KR102495759B1 - A welding torch - Google Patents

Abstract

The present invention provides a welding torch comprising: a main body having an electrode rod cap, to which a rear end of an electrode rod is fixed, coupled to a rear end, having the electrode rod arranged therein to penetrate a fore-end, and having a connection pipe for the supply of power and gas coupled to one portion to discharge supplied gas via the inside to the fore-end; and a nozzle coupled to the fore-end of the main body, having the fore-end of the electrode rod arranged therein and generating an electric arc so that a body part having gas and power supplied thereto and a socket part having the nozzle assembled to a fore-end while penetrating and supporting one portion of the electrode rod can form the main body while being integrated, thereby simplifying the structure and improving the contact performance of gas with the body part to maximize cooling efficiency. The main body includes: a body part having the electrode rod cap, to which the rear end of the electrode rod is fixed, coupled to the rear end, having the connection pipe for the supply of power and gas spatially connected to one portion and having the shape of a pipe with a hollow fore-end and a hollow rear end to transmit power and gas; and a socket part provided integrally with the body part, penetrated and supported by the electrode rod, supplying gas, which is supplied into the body part, toward the fore-end, and having the nozzle coupled to the outer side surface of the fore-end.

Description

A welding torch}

The present invention relates to a welding torch configured to perform arc welding by generating an arc between an electrode and a base material while supplying an inert gas such as argon or helium.

Specifically, it is provided economically through structural simplification by integrating a main body to which gas and power are supplied and a socket provided at the front end of the main body and configured to deliver gas to a nozzle bound to the front end while penetrating and supporting a portion of the electrode. It relates to a welding torch that can be used.

More specifically, it relates to a welding torch designed to improve the structural stability of a main body by increasing the contact area and contact time of gas to the main body to improve cooling efficiency.

In general, TIG welding is a welding method using electricity and gas at the same time, generating an arc between an electrode and a base material by supplying power in an inert gas such as argon or helium to weld the base material. It is one of the welding methods.

Tig welding is used for welding thick plates such as low-temperature molten steel and heat-resistant alloys because the amount of gas components is small and a clean, high-quality welded part can be obtained, and is suitably applied to welding of high toughness and high strength.

Such TIG welding uses a torch for supplying gas and power, and the welding torch generates an arc while an electrode made of tungsten or the like is inserted, thereby generating a nozzle for generating sparks for welding, an inert gas, and It consists of a main body that is connected to a cable that supplies power and serves as a handle for welding.

In Korean Patent Publication No. 10-2009-0070579, a welding torch composed of a head part, a body part, and a holder part has a configuration in which a plurality of ventilation holes are formed on the lower circumferential surface of the holder part, and the ventilation holes are formed in the holder part. It is formed obliquely to have a slope on the circumferential surface and is connected to the inside of the welding rod to correspond to the ventilation hole formed in the lower part of the holder portion. A supply pipe for supplying argon gas, power, cooling water, etc. is formed by extending to the location where the ventilation hole is formed. there is.

However, since the welding torch has a structure in which the size of the crater of the nozzle generating the flame is standardized to have nozzles of different crater sizes for each torch corresponding to the welding target and welding area, workers using the torch There is a hassle of having to provide one or more torches each having a usable crater size for the welding target and welding area.

In addition, when the welding target and welding area are changed, there is a problem in that usability is significantly reduced, such as causing additional cost as the torch must be provided again.

In addition, the electrode for arc generation is inserted into the torch while being supported by the collet chuck. Since the electrode has a structure in which the support area of the electrode is usually supported in the form of point contact, when high heat is generated due to the nature of the torch, the electrode is supported in the form of point contact. There is a structural problem that welding cannot be easily performed because the bearing capacity is lowered due to thermal deformation of the part, and thus the electrode can move during welding.

In addition, since the gas injected toward the nozzle has a structure in which the injection direction is injected in a straight forward direction, an arc flame is generated directly inside the nozzle, so that the nozzle is easily heated to a high temperature, and heat is conducted to the main body by the heating action. cannot continuously perform welding, and has a problem of causing safety accidents such as burns or fire to a worker using a torch due to high heat generated from the main body.

On the other hand, in Korean Patent Registration No. 10-1780448, as is known in the publication, as a welding torch, a hollow body tube is formed, and a first inclined surface narrowed forward is formed inside the body tube. a main body to which gas and power are supplied through a second connecting pipe connected to the inner space of the body pipe; Assemble the collet chuck into which the electrode is inserted into the main body, but in the process of assembling the collet chuck into the main body, the second inclined part provided on the outer circumference of the collet comes into contact with the first inclined surface to press the collet an electrode cap for adjusting the electrode inserted into the chuck to an arbitrary protruding length and then supporting and fixing the electrode; Any one of a plurality of nozzles is connected to the other end of the electrode cap using a socket to generate sparks for welding using supplied gas and power, and the plurality of nozzles have different diameters corresponding to standardized crater sizes. A detachable groove having a is formed, and the nozzle is provided with a detachable portion formed in an assemblable size corresponding to the detachable groove and replaces any one of a plurality of nozzles in one torch through the assembly structure of the detachable groove and the detachable portion. A welding torch is described that includes an enabling head.

Korean Patent Publication No. 10-2009-0070579 Korean Patent Registration No. 10-1780448

However, the conventional welding torch as described above is provided with a main body to which gas and power are supplied, and a socket provided at the front end of the main body and configured to deliver gas to a nozzle bound to the front end while penetrating a portion of an electrode rod. Since it consists of an assembly structure that is bound after being bound, it is structurally complex and inconvenient to manufacture and assemble, resulting in low productivity and uneconomical problems.

In addition, there is a problem in that a structural problem that is easily damaged by heat transfer to the main body by a flame generated from a nozzle occurs.

The present invention has been proposed to solve the above conventional problems, and an object of the present invention is to perform arc welding by generating an arc between an electrode and a base material while supplying an inert gas such as argon or helium. , It is possible to economically provide through structural simplification by integrating a body to which gas and power are supplied and a socket provided at the front end of the body and passing gas to a nozzle bound to the front end while penetrating and supporting a portion of the electrode. Of course, in particular, it is to provide a welding torch to improve the structural stability of the main body by increasing the contact area and contact time of the gas to the main body to improve the cooling efficiency.

In the welding torch according to the present invention for achieving the object of the present invention as described above, the electrode rod cap to which the rear end of the electrode rod is fixed is bound at the rear end, and the electrode rod is disposed to pass through the front end, and the power source and a main body in which a connection pipe through which gas is supplied is bound, and the supplied gas is discharged to the front end via the inside; In a welding torch comprising a; nozzle bound to the front end of the main body and configured to generate an arc while the front end of the electrode is disposed therein; The main body has a 'tube' shape in which the front and rear ends are hollow so that the electrode cap to which the rear end of the electrode is fixed is bound to the rear end, and a connection tube through which power and gas are supplied is spatially connected on a part to transfer power and gas. a body portion; It is provided integrally with the body portion, the electrode rod is supported while penetrating the body portion, and a socket portion for supplying gas supplied to the inside of the body portion toward a tip side and binding the nozzle to an outer surface of the tip portion; characterized in that it comprises a.

The welding torch according to the present invention made as described above is provided at the front end of the main body to which gas and power are supplied, and a socket configured to deliver gas to a nozzle bound to the front end while penetrating a portion of the electrode rod is integrated. It has an effect that can be provided economically through structural simplification.

In addition, as the body portion is efficiently cooled through the cooling action by the gas supplied to the nozzle through the socket portion, the cooling efficiency over the entire area of the body is improved, thereby improving the structural stability of the body.

1 is a schematic illustration showing a welding torch according to an embodiment according to the present invention.
2 and 3 are some excerpts schematic illustration showing a welding torch according to this embodiment.
Figure 4 is a schematic illustration showing an example of a discharge pipe constituting a welding torch according to the present embodiment.
5 and 6 is a schematic illustration showing the working state of the welding torch according to this embodiment.
7 to 9 are schematic diagrams showing a drilling process for forming a discharge conduit in the main body constituting the welding torch according to the present embodiment.

Hereinafter, a welding torch according to a preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the examples described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Accordingly, the shapes of elements in the drawings may be exaggerated to emphasize a clearer explanation. It should be noted that in each drawing, the same members are sometimes indicated by the same reference numerals. Detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention are omitted.

1 to 9 are views showing a welding torch 1 according to an embodiment according to the present invention, in the welding torch 1 according to this embodiment, the rear end of the electrode 4 is fixed at the rear end. The electrode rod cap 5 is bound, and the electrode rod 4 is disposed to pass through the front end, and the connection pipe 3 to which power and gas are supplied is bound on a part, and the supplied gas passes through the inside to the front end A body 2 configured to be discharged into; It includes a nozzle 6 bound to the front end of the main body 2 and configured to generate an arc while the front end of the electrode 4 is disposed therein.

That is, the main body 2 to which gas and power are supplied, the electrode rod cap 5 to support and fix the electrode rod 4 after adjusting it to an arbitrary protruding length, and the gas supplied through the main body 2 and It consists of the nozzle 6 from which sparks are generated to perform welding using a power source.

In the welding torch 1 according to this embodiment, the main body 2 has an electrode cap 5 to which the rear end of the electrode 4 is fixed at the rear end, and power and gas are supplied to a portion thereof. a body part 21 in the shape of a 'tube' having hollow front and rear ends so that the connection pipe 3 is spatially connected to receive power and gas; It is provided integrally with the body part 21 and the electrode rod 4 is supported while penetrating, and supplies the gas supplied into the body part 21 toward the front end, and the nozzle 6 is provided on the outer surface of the front end. A socket portion 22 that is coupled; includes.

That is, the main body 2 is formed by integrating the body part 21 to which gas and power are supplied and the socket part 22 integrally provided in the body part 21, and economical through structural simplification. will be provided with

In addition, as the socket portion 22 and the body portion 21 are efficiently cooled through a cooling action by the gas supplied to the nozzle 6 passing through the socket portion 22, the body 2) to improve the cooling efficiency over the entire area.

Accordingly, the structural stability of the main body 2 during use is improved.

In the above, the body part 21 and the connection pipe 3 may be assembled through the cover 7 when the entire exterior is wrapped with a certain thickness in a state in which they are spatially connected to each other.

That is, the body portion 21 and the connection pipe 3 may be integrally formed by injection molding while being disposed inside the cover 7 .

In the above, a plurality of binding recesses 211 may be formed on the outer circumferential surface of the body portion 21 to be bound while the inner portion of the cover 7 is inserted in during injection molding of the cover 7 .

That is, when the main body 2 and the cover 7 are assembled by injection molding, a strong binding force is formed by the coupling recesses 211 to prevent unauthorized separation or flow, thereby securing safety in use. there is.

In the above, the cover 7 may be made of a non-metallic material such as rubber or urethane to insulate power supplied to the main body 2 and heat generated during welding; A handle part 71 to be directly grasped by the operator may be provided on a part; The handle portion 71 may be formed in a portion surrounding the outer circumferential surface of the connection pipe 3; As for the configuration and structure, a configuration and structure selected by the user from among conventionally known technologies may be suitably applied.

At the end of the connection pipe 3, a gas cable through which gas flows and a power cable through which electricity flows are coaxially connected to each other, and gas and power are supplied through the coaxially connected gas cable and the power cable to the main body. (2) can be supplied.

In the welding torch 1 according to this embodiment made in this way, the electrode rod cap 5 is bound to the rear end of the electrode rod 4 and bound to the rear end of the body portion 21, and both ends are hollow ' a joint tube 51 of a 'tube' shape; The tip of the joint pipe 51 is screwed while adjusting the coupling depth, and the electrode rod 4 is supported while penetrating, and the pressing force acts while being in close contact with the inner circumferential surface of the body portion 21, so that the electrode rod inserted into the inside ( 4) may include a collet chuck 52 that is fixedly supported after adjusting the projecting length to an arbitrary length.

On the other hand, the body portion 21 is formed with an inner inclined surface 212 in which the front portion is gradually narrowed in the hollow interior; At the front end of the collet chuck 52, a plurality of cutouts 521 having an outer inclined surface may be formed on an outer circumferential surface so as to be elastically supported while being compressed inward by a pressing action against the inner inclined surface 212.

That is, the electrodes 4 may be fixedly supported by strong pressure while the incisions 521 are compressed while being compressed by the inner inclined surface 212 of the body 21 .

In addition, by inducing a 'Venturi effect' by forming a shape gradually narrowing forward through the inner inclined surface 212 inside the body portion 21, the flow rate of the gas discharged toward the nozzle 6 is reduced. It can be raised to make the gas flow more smooth.

In the welding torch 1 according to the present embodiment made as described above, the socket portion 22 has a plurality of discharges configured to discharge gas from the inside of the body portion 21 to the inside of the nozzle 7 Conduits 221 are formed.

That is, welding sparks are formed in the nozzle 6 by supplying the gas passing through the discharge conduit 221 to the inside of the nozzle 6 while guiding it into the inside of the body 21 .

In the welding torch 1 according to the present embodiment made as described above, the discharge conduit 221 is formed while having an inclination angle from the inside of the body portion 21 to the outside of the socket portion 22.

That is, each of the discharge conduit 221 is formed while penetrating the inside of the body part 21 and the socket part 22, respectively, and the gas introduced into the inside of the body part 21 is passed through the socket part 22. ) moves while cooling the inside of the body part 21 and the socket part 22, respectively, while being discharged to the outside of the body part 21 through the cooling action by the gas To efficiently cool the body part 21 Accordingly, by improving the cooling efficiency over the entire area of the body 2, the structural stability of the body 2 is improved.

In the above, the discharge conduits 221 may be formed in 4 to 6 at equal intervals, respectively, with the center of the main body 2 as the center; The number can be selected by the user and applied appropriately.

On the other hand, in the welding torch 1 according to this embodiment, the discharge conduit 221, after the body portion 21 and the socket portion 22 are integrally manufactured, the body portion 21 It may be molded through a punching process in the form of entering at an inclined angle toward the socket portion 22 while crossing the center of the main body 2 from the inside of the rear end.

That is, consistency and standardization of the drilling work of the discharge conduit 221 is possible to improve manufacturing efficiency, as well as to form the inclination angle of the discharge conduit 221 as small as possible, so that the body portion of the gas ( 21) and the internal contact area and contact time for the socket part 22 can be efficiently implemented.

In the welding torch 1 according to the present embodiment made as described above, the outer circumferential surface of the socket portion 22 is screwed into the nozzle nut groove 61 formed on the inner surface of the rear end of the nozzle 6 and the socket screw portion (222) may be formed.

That is, the nozzle nut groove 61 can be assembled by being screwed into the socket screw portion 222, and various nozzles 6 having various configurations and structures can be selectively assembled and applied.

Accordingly, usability can be improved.

As described above, in the welding torch 1 according to the present embodiment, while penetrating and supporting a portion of the body portion 21 and the electrode rod 4 to which gas and power are supplied, the nozzle 6 is attached to the front end. The feature of the technical configuration is that the socket part 22 to be assembled is integrated to form the main body 2, thereby maximizing the cooling efficiency by simplifying the structure and improving the contact performance of gas with respect to the body part 21. to be

One embodiment of the present invention described above is only exemplary, and those skilled in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. . Therefore, it will be well understood that the present invention is not limited to the forms mentioned in the detailed description above. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents and alternatives within the spirit and scope of the present invention as defined by the appended claims.

1: Welding torch
2: main body 21: body part
211: binding recess 212: inner slope
22: socket part 221: discharge pipe
222: socket screw part
3: connection pipe 4: electrode
5: electrode cap 51: joint tube
52: collet chuck 521: incision
6: nozzle 61: nozzle nut groove
7: cover 71: handle

Claims (1)

A nozzle 6 configured to generate an arc while the front end of the electrode 4 is disposed therein; The electrode cap 5 to which the rear end of the electrode 4 is fixed is bound to the rear end, and the connection pipe 3 through which power and gas are supplied is spatially connected on a part of the electrode, and the supplied gas is discharged to the front end through the inside. It is integrally formed at the front end of the body portion 21 with a hollow front and rear end of the body portion 21 and the front end of the body portion 21 so that the electrode rod 4 is supported while penetrating into the body portion 21. A main body 2 having a socket part 22 to which the nozzle 6 is coupled so that the supplied gas is supplied in the direction of the front end and the arc is generated on the outer surface of the front end. In (1);
In the socket portion 22,
A plurality of discharge conduits 221 are formed to discharge gas from the inside of the body 21 to the inside of the nozzle 6;
The discharge conduit 221,
After the body part 21 and the socket part 22 are integrally manufactured, from the inside of the rear end of the body part 21 to the side of the socket part 22 while crossing the center of the body 2 It is molded through a drilling process in the form of entering at an inclined angle, and is formed while having an inclined angle from the inside of the body portion 21 to the outside of the socket portion 22, centering on the center of the body 2 4 A welding torch, characterized in that ~ 6 are formed at equal intervals.

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