WO2022080619A1

WO2022080619A1 - Argon gas welding torch head having gas-saving function

Info

Publication number: WO2022080619A1
Application number: PCT/KR2021/006999
Authority: WO
Inventors: 고영실; 우성용
Original assignee: (주)센틸
Priority date: 2020-10-13
Filing date: 2021-06-04
Publication date: 2022-04-21
Also published as: KR102206791B1

Abstract

The present invention relates to an argon gas welding torch head having gas-saving function, the welding torch head comprising: a head body including a front end having a curved outer peripheral surface, including a middle portion having a male screw formed on the outer surface thereof, and including a rear end having a female screw formed on the inner diameter surface thereof, the head body having a receiving groove formed to be recessed from the rear end towards the front end to a predetermined depth, having an electrode rod exit formed so as to communicate from the front end to the receiving groove, and having multiple gas ejection holes formed at a constant interval on the outer peripheral surface of the front end so as to slope forwards such that same communicates with the receiving groove; and a head core including a core male screw formed on the outer peripheral surface of a large end thereof so as to correspond to the female screw and fastened thereto, the head core having multiple discharge holes formed in multiple steps at a constant interval on the outer surface of a small end connected to the large end, and having a channel formed through the large end and the small end along a center line, wherein the small end has a first channel formed therein with a constant inner diameter (D1); the large end has a second channel formed in the front end thereof and connected to the first channel, the second channel having an inner diameter (D2) smaller than the inner diameter (D1) of the first channel; a third channel is joined with the second channel and has an inner diameter (D3) gradually increasing towards the rear end thereof, thereby defining an inclined surface; and and a fourth channel is joined with the third channel and is formed to have a constant inner diameter (D4).

Description

Argon gas welding torch head with gas saving function

The present invention relates to a welding torch, particularly an argon gas welding torch, and relates to an argon gas welding torch head having excellent characteristics of reducing argon gas.

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

Argon welding is performed in a chamber filled with an inert gas because, in the case of metals or active metals with a high melting point, the welding site is contaminated by reacting with the atmosphere.

Alternatively, after performing the welding operation with a welding electrode equipped with a nozzle to which the inert gas is sprayed, the method of continuously blowing the inert gas until the welding area is sufficiently cooled is used.

There are two types of electrodes used for argon welding: a consumable electrode that fills the joint by melting the electrode itself, and a non-consumable electrode that melts and joins the material without melting the electrode. Inert Arc Welding (TIG).

TIG welding is a welding method in which argon is generated between a tungsten electrode and a base material in an atmosphere of argon gas, an inert gas, and heat is generated by argon, whereby the base material and the electrode are melted to join metals.

The welding machine using argon as described above includes a welding machine body that generates a voltage to generate each electrode, a torch connected to the welding machine body with an electric wire, and a tungsten electrode installed at an outlet, and argon is generated between the welding machine torch and the base material It includes a wire connecting the welding machine body and the base material as possible, 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 a general 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, the 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 fitted to the torch head 30 according to the purpose, and one side of the electrode that is not directly used for welding is sealed by the rear cap 40 . And a portion of the electrode directly used for welding is provided to be covered by the ceramic nozzle (70).

However, in the case of the existing argon gas welding torch, the gas is expelled at high pressure unnecessarily at the beginning and consumes excessive gas. There was a problem that consumption was severe.

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

In order to achieve this object, in the argon gas welding torch head having a gas-saving function in the present invention, the outer peripheral surface of the front end is made of a curved surface, the outer surface of the middle part is formed with a male thread, and a female thread is formed on the inner diameter of the rear end, A receiving groove formed to be recessed to a predetermined depth from the rear end to the front end is formed, 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 formed at equal intervals on the outer peripheral surface of the front end a head body having a plurality of gas ejection holes that are inclined toward the front to communicate; A core male screw corresponding to the female screw is formed and fastened on the outer peripheral surface of the large end, 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 passing through 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 flow passage, and the inner diameter D3 of the third flow passage connected to the second flow passage has an inclined surface that increases toward the rear end, and the The inner diameter (D4) is characterized in that it includes a head core that is formed uniformly.

Preferably, the male core screw includes a first male core screw having a predetermined section directly fastened to the female screw, a second male male core screw formed with a predetermined separation 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 screws is characterized in that it consists of a non-threaded part.

Preferably, when the head core is inserted and fastened into the receiving groove of the head body, the receiving groove is formed deeper in the front 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, there is an effect that the gas consumption can be minimized by increasing the ejection pressure of argon gas through a unique structure, and the welding quality is improved through more stable argon gas ejection It has the effect of being able to do it.

In addition, in the case of the argon gas welding torch head having a gas-saving function of the present invention, the ejection pressure of the argon gas that is initially ejected for welding is stabilized, so that welding is possible immediately. There is an effect.

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

Figure 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;

Figure 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;

7 is an exemplary photograph of a third-party welding torch head.

8 is a photograph of an initial gas reduction test using a third-party welding torch head.

9 is a photograph of the welding torch head of the present invention used for testing.

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.

12 is a photograph of a gas use state 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 made with reference to the accompanying drawings.

As shown, the argon gas welding torch head having a gas saving function according to the present invention is a main component, and consists 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 to the 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 peripheral surface of the front end 110 of the head body 100 is made of a gently curved surface, the male thread 121 is formed on the outer surface of the middle part 120, and the female thread 131 is formed on the rear end 130 inner diameter surface. . In addition, the receiving groove 101 recessed to a predetermined depth from the rear end 130 toward the front end 110 is formed, and the electrode rod outlet 140 communicating from the front end surface to the receiving groove 101 is formed.

In addition, a plurality of gas ejection holes 111 are formed on the outer peripheral surface of the front end 110 to be inclined toward the front while communicating 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 peripheral surface of the large end 210 of the head core 200 corresponds to the female screw 131. A core male screw 211 is formed so that the head core 200 is coupled to the head body 100 .

On the other hand, the male core screw 211 has a predetermined separation distance from the first male core screw 211-1 and the first male male screw 211-1 in a predetermined section that are 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-threaded portion 211-3 in a section 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, the second core male screw 211-2, the non-threaded portion 211-3, and the 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 210 is formed over a predetermined length, and a small end 220 having a continuously reduced outer diameter is formed. A plurality of discharge holes 221 are formed in multiple stages at equal intervals on the outer surface of the small end 220. . In this embodiment, the discharge holes 221 are formed in three stages, and it is assumed that six discharge holes 221 formed in each stage are formed 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 path 231 , a second flow path 232 , and a third flow path. (233) and the fourth flow path (234) form a continuous continuous.

In particular, the first flow path 231 is formed from the small end 220 , the inner diameter D1 of the first flow path 231 is uniformly formed, and the second flow path 232 is connected to the first flow path 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 has an inclined surface that increases toward the 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 dimensions of each of the four flow passages 230 are different, and in the order of increasing the inner diameter, the inner diameter of the second passage 232 , that is, the dimension of D2 is the smallest in the order of D4>D1>D3>D2, and the fourth passage 234 . Make the dimension of inner diameter D4 of the largest.

As such, a flow path 230 continuously extending 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.

After the argon gas is introduced through the fourth flow path 234 formed on the large end 210 side, it moves to the third flow path 233 in which the inner diameter is gradually reduced, and then the second flow path 232 having the smallest inner diameter. When ejected to the first passage 231 through the passage, 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. It is ejected into the receiving groove 101 of the head body 100 as it is.

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 whose pressure is increased while passing through the flow path 230 of the head core 200 is ejected into the receiving groove 101 and appropriately reduced pressure.

The argon gas welding torch head having a gas-saving function of the present invention consisting of a combination of the head body 100 and the head core 200 is introduced into the head core 200 and then is introduced into the receiving groove 101 through the first flow path 231 . ), the argon gas is uniformly dispersed in various directions and ejected, and then stably ejected through the gas ejection hole 111 of the head body 100, thereby reducing the overall gas consumption as well as the initial gas saving effect. be able to

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

When the head core 200 is inserted and fastened into the head body 100, the receiving groove 101 is formed deeper in the front than the front end of the small end 220 of the head core 200 as shown in FIG. 3, and the receiving groove ( This is because the inner diameter of 101 is larger than the outer diameter of the small end 220 so that a buffer space is formed around the small end 220 .

That is, the argon gas flowing in through the fourth flow path 234 is discharged to the first flow path 231 with the pressure increased while passing through the third flow path 233 and the second flow path 232, and the first flow path ( In 231), the argon gas discharged to the receiving groove 101 is discharged to the receiving groove 101 while being evenly distributed once again through the front of the plurality of discharge holes 221 and the small end 220, and the argon gas discharged to the receiving groove 101 is temporarily in the buffer space. After staying, it is injected to the outside through the gas ejection hole 111 .

That is, the argon gas in the buffer space is discharged to the gas ejection hole 111 after a temporary residence while mixing, so that it is possible to prevent a rapid increase in the initial gas ejection amount. In the present invention, the argon gas flowing into the fourth flow path 234 moves in the order of the third flow path 233 , the second flow path 232 , the first flow path 231 , and the discharge hole 221 , and the pressure After being formed high, the pressure of the argon gas flowing into the fourth flow path 234 can be lowered because the pressure is appropriately reduced again in the receiving groove 101 .

Even when 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 outlet maintains a pressure suitable for welding, so that a gas saving effect can be achieved.

In order to prove the initial gas saving effect and 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 present 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 an initial gas injection quantity comparison test.

Figure 7 is a photograph of a third-party argon gas torch head, Figure 9 is a photograph of the argon gas torch head of the present invention.

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

8 shows a change in the discharge pressure measuring gauge when the switch of the handle is pressed to start welding by applying a third-party argon gas torch head, it can be seen that the ball inside the discharge pressure measuring gauge rapidly rises to the top.

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.

That is, as can be seen from the comparison between the two, 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 ejection amount compared to the initial argon gas ejection amount sharply increased in other products. .

Existing argon gas torch heads such as competitor's products eject argon gas too strongly at the beginning. At the start, the argon gas is blown into the air instead of directly used for welding until the pressure is stabilized. When the pressure is stabilized, welding starts from that point.

In contrast, when the argon gas torch head of the present invention is initially pressed, the ejection pressure is ejected to a pressure suitable for welding from the beginning, so that welding can be performed immediately without discarding the argon gas unnecessarily.

In the case of argon gas welding, welders frequently operate a switch to stop welding and then press the switch again to start welding again. As a result, the amount of initial gas consumed every time the switch is operated becomes significant, so it can be said that it is too uneconomical.

Next, a comparative test for gas consumption in the case of using the argon gas torch head of the present invention and a competitor's product during continuous welding after the initial gas ejection is presented will be presented.

11 is a case in which a third-party argon gas torch head is applied, and the amount of argon gas discharged from the gas cylinder is adjusted to 15 L/min as can be seen through the flow meter by adjusting the main valve. You can check this through the ball on the flowmeter.

Then, as confirmed through FIG. 12, after the test of the other company's argon gas torch head, the gas main pressure valve, etc. was left in a fixed state and replaced with the argon gas torch head of the present invention when tested, the other company's test conditions were 15 minutes per minute You can see that the gas pressure gauge on the liter (15L/min) flowmeter goes straight 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, a considerable amount of argon gas can be reduced during the main welding.

Through the comparative test as described, the argon welding torch head of the present invention can achieve a gas reduction effect of at least 40% compared to the existing product, and if the initial gas reduction effect is added, a very excellent gas reduction effect can be achieved. It can be seen that there is

The argon gas welding torch head having a gas-saving function according to the present invention is a very useful technology that can achieve an eco-friendly and cost-saving effect as it can provide an excellent gas-saving effect.

Claims

In the argon gas welding torch head,

The outer peripheral surface of the front end is made of a curved surface, the outer surface of the middle part is formed with a male thread, and the inner surface of the rear end is formed with a female thread, and a receiving groove is formed so as to be depressed from the rear end toward the front end to a predetermined depth. a head body having a plurality of gas ejection holes in which an electrode outlet communicating from the front end to the receiving groove is formed, and being inclined toward the front in communication with the receiving groove while forming equal intervals on the outer peripheral surface of the front end;

A core male screw corresponding to the female screw is formed and fastened to the outer peripheral surface of the large end, 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 discharge holes of each stage are 60 degree angle, and a flow path passing through the large end and the small end is formed along the center line, the inner diameter D1 of the first flow path formed at the small end is constant, and is formed at the front end of the large end. The inner diameter D2 of the second flow passage connected to the first flow passage is smaller than the inner diameter D1 of the first flow passage, and the inner diameter D3 of the third flow passage connected to the second flow passage is an inclined surface that increases toward the rear end. and a head core having a constant inner diameter (D4) of the third flow path and the fourth flow path connected thereto;

The core male screw is

A first male core screw in a predetermined section directly fastened to the female screw, a second male core male screw formed at a predetermined distance from the first male core screw, and a section between the first male core screw and the second male core screw made up of masters,

Argon gas welding torch having a gas saving function, characterized in that when the head core is inserted and fastened into the receiving groove of the head body, the receiving groove is formed deeper in the front than the front end of the small end of the head core to form a buffer space. head.