 degrees. That is, a total of 18 discharge holes 221 are formed in the small end 220.

Meanwhile, a flow path 230 passing through the large end 210 and the small end 220 is formed along the center line, and the flow path 230 includes a first flow passage 231, a second flow passage 232, and a third flow passage. (233), the fourth passage (234) forms a continuous continuous form.

In particular, the first passage 231 is formed from the small end portion 220, the inner diameter (D1) of the first passage 231 is formed constant, the second passage 232 connected to the first passage 231 Is formed at the front end of the large end 210 and the inner diameter D2 of the second passage 232 is smaller than the inner diameter D1 of the first passage 231.

A third passage 233 connected to the second passage 232 is formed, and the inner diameter D3 of the third passage 233 is formed of an inclined surface that increases toward a rear end. In addition, a fourth passage 234 connected to the third passage 233 is provided, and the inner diameter D4 of the fourth passage 234 has a constant inner diameter.

The inner diameter of each of the four channels 230 is different, and the order of the largest inner diameter is D4>D1>D3>D2, the inner diameter of the second passage 232, that is, the dimension of D2 is the smallest and the fourth passage 234 Make the inner diameter D4 of the largest dimension.

In this way, a flow path 230 that continuously extends from the large end 210 to the small end 220 of the head core 200 is formed, and the flow path 230 is divided into four sections having different inner diameters, and the large end 210 After argon gas flows in through the fourth channel 234 formed on the) side, the first channel passes through the second channel 232 having the smallest inner diameter after moving to the third channel 233 where the inner diameter gradually decreases. When it is ejected into 231, it is ejected while forming a high pressure, and in the first passage 231, a plurality of discharge holes 221 formed on the outer circumferential surface of the small end 220 and the small end are dispersed toward the front of the head body ( It is ejected into the receiving groove 101 of 100).

The argon gas ejected into the receiving groove 101 is discharged through a plurality of gas ejection holes 111 formed on the outer surface of the head body 100. Argon gas having an increased pressure while passing through the flow path 230 of the head core 200 is ejected into the receiving groove 101, thereby properly decompressing.

The argon gas welding torch head having a gas-saving function of the present invention, which is formed by combining the head body 100 and the head core 200, flows into the head core 200 and passes through the first flow path 231 to the receiving groove 101. ), the argon gas discharged in various directions is evenly distributed and ejected, and finally, it is stably ejected through the gas ejection hole 111 of the head body 100, thereby reducing the initial gas consumption and overall gas consumption. You will be able to.

This reduction effect is possible is related to the structure of the unique flow path 230 of the head core 200, a plurality of discharge holes 221, and the receiving groove 101 of the head body 100.

When the head core 200 is inserted into the head body 100 and fastened, the receiving groove 101 is formed deeper forward than the front end of the small end 220 of the head core 200 as shown in FIG. This is because the inner diameter of 101) is larger than the outer diameter of the small end 220 to form a buffer space around the small end 220. That is, argon gas flowing through the fourth flow path 234 is discharged to the first flow path 231 in a state where the pressure is increased while passing through the third flow path 233 and the second flow path 232, and the first flow path ( In 231, the plurality of discharge holes 221 and the small end 220 are once again evenly distributed and discharged to the receiving groove 101, and the argon gas discharged to the receiving groove 101 is temporarily removed from the buffer space. After staying, it is injected to the outside through the gas ejection hole 111.

That is, since argon gas is mixed in the buffer space and is discharged to the gas ejection hole 111 after temporary stay, it is possible to prevent the initial gas ejection amount from increasing rapidly, and in the case of the present invention as a whole, argon gas flowing into the fourth flow channel 234 The third flow passage 233, the second flow passage 232, the first flow passage 231, and the discharge hole 221, which are continuously connected, increase the pressure in the order of increasing pressure and then appropriately depressurize again in the receiving groove 101. The inlet pressure of argon gas flowing into the 4 channel 234 can be made low. Even if the inlet pressure of the argon gas flowing into the fourth flow path 234 is lowered, the pressure of the argon gas discharged through the final gas ejection hole maintains a suitable pressure for welding, so that a gas saving effect can be achieved.

In order to prove the initial gas saving effect and the overall gas saving effect, which are advantages obtained by using the argon gas welding torch head having a gas saving function according to the present invention, the applicant conducted the following experiment.

First, an argon gas torch head of another company and an argon gas torch head of the present invention were prepared for the initial gas injection amount comparison test.

7 is a photograph of an argon gas torch head of another company, and FIG. 9 is a photograph of an argon gas torch head of the present invention.

Under the same test conditions, the gas injection amount of the argon gas ejected from the gas cylinder was set to 10 L/min.

FIG. 8 shows the change of the discharge pressure measurement gauge when a switch of the handle is pressed to start welding by applying an argon gas torch head of another company, and it can be seen that the ball inside the discharge pressure measurement gauge rises rapidly to the top end.

In comparison, when the argon gas torch head of the present invention is applied, even if the switch is pressed to start welding as shown in FIG. 10, the ball inside the discharge pressure measurement gauge maintains a level slightly rising from the lower side.

That is, as can be seen from the comparison, when the switch of the torch handle is pressed for the first time to start welding, the argon gas torch head of the present invention maintains an appropriate amount, while the initial amount of argon gas is rapidly increased in other products. .

Existing argon gas torch heads such as products from other companies emit too strong argon gas at the initial stage, so at the start, argon gas is not directly used for welding until the pressure is stabilized, but it is blown out into the air. When the pressure stabilizes, welding starts from that point. In contrast, in the argon gas torch head of the present invention, when the switch is initially pressed, the ejection pressure is ejected at a pressure suitable for welding from the beginning, so that the welding can be performed immediately without unnecessarily discarding the argon gas.

In the case of argon gas welding, welders frequently operate a switch to stop welding and then press the switch again to start welding. Accordingly, it can be said that it is too uneconomical as the initial gas consumption that is discarded every time the switch is operated becomes significant.

Next, a comparative test of gas consumption when using the argon gas torch head of the present invention with other products during continuous welding after the initial gas ejection is performed is presented.

11 is a case in which an argon gas torch head of another company is applied, and the amount of argon gas discharged from the gas cylinder is set to 15 L/min as seen through a flow meter by adjusting the main valve. You can check this with the ball on the flow meter.

Subsequently, as shown in FIG. 12, after testing of the argon gas torch head of another company, the gas main pressure valve, etc., were kept fixed and replaced with the argon gas torch head of the present invention. You can see that the gas pressure gauge of the flow meter of liters (15L/min) goes down to 9 liters per minute (9L/min).

Through this, it can be seen that when the argon gas torch head of the present invention is used, argon gas can be significantly reduced during main welding.

Through the comparative test as described above, the argon welding torch head of the present invention can achieve a gas saving effect of at least 40% compared to the existing product, and if the initial gas saving effect is added, it can achieve a very excellent gas saving effect. You can see that there is.

It is a very high useful technique according to the present invention.

100: head body
110: front part 111: gas ejection hole
120: middle part 121: male thread
130: rear end 131: female thread
140: electrode rod outlet 101: receiving groove
200: head core
210: large end 211: core male thread
211-1: 1st core male thread 211-2: 2nd core male thread
211-3: non-screw 220: small end
221: discharge hole 230: euro
231: first euro 232: second euro
233: 3rd euro 234: 4th euro

Claims (3)

In the argon gas welding torch head,
The outer circumferential surface of the front end is made of a curved surface, a male screw is formed on the outer surface of the middle part, and a female screw is formed on the inner diameter surface of the rear end, and a receiving groove is formed to be recessed to a predetermined depth from the rear end toward the front end, and the A head body having a plurality of gas ejection holes formed to be inclined toward the front so as to communicate with the receiving groove while forming an equal interval on the outer circumferential surface of the front end portion and communicating with the receiving groove;
A core male screw corresponding to the female screw is formed on the outer circumferential surface of the large end and is fastened. A plurality of discharge holes formed at equal intervals on the outer surface of the small end connected to the large end are formed in multiple stages, and the discharge holes at each end are 60 A flow path is formed at an angle of degrees and passes through the large end and the small end along a center line, and the inner diameter (D1) of the first flow path formed on the small end is constant, and is formed at the front end of the large end. The inner diameter (D2) of the second passage connected to the first passage is smaller than the inner diameter (D1) of the first passage, and the inner diameter (D3) of the third passage connected to the second passage is a slope that increases toward the rear end. It is made, and the inner diameter (D4) of the fourth flow passage connected to the third flow passage is a head core formed to be constant; includes,
The core male thread,
The section between the first core male screw and the second core male screw formed with a predetermined distance from the first core male screw and the first core male screw and the second core male screw is bina Is made up of masters,
Argon gas welding torch having a gas-saving function, characterized in that when the head core is inserted into the receiving groove of the head body and fastened, the receiving groove is formed deeper forward than the front end of the small end of the head core, thereby forming a buffer space. head.





delete delete

Images