KR20240114062A - Flexible torch body and manufacturing method - Google Patents

Abstract

This technology relates to a flexible torch body that can improve conductivity and prevent damage due to welding, etc. during the manufacturing process. More specifically, it includes an elastic coil in the shape of a flexible pipe with a predetermined length, and an end of the elastic coil that communicates with the elastic coil. A torch head adapter having a first groove formed into which an end of the elastic coil is inserted, a gas diffuser connection socket provided symmetrically with the torch head adapter to communicate with the elastic coil and having a second groove formed into which an end of the elastic coil is inserted, and an inside of the elastic coil It is characterized by comprising a gas blocking member inserted to form a concentric circle and an insulating cover inserted to surround the elastic coil, the gas diffuser connection socket, and the outer surface of the torch head adapter.

Description

Flexible torch body and manufacturing method {Flexible torch body and manufacturing method}

This technology relates to a flexible torch body that can improve conductivity and prevent damage due to welding during the manufacturing process.

In general, gas metal arc welding is a welding process in which an arc is generated between the wire and the base material by feeding a wire, which is a consumable electrode, to the base material at a constant speed and applying electric current through the wire.

In addition, a conventional gas metal arc welder performs welding while supplying a shield gas to the welding area simultaneously with the welding wire forming the electrode, and includes a welding torch and a torch body provided at the tip of the welding torch.

As a prior art of the above-mentioned torch body, 'Torch body for carbon dioxide gas welder', which is Domestic Patent No. 10-1617145, is disclosed. Looking at the configuration of the prior art, as shown in FIG. 1, the coil 70 A metal cover is formed on the outer surface of a metal material that is more resistant to bending than the coil 70, and reinforces the bending of the coil to prevent the coil 70 from bending and breaking too easily, thereby limiting the bending angle of the coil 70. The member 80 is covered, and both ends of the coil 70 and the metal cover member 80 are connected to the outer diameter of the adapter 40 and the gas diffuser 50. Fixing rings 90 and 92 for compression and fixation are respectively fitted, and both ends of the fixing rings 90 and 92 are welded (W) to the adapter 40 and the gas diffuser 50 in a vacuum heat-treated state. After joining, the adapter 40 and the gas diffuser 50 of the torch body are characterized by being drawn and molded using aluminum.

However, in the case of the above-described prior art, the fixing ring is installed through brazing welding. In this process, welding is performed while the connecting pipe 60 made of rubber is inserted into the torch body 30, so the connection pipe 60 is installed. There are conditions in which welding using lead at temperatures below 200°C cannot be avoided because it can cause damage, and these conditions inevitably result in low conductivity.

In other words, general brazing welding must have an improvement in conductivity as welding is performed with copper materials using a high temperature of 450 to 800°C, but the conventional technology does not allow welding at the above-mentioned general temperature to prevent damage to the connecting pipe. This is because welding must be performed using lead, which has a melting point of 200°C, which is approximately 10% lower in conductivity compared to copper materials.

Domestic registered patent No. 10-1617145 (announcement date: 2016.05.02.) Domestic registration utility No. 20-0226832 (announcement date: 2001.06.15.) Domestic registered patent No. 10-1929490 (announcement date: 2018.12.14.) Domestic registered patent No. 10-1578533 (announcement date: 2015.12.17.)

In order to solve the above-described conventional problems, the present invention increases conductivity by performing brazing welding at a normal temperature without damaging the structure, and improves the contact area between the adapter installed on both sides of the coil and the gas diffuser to maximize the conductivity. The purpose is to provide a torch body.

In order to solve the technical problems of the prior art, a flexible torch body according to the present invention includes an elastic coil 100 having a predetermined length but being flexible in the shape of a pipe (PIPE), and communicating with the elastic coil 100, wherein the elastic coil (100) A torch head adapter 200 having a first groove 240 into which an end is inserted is formed, and the elastic coil 100 is provided symmetrically with the torch head adapter 200 to communicate with the elastic coil 100. A gas diffuser connection socket 300 formed with a second groove 340 into which an end is inserted, a gas blocking member 400 inserted concentrically into the elastic coil 100, the elastic coil 100, and the gas It is characterized by including a diffuser connection socket 300 and an insulating cover 500 inserted to surround the outer surface of the torch head adapter 200.

In addition, the gas blocking member 400 includes a pipe-shaped gas blocking hose 410 that blocks external leakage of gas supplied from the outside, and a gas blocking member 400 formed on the outer or inner surface to form a concentric circle in the longitudinal direction of the gas blocking hose 410. It includes a pipe-shaped metal cover tube 420 and a bushing 430 inserted into the gas diffuser connection socket 300 to support the gas blocking hose 410 and the metal cover tube 420, The bushing 430 is preferably fixed by a compressive force applied from the outside of the gas diffuser connection socket 300.

In addition, a compression groove 440 is further formed on the circumferential surface of the bushing 430, and the compression groove 440 is formed on the inner surface of the gas diffuser connection socket 300 by a compression force applied from the outside of the gas diffuser connection socket 300. It is desirable to allow some parts to be inserted and fixed to each other by shape deformation.

In addition, the elastic coil 100 inserted into the first groove 240 and the second groove 340 causes molten material to flow into the first groove 240 and the second groove 340 during brazing welding. ), it is desirable to allow it to flow in.

According to the present invention, unlike the prior art, the work method is adopted to first braze and weld the elastic coil inserted into the first groove and the second groove and then insert the gas blocking member, thereby preventing damage to the gas blocking hose during the welding process. The effect of preventing this is expected.

In addition, unlike in the past, during brazing welding, high-temperature melt flows into the first and second grooves, respectively, and hardens the elastic coil, thereby increasing the contact area, which has the effect of maximizing conductivity.

In addition, in the process of executing compression differently from the conventional method, the inner surface of the connection socket can be inserted into the compression groove formed on the outer surface of the bushing by changing the shape, which is expected to improve the fixing force to the torch body.

Figure 1 is a diagram showing a conventional torch body.
Figure 2 is a diagram showing a flexible torch body according to the present invention.
Figure 3 is a diagram showing the connection relationship between the elastic coil, torch head adapter, and gas diffuser connection socket in Figure 2.
FIG. 4 is a view showing brazing welding of FIG. 3 being performed.
Figure 5 is a cross-sectional view taken along line AA' of Figure 4;
Figure 6 is a view showing the gas blocking member of Figure 4 being installed.
Figure 7 is a view showing the insulating cover for Figure 6 being installed.
Figure 8 is a flow chart of the flexible torch body manufacturing method according to the present invention.

Hereinafter, various embodiments will be described in more detail with reference to the attached drawings. The embodiments described herein may be modified in various ways. Specific embodiments may be depicted in the drawings and described in detail in the detailed description. However, the specific embodiments disclosed in the attached drawings are only intended to facilitate understanding of the various embodiments. Therefore, the technical idea is not limited to the specific embodiments disclosed in the attached drawings, and it should be understood that all equivalents or substitutes included in the spirit and technical scope of the invention are included.

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but these components are not limited by the above-mentioned terms. The above-mentioned terms are used only for the purpose of distinguishing one component from another.

In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that it does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof. When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

In addition, when describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof is abbreviated or omitted.

Hereinafter, the flexible torch body (hereinafter simply referred to as 'torch body') according to the present invention will be described in detail with reference to the attached drawings.

First, as shown in FIG. 2, the torch body 1 according to the present invention largely includes an elastic coil 100, a torch head adapter 200, a gas diffuser connection socket 300, a gas blocking member 400, and insulation. Includes cover 500.

In more detail, as shown in FIGS. 2 to 5, the elastic coil 100 allows the gas blocking member 400, which will be described later, to be freely bent according to the gas welding portion through a torch nozzle (not shown). It is configured to enable unfolding.

For this purpose, the elastic coil 100 is formed by twisting a plurality of flexible metallic wires into a column shape multiple times to have elastic force and forming it into a pipe shape of a predetermined length having an overall spiral shape, with a metal cover pipe inside it. The gas blocking hose 410 provided with (420) can be inserted concentrically.

Both ends of the elastic coil 100 have a structure that is inserted into the first groove 240 formed on the torch head adapter 200 and the second groove 340 formed on the gas diffuser connection socket 300, and are formed to cover the outer surfaces of both sides. A pair of fixing rings 110 are fastened so that the fixing force of the elastic coil 100 can be improved.

Here, the fixing ring 110 receives heat during brazing welding and performs the function of fixing the elastic coil 100 in a soft state.

Of course, the elastic coil 100 in the present invention undergoes an assembly step in which the elastic coil 100 is fixed to the torch head adapter 200 and the gas diffuser connection socket 300 by brazing welding, so it is omitted or mentioned above as necessary. It is also possible to be provided only on one side or the other side of the outer surface of the elastic coil 100.

In addition, the torch head adapter 200 is provided on one side of the elastic coil 100 described above so that the elastic coil 100 can be connected to a torch head (not shown) to which a torch cable that supplies welding wire is connected. It includes an adapter body 210 and a first extension pipe 230.

For example, as shown, the adapter body 210 may be molded into a pipe shape with a hollow portion formed inside communicating with both ends that are open in the longitudinal direction, and one side has a through hole 220 for gas inflow on the circumferential surface. More than one is formed.

At this time, on the other side of the adapter body 210, a pair of adjacent first extension tubes 230 are protruded to form a first groove 240 into which the end of the elastic coil 100 is inserted. Among the first extension pipes 230, the first extension pipe 230 that faces the inner surface of the elastic coil 100 is preferably formed longer than the first extension pipe 230 that faces the outer surface of the elastic coil 100. Through this, the elastic coil 100 is stably coupled to the adapter body 210 and then flexible operation is possible.

In addition, the different protrusion lengths of the pair of first extension pipes 230 are based on the length of the elastic coil 100 described above being 204 mm, the protrusion length of one extension pipe 230 is 24 mm, and the protrusion length of the other extension pipe 230 is 24 mm. It is preferable that the length is 4 mm, and this can be equally applied to the pair of second extension pipes 330 described later.

In addition, the gas diffuser connection socket 300 is symmetrical to the torch head adapter 200 described above, and the other side of the elastic coil 100 is inserted and installed so that the gas diffuser (not shown) and the torch body 1 of the present invention are connected to each other. It is configured to have a connected structure and includes a socket body 310 and a second extension pipe 330.

For example, as shown, the socket body 310 is formed in the shape of a pipe so that both open sides communicate with a hollow portion formed in the longitudinal direction, and a second groove 340 for inserting the elastic coil 100 extends on one side. It is formed, and on the other side, a gas diffuser is inserted and installed inside the hollow part.

Here, the second groove 340 may be formed through a pair of second extension pipes 330 having different protrusion lengths, similar to the adapter body 210 described above, and the inner peripheral surface of the adapter body 210 may be formed by gas A coupling groove 320 may be formed for fastening to the diffuser.

And, as shown in FIG. 6, the gas blocking member 400 blocks the gas that moves through the inside of the torch body 1 when the angle of the torch body 1 is adjusted by the elastic coil 100 described above. It is configured to block gas from leaking to the outside and may include at least one of a gas blocking hose 410, a metal cover pipe 420, and a bushing 430.

For example, the gas blocking hose 410 is formed into a pipe shape with a predetermined length using rubber or synthetic resin so that it is flexible and can be freely bent and unfolded together with the elastic coil 100 described above.

For example, the gas blocking hose 410 may be molded to have the same length as the elastic coil 100, as shown, and one end inserted into the adapter body 210 has a jaw formed on the adapter body 210 ( 250) so that the insertion length can be limited.

In addition, the other end of the gas blocking hose 410 is supported by a bushing 430 that is sequentially inserted into the socket body 310, and the gas blocking hose 410 is inserted therein to form a concentric circle with the elastic coil 100. The structure is satisfied.

At this time, a band-shaped compression groove 440 is formed on the circumferential surface of the bushing 430, so that when a compression force due to external force occurs in the manufacturing method (2) described later, the inner surface of the socket body 310 is inside the compression groove 440. It is preferable that the bushing 430 be fixed inside the socket body 310 by deforming the shape so that it can be inserted into the socket body 310 and at the same time prevent leakage of gas supplied during welding.

Meanwhile, in the present invention, a pipe-shaped metal cover pipe 420 may be further provided on the outer or inner surface of the gas blocking hose 410, which is concentric with the gas blocking hose 410 and can be bent and unfolded. The metal cover tube 420 assists in preventing bending beyond a certain angle so as to minimize the stress applied to the gas blocking hose 410 due to excessive bending of the elastic coil 100.

And, as shown in FIG. 7, the insulating cover 500 is formed to have an overall pipe shape using an elastic material, and as shown, not only the elastic coil 100 and the socket body 310, but also the entire elastic coil 100 and the socket body 310 are formed. , a portion of the adapter body 210 (preferably the portion where brazing welding is performed) is provided to be surrounded, thereby providing convenience of safety accidents or gripping that may occur during work in the process of bending the elastic coil 100.

Hereinafter, the flexible torch body manufacturing method according to the present invention (hereinafter briefly referred to as the 'manufacturing method') will be described in detail with reference to the attached drawings.

First, as shown in FIG. 8, the manufacturing method (2) according to the present invention is largely 1) inserting a pair of fixing rings 110 on the outer surface of the elastic coil 100, then inserting a pair of fixing rings 110 on both sides of the elastic coil 100. Step (S10) of inserting and installing the torch head adapter 200 and the gas diffuser connection socket 300, 2) brazing welding to connect the elastic coil 100, the torch head adapter 200, and the gas diffuser connection socket ( Step (S20) of fixing the 300) to each other, 3) inserting the gas blocking hose 410 equipped with the metal cover pipe 420 into the elastic coil 100, and then additionally inserting the bushing 430 to Step (S30) of fixing the gas blocking hose 410 inside the elastic coil 100, and 4) compressing the outer surfaces of the torch head adapter 200 and the gas diffuser connection socket 300 by external force to form the elastic coil 100. It includes a step (S40) of fixing the coil 100 and the bushing 430 and then inserting them so that they are surrounded by the insulating cover 500.

To explain in more detail, in order to satisfy step 1), as shown in FIG. 3, the worker inserts the fixing ring 110 into both outer surfaces of the elastic coil 100 and places the elastic coil 100 on one side. The adapter body 210 is installed so that it can be inserted into the first groove 240, and the socket body 310 is installed on the other side so that it can be inserted into the second groove 340.

At this time, it is desirable that the first extension pipe 230 and the second extension pipe 330, each formed as a pair, are able to face the outer and inner surfaces of the elastic coil 100.

When step 1) is completed, as shown in FIG. 4, the worker performs brazing welding on the first groove 240 and the second groove 340 to satisfy step 2), and in this process, The high-temperature melt due to welding is allowed to flow into the first groove 240 and the second groove 340, thereby forming the adapter body 210, the elastic coil 100, the socket body 310, and the elastic coil ( 100) Ensure that the contact area between them is maximized.

That is, as shown, the inner surface of each of the first groove 240 or the second groove 340 and the outer surface of the elastic coil 100 are high temperature, and the elastic coil 100 is an adapter body ( 210) or the socket body 310 is contacted, but due to structural reasons of the elastic coil 100, it is applied to less than about 20% of the inserted area, so heat dissipation does not occur smoothly.

Therefore, in order to compensate for this, when the adapter body 210 and the socket body 310 provided on both sides of the elastic coil 100 are connected to each other by brazing welding, the high temperature melt generated during welding is formed in the first groove 240. By allowing it to fill and flow into the inside of the second groove 340, the above-described problem is solved (see FIG. 5).

When the above-mentioned step 2) is completed, as shown in FIG. 6, the worker moves the end of the gas blocking hose 410 equipped with the metal cover pipe 420 to the inside of the elastic coil 100 so that it can be supported on the jaw 250. and perform step 3 of sequentially inserting the bushings 430 into the socket body 310 to prevent the gas blocking member 400 from being separated.

After step 3), the worker performs a final step of pressing the pair of fixing rings 110 to secure the gas blocking member 400 in step 4).

That is, step 4) in the present invention, as shown in FIG. 7, is a compression force that applies an external force to the outer surface of the socket body 310 with the bushing 430 inside as well as the pair of retaining rings 110. In addition, the pair of fixing rings 110 on the outer surface of the elastic coil 100 due to shape deformation, as well as the bushing 430, can be fixed inside the socket body 310 to form a torch body according to the present invention ( 1) is obtained (see Figure 2).

At this time, in the case of the bushing 430, the preferred compression is applying enough compression to allow the inner surface of the deformed socket body 310 to be inserted into the compression groove 440 formed in a strip shape on the circumferential surface of the bushing 430. It is desirable.

As described above, the torch body 1 according to the present invention is different from the conventional one by first brazing and welding the elastic coil 100 inserted into the first groove 240 and the second groove 340, and then blocking the gas. As the work method of inserting the member 400 is adopted, the effect of preventing damage to the gas blocking hose 410 during the welding process is expected.

In addition, differently from the prior art, during brazing welding, high-temperature melt flows into the first groove 240 and the second groove 340, respectively, and hardens the elastic coil 100, thereby increasing the contact area and thereby increasing the conductivity. It has the effect expected to be maximized.

In addition, in the process of executing compression differently from the conventional one, the inner surface of the socket body 310 can be inserted into the compression groove 440 formed on the outer surface of the bushing 430 by changing its shape, thereby increasing the fixing force for the torch body 1. This improved effect is expected.

As described above, the present invention has been described with specific details such as specific components and limited embodiments and drawings, but this is only provided to facilitate a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , those skilled in the art can make various modifications and variations from this description.

Accordingly, the spirit of the present invention should not be limited to the described embodiments, and the scope of the patent claims described later as well as all things that are equivalent or equivalent to the scope of this patent claim shall fall within the scope of the spirit of the present invention. .

1: Flexible torch body according to the present invention
2: Method of manufacturing flexible torch body according to the present invention
100: elastic coil
110: fixing ring
200: Torchhead adapter
210: adapter body 220: through hole
230: first extension pipe 240: first groove section
250: chin
300: Gas diffuser connection socket
310: Socket body 320: Coupling groove
330: Second extension pipe 340: Second groove section
400: Gas blocking member
410: Gas blocking hose 420: Metal cover pipe
430: Bushing 440: Compression groove
500: Insulating cover

Claims (7)

An elastic coil 100 having a predetermined length and having a flexible pipe shape;
A torch head adapter 200 communicating with the elastic coil 100 and having a first groove 240 into which the end of the elastic coil 100 is inserted;
A gas diffuser connection socket 300 provided symmetrically with the torch head adapter 200 to communicate with the elastic coil 100 and having a second groove 340 into which the end of the elastic coil 100 is inserted;
A gas blocking member 400 inserted into the elastic coil 100 to form a concentric circle; and
A flexible torch body comprising: the elastic coil (100), the gas diffuser connection socket (300), and an insulating cover (500) inserted to surround the outer surface of the torch head adapter (200).
According to paragraph 1,
The gas blocking member 400 is
A pipe-shaped gas blocking hose 410 that blocks external leakage of gas supplied from the outside;
A pipe-shaped metal cover tube 420 provided on the outer or inner surface of the gas blocking hose 410 to form a concentric circle in the longitudinal direction; and
A bushing 430 inserted into the gas diffuser connection socket 300 to support the gas blocking hose 410 and the metal cover pipe 420,
A flexible torch body, characterized in that the bushing (430) is fixed by a compressive force applied from the outside of the gas diffuser connection socket (300).
According to paragraph 2,
A compression groove 440 is further formed on the circumferential surface of the bushing 430, and the compression groove 440 is formed on a portion of the inner surface of the gas diffuser connection socket 300 by a compression force applied from the outside of the gas diffuser connection socket 300. A flexible torch body characterized in that it can be inserted and fixed to each other by changing its shape.
According to paragraph 1,
The elastic coil 100 inserted into the first groove 240 and the second groove 340 allows molten material to flow into the first groove 240 and the second groove 340 during brazing welding. A flexible torch body characterized by allowing inflow.
1) After inserting a pair of fixing rings 110 on the outer surface of the elastic coil 100, inserting and installing the torch head adapter 200 and the gas diffuser connection socket 300 on both sides of the elastic coil 100;
2) fixing the elastic coil 100, the torch head adapter 200, and the gas diffuser connection socket 300 to each other by brazing welding;
3) After inserting the gas blocking hose 410 equipped with the metal cover pipe 420 into the elastic coil 100, additionally inserting the bushing 430 to connect the gas blocking hose 410 to the elastic coil (100) 100) Step of fixing it inside; and
4) The outer surfaces of the torch head adapter 200 and the gas diffuser connection socket 300 are compressed by external force to fix the elastic coil 100 and the bushing 430, and then wrapped with an insulating cover 500. A method of manufacturing a flexible torch body, comprising the step of inserting the torch body so that it is supported.
According to clause 5,
In step 1), both ends of the elastic coil 100 are assembled to be inserted into the first groove 240 formed in the torch head adapter 200 and the second groove 340 formed in the gas diffuser connection socket 300. A method of manufacturing a flexible torch body, characterized in that the contact area with the elastic coil 100 is maximized by the melt during brazing welding in step 2).
According to clause 5,
In step 4) above,
A flexible torch characterized in that the inner surface of the gas diffuser connection socket 300 can be inserted into the compression groove 440 formed on the circumferential surface of the bushing 430 during the process of pressing the outer surface of the gas diffuser connection socket 300. Body manufacturing method.

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