KR101532176B1

KR101532176B1 - CO2 Welding Torch

Info

Publication number: KR101532176B1
Application number: KR1020140111681A
Authority: KR
Inventors: 김경수
Original assignee: 김경수
Priority date: 2014-08-26
Filing date: 2014-08-26
Publication date: 2015-06-26

Abstract

The present invention relates to a torch for CO2 welding and more particularly to a torch body 1 in which a connecting portion 22 at one end of a gas diffuser 2 is assembled with a connecting hole 11 at one end and a torch cable 101 is assembled at the other end, A torch handle 3 provided outside the torch body 1 and incorporating a tracer for allowing a user to operate the supply of CO2 gas and welding wire; An insulating tube 103 assembled at one end of the insulating tube 103 to enclose the gas diffuser 2 and the tip 102. The insulating tube 103 is screwed into the outer periphery of the gas diffuser 2, A torch for CO2 welding comprising a cylindrical nozzle (104), wherein a connecting hole (11) at one end of the torch body (1) is formed to a predetermined depth and then a locking projection (12) So that the connection portion 22 at one end of the gas diffuser 2 is inserted into the connection hole 11 and is engaged by the engagement protrusion 12 The connecting portion 22 of the gas diffuser 2 is integrally formed with the support shaft 23 in sequence by an eccentric shaft 24 having a space 24 ' And a shank 27 is formed on one side of the entry shaft 25 to provide a CO2 welding torch. The gas diffuser can be conveniently assembled and disassembled by a one-touch coupling method using a torch body , And also provides the effect of welding to corners and corners while preventing leakage of gas to the connection portion between the torch body and the gas diffuser.

Description

CO2 welding torch {CO2 Welding Torch}

The present invention relates to a torch for CO2 (carbon dioxide) welding, and more particularly, to a torch for welding a gas diffuser from a torch body while preventing a gas leakage due to a firm sealing effect of the assembly connecting portion, The present invention relates to a torch capable of flexibly stretching a torch body so as to perform welding at various positions (angles).

Typically, a CO2 welding torch is a welding device that improves welding quality by preventing the oxidation of molten metal by shielding the welds from the atmosphere by releasing CO2 gas between the welding wire and the base material while supplying the welding wire.

7, the connecting portion 22 of the gas diffuser 2 having a plurality of diffusion holes 21 is assembled at one end of the connecting hole 11, and the torch cable A torch body 1 which is built outside the torch body 1 and incorporates a tracer (not shown) for allowing the user to operate the supply of the CO2 gas and the welding wire, An insulator 103 which is screwed into the outer periphery of the gas diffuser 2 and a tip 102 which is assembled at one end of the gas diffuser 2; And a cylindrical nozzle 104 which is assembled at one end and surrounds the gas diffuser 2 and the tip 102.

The conventional torch for CO2 welding machine described above has been consistently pointed out that there is a problem that assembly and replacement of a gas diffuser in a torch body is very difficult due to various reasons and that gas is leaked to the assembly connection portion .

A torch for a conventional CO2 welding machine is constructed by connecting a connecting portion 22 at one end of a gas diffuser 2 to a connecting hole 11 at one end of the torch body 1, A thread groove 201 corresponding to the thread groove 201 of the upper torch body 1 is formed in the connecting portion 22 at one end of the gas diffuser 2, In this case, there is a high possibility that the gas will leak therebetween due to the coupling tolerance which is essential for easy joining of the screw groove 201 and the screw thread 202. In addition, It was not only troublesome because of tightening and loosening but also had a problem that it was easily loosened even when it was a little loose.

Meanwhile, there is a method for preventing gas leakage by the above-mentioned screw coupling method, in which a fluororesin (usually referred to as Teflon tape) is wound around the outer periphery of a thread of a conventional gas diffuser for airtight purposes, However, due to the characteristics of the torch which generates high heat, there is a problem that the fluororesin melts due to the high heat during continuous use for a long time and the airtightness function is lost, so that the gas leakage which is the above problem can not be solved, The problem of difficulty in screwing due to the winding thickness of the fluoropolymer at the time was also present.

In addition, the conventional method of screwing the torch body and the gas diffuser has a problem in that, due to the above-mentioned reason, fine spatters generated during the welding work penetrate through the tolerance formed between the thread groove and the thread Which causes problems in welding the screw groove and the thread, which may interfere with the thread relief of the gas diffuser from the torch body during the replacement of the gas diffuser in the future, and may also cause the screw groove and the thread to break during the forced disassembly. It was a problem that caused the whole torch body to be incapable of use or full replacement, and it had a cost burden.

In addition, since the conventional torch body is formed by shaping the shape of the torch body, there is no stretchability, and there is a problem that welding is not easy when welding the corners or corner portions of the workpiece, and inconvenient and efficient welding can not be performed.

Korean Utility Model Registration No. 0231297

SUMMARY OF THE INVENTION It is an object of the present invention to provide a one-touch coupling method in which a gas diffuser can be easily inserted and removed at one end of a torch body, thereby enabling connection and disconnection of a gas diffuser from a torch body And further, the torch body is constituted by a flexible tube to provide workability to corner, corner portion, and the like.

The CO2 welding torch of the present invention, which is presented as a solution to the above-mentioned problems,

A torch body 1 in which a connection portion 22 at one end of the gas diffuser 2 is assembled into a connection hole 11 at one end and a torch cable 101 is assembled at the other end; A torch handle 3 having a tracer (not shown) for allowing a user to manipulate the supply of CO 2 gas and welding wire, a tip 102 assembled at the other end of the gas diffuser 2, A cylindrical nozzle 104 which is assembled at one end of the insulating tube 103 and surrounds the gas diffuser 2 and the tip 102, and an insulating tube 103 which is screwed to the outer periphery of the gas diffuser 2; In the CO2 welding torch,

A connecting hole 11 at one end of the torch body 1 is formed at a predetermined depth and then a locking protrusion 12 is formed on the center of the inner periphery of the torch body 1, (12) in a state of being inserted into the insertion hole (11)

The connecting portion 22 of the gas diffuser 2 is formed by an eccentric shaft 24 and an entry shaft 25 for securing a certain space 24 'with the support shaft 23, And an O-ring groove 26 on which the O-ring 26 'is seated is formed and a shank 27 is formed in the longitudinal direction of the outer periphery of the entering shaft 25.

The present invention is characterized in that the flexible tube 1c is formed by joining the torch body 1 with the connector 1b having the connecting holes 1a formed at both side ends thereof.

As described above, the present invention is advantageous in that a one-touch coupling method in which a torch body and a gas diffuser are simply fitted and pulled out is provided, so that mutual connection and disassembly can be performed quickly, conveniently, and easily under any circumstances. O ring is installed at the connection part of the torch body to maximize the prevention of gas leakage and the torch body can be constituted as a flexible tube so as to maximize workability in corner or corner area.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial cross-
2 is an illustration of a gas diffuser presented in the present invention,
FIG. 3 is an enlarged example of a "
FIG. 4 is a partial enlarged view showing an example of a partial enlargement using a cross-sectional view of FIG.
FIG. 5 is a view illustrating a state in which a gas diffuser and a torch body are connected to each other using a cross-sectional view taken along the line II-II '
Fig. 6 is another embodiment of the present invention,
7 is a partial cross-sectional exemplary view showing a conventional CO2 welding torch,
FIG. 8 is an enlarged view of a portion "B". FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

In the following description, the abbreviations or abbreviations for known technologies which may be considered to blur the gist of the present invention are to be abbreviated or abbreviated, and the names of components having the same configuration and function among the components used in the present invention are denoted by a single code and name, .

Before a detailed description of the present invention, a typical CO2 welding torch is a torch body in which a connection portion 22 at one end of a gas diffuser 2 is assembled with a connecting hole 11 at one end and a torch cable 101 is assembled at the other end A torch handle 3 having a tracer (not shown) built in the torch body 1 and allowing the user to operate the supply of the CO2 gas and the welding wire; An insulating tube 103 assembled at the outer periphery of the gas diffuser 2 to form a gas diffusion member 2 assembled at one end of the insulating tube 103, And a cylindrical nozzle 104 surrounding the tip 102.

Accordingly, in the conventional CO2 welding torch of the present invention, the connecting hole 11 at one end of the torch body 1 is formed to a predetermined depth, and then the locking protrusion 12 is formed on the center of the inner periphery of the torch body 1 So that the connection of the gas diffuser (2) is made by the engagement protrusion (12) while the connection part (22) of the gas diffuser (2) is inserted into the connection hole (11).

Here, the connection hole formed at one end of the torch body is formed to have a depth to the extent that the connection portion of the gas diffuser is normally inserted, and at the same time, a locking protrusion formed by a punching operation from the outside to the inside is protruded .

The connecting portion 22 of the gas diffuser 2 is formed of a supporting shaft 23, an eccentric shaft 24 and an inlet shaft 25 and then an O-ring 26 And a shank 27 is formed in the longitudinal direction of one side of the outer periphery of the entry shaft 25. The shank 27 is formed in the shape of a circle.

Here, the support shaft, the eccentric shaft, and the entry shaft are sequentially formed integrally in the one direction from the center of the gas diffuser, and at the same time, the eccentric shaft is formed to be smaller than the diameter of the support shaft and the entry shaft, A space 24 'formed by the eccentric shaft is provided between the support shaft and the entry shaft, and a crescent-shaped space 24' is formed in which the center portion is widened and both sides are gradually narrowed.

For reference, the support shaft and the entry shaft are formed to have the same diameter as the connection hole at one end of the torch body.

2, the shank formed on the outer periphery of the entry axis is formed by slightly cutting one side of the outer periphery of the entry axis in the longitudinal direction of the entry axis, It is preferable to cut it to a width enough to avoid the locking protrusion formed inside the connection hole.

As described above, the present invention is characterized by the connection structure of a gas diffuser in a torch body in a conventional CO2 welding torch, and the connection structure thereof will be described below.

For reference, the action (welding method) on the torch for CO2 welding is not related to the features of the present invention and will be omitted.

In general, the CO2 welding torch constitutes a gas diffuser at one end of the torch body as described above. In this case, the conventional gas diffuser has various problems described in the background art due to its assembly by screwing.

However, the present invention adopts a one-touch coupling method in which the gas diffuser is simply inserted into and withdrawn from the torch body, thereby completely solving the conventional problems.

In detail, the CO2 welding torch according to the present invention is assembled and connected by a method of inserting a connecting portion of one end of a gas diffuser into a connecting hole at one end of a torch body as shown in FIG. 3,

The shank of the entry shaft formed at the connection portion of the gas diffuser and the engagement protrusion formed in the connection hole at one end of the torch body are inserted in a line.

Then, by the shank formed by cutting slightly, the entry shaft is inserted at a certain depth without being interfered with the engagement projection of the connection hole, and at the same time, the engagement projection engages with the support shaft on one side of the entry shaft, (The widest position of the space).

When the connection of the gas diffuser is completed, the gas diffuser rotates so that the locking protrusion located in the space of the eccentric shaft is forcedly inserted between the eccentric shaft that is eccentrically rotated and the inner circumference of the connection hole, Let the connection be made.

In other words, the connection portion of the gas diffuser is inserted into the connection hole of the torch body as described above, so that the engagement protrusion in the connection hole is caught by the support shaft, and is positioned as shown in FIG.

At the same time, the eccentric rotation of the gas diffuser causes the eccentric rotation of the eccentric rotary shaft to be interlocked between the eccentric rotary shaft and the inner circumference of the connecting hole of the torch body as shown in (b) of FIG. 5, .

For reference, the space formed by the eccentric rotation shaft has a wide central portion and both sides gradually become narrower. Therefore, when the eccentric rotation shaft eccentrically rotates, the space becomes narrower and the locking protrusion is forced between the ridges in the connection hole.

As described above, since the present invention provides a one-touch assembly method of inserting the connecting portion of the gas diffuser into the connecting hole of the torch body and then rotating the connecting portion of the gas diffuser at a constant angle, the assembly and disassembly of the gas diffuser from the torch body is very fast and convenient .

According to another embodiment of the present invention, since the torch body can be constructed as a flexible tube, it is possible to exert workability to corner, corner, and the like as much as possible.

Here, the flexible tube has a connector having the above-described connection holes at both ends thereof, so that the gas diffuser and the torch cable can be assembled and connected.

While the present invention has been described in connection with certain exemplary embodiments, it is evident that many modifications and alterations can be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: Torch body 11: Connecting hole
12: Stopper 1a: Connection hole
1b: Connector 1c: Flexible tube
101: Torch cable 102: Tip
103: insulating tube 104: nozzle
2: gas diffuser 21: diffuser
22: connection part 23: support shaft
24: eccentric shaft 24 ': space
25: entry shaft 26: O-ring groove
26 ': O-ring 27: Shank
3: Torch handle

Claims

A torch body 1 in which a connection portion 22 at one end of the gas diffuser 2 is assembled into a connection hole 11 at one end and a torch cable 101 is assembled at the other end; A tip 102 assembled at the other end of the gas diffuser 2, and a gas diffusion member 102 connected to the gas diffuser 2, A cylindrical nozzle 104 which is assembled at one end of the insulating cylinder 103 and surrounds the gas diffuser 2 and the tip 102; In the welding torch,
A connecting hole 11 at one end of the torch body 1 is formed at a predetermined depth and then a locking protrusion 12 is formed on the center of the inner periphery of the torch body 1, (11) so as to be engaged with each other by the locking protrusion (12)
The connection portion 22 of the gas diffuser 2 is sequentially integrated with the support shaft 23 and the eccentric shaft 24 having the space 24 'at one side thereof and the entry shaft 25, And a shank (27) is formed on the flange (12).

The method according to claim 1,
And an O-ring groove (26) in which an O-ring (26 ') is seated is formed at the outer periphery of the entrance shaft (25).

The method according to claim 1,
And a flexible tube (1c) formed by joining the torch body (1) with a connector (1b) having connection holes (1a) formed at both side ends thereof.