KR100549737B1 - Twin wire torch for carbon dioxide gas shielded arc welding - Google Patents

Abstract

The carbon dioxide gas twin wire arc welding torch of the present invention has a wire supply passage 12 formed therein along a central axis in the longitudinal direction, and a cooling fluid supply passage and a recovery passage 14 between the supply passage 12 and the outer circumferential surface thereof. 16 is further formed, the cylindrical torch body 10 having the inlet 24 and the outlet 26 of the passages (14, 16) on the outer circumferential surface; Two spring liner insertion holes 32 are formed at one side, and a welding tip fastening hole 34 communicating with these insertion holes 32 is formed at the other side, and a gas diffuser fitted to the torch body 10 is provided. 30; An insulator 50 coupled to the torch body 10; And a nozzle 60 formed in a cylindrical shape and fastened to the insulator 50, thereby preventing damage to the torch parts by forced cooling by a cooling fluid while continuing welding for a long time. It is also possible.

Description

Twin wire torch for carbon dioxide gas shielded arc welding}             

1 is a schematic perspective view of a carbon dioxide twin wire arc welding torch according to the present invention;

2 is an exploded perspective view of FIG. 1;

Figure 3a is a front sectional view of the torch body of Figure 2,

Figure 3b is a side cross-sectional view seen from the line A-A of Figure 3a,

Figure 3c is a side cross-sectional view seen from the line B-B of Figure 3a,

4A is an enlarged rear view of the gas diffuser of FIG. 2;

4B is a front sectional view of FIG. 4A;

Figure 4c is a side cross-sectional view seen from the line C-C of Figure 4b,

5 is a schematic perspective view of a conventional carbon dioxide twin wire arc welding torch,

6 is an exploded perspective view of FIG. 5;

7 is a front sectional view of the torch body of FIG. 6;

FIG. 8 is an enlarged cross-sectional view of the gas diffuser of FIG. 6.

<Description of the symbols for the main parts of the drawings>

10 --- torch body, 12 --- wire supply passage,

14 --- cooling fluid supply passage, 15 --- cooling fluid return passage,

16 --- Cooling fluid return passage, 22 --- Set screw tightening groove,

24 --- cooling fluid inlet, 25 --- cooling fluid supply line,

26 --- cooling fluid outlet, 27 --- cooling fluid return line,

30 --- gas diffuser, 35 --- jaw,

46 --- gas outlet, 50 --- insulator,

60 --- nozzle, 70 --- welded wire,

72 --- weld tips, 80 --- springliners.

The present invention relates to a carbon dioxide twin wire arc welding torch, and more particularly, to a carbon dioxide gas twin wire welding torch that is capable of continuous welding operation and prevents damage to torch parts by applying a forced air cooling or water cooling method.

Figure 5 is a schematic perspective view of a conventional carbon dioxide twin wire arc welding torch, Figure 6 is an exploded perspective view of Figure 5, Figure 7 is a front sectional view of the torch body of Figure 6, Figure 8 is an enlarged gas diffuser of Figure 6 It is sectional drawing. As shown in the drawing, the conventional carbonated twin wire arc welding torch is composed of a torch body 110, a gas diffuser 130, a nozzle 160, and the like.

In a conventional carbon dioxide twin wire arc welding torch, a torch cable (not shown) connected to a twin wire feeder (not shown) and two welding wires 170 and a spring liner 180 in a torch handle (not shown) are provided. ) Is inserted into the torch body 110. The spring liner 180 is cut to protrude approximately 20 mm from one end of the torch body 110, and the welding wire 170 is fed from the twin wire feeder to extend about 70 mm from the end of the cut spring liner 180. do. The distance between the centers of the two spring liner insertion holes 132 and the center of the two welding tip fastening holes 134 is approximately 10 mm, and the length of the spring liner insertion holes 132 is approximately 20 mm. Is formed. Then, the gas diffuser 130 is inserted into one side of the torch body 110, and then the insulator 150 having a larger diameter and cylindrical shape than the gas diffuser 130 is fastened to one side of the torch body 110. The welding tip 172 is fastened to the welding tip fastening hole 134 of the gas diffuser 130, and the nozzle 160 is insulated from the insulator 150 by a force fitting method by a spring 162 installed at an outer circumference of the nozzle 160. I am forced to). The torch body 110 of the carbon dioxide twin wire welding torch is cooled by a natural air cooling method.

In FIG. 7, the torch body 110 has a wire supply passage 112 formed therein, and a thread for fastening the insulator 150 is formed at one side thereof, and an insulation tape (circumference) of the torch body 110 is formed. 120) is wound. A through hole drilled through the center at the surface of the gas diffuser 130 shown in FIG. 8 represents a carbon dioxide gas ejection hole 146, and reference numeral 135 denotes a catch of the gas diffuser 130 inserted into the torch body 110. Indicates the jaw.

However, the conventional carbon dioxide twin wire arc welding torch of the above configuration is easily damaged by the high heat generated due to high heat input, and there are many difficulties when disassembling and assembling the torch parts immediately after welding. Also, mutual interference occurs between the twin arcs, and the welding current and voltage become unstable, and a large amount of spatter is generated, thereby degrading the welding quality. The two spring liners are easily entangled in the torch body, so that the supply of twin wires is smooth. Not only did it fail, but the high temperature generated by the welding prevented continuous welding for a long time.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to provide a carbon dioxide twin-wire arc welding torch that is easy to assemble, improve the welding quality and can be continuously welded for a long time. .

The carbon dioxide twin wire arc welding torch according to the present invention has a wire supply passage formed therein along a longitudinal central axis, and a cooling fluid supply passage and a recovery passage are further formed between the supply passage and the outer circumferential surface, A cylindrical torch body having an inlet and an outlet of the passage; Two spring liner insertion holes are formed at one side, and a welding tip fastening hole is formed at one side thereof to communicate with the insertion holes, and the gas diffuser is fitted to the torch body; An insulator coupled to the torch body; And a nozzle formed in a cylindrical shape and fastened to the insulator.

The gas diffuser is provided with at least one stop screw and a stop on one side of the outer circumferential surface, and at least one stop screw fastening groove corresponding to the stop screw and the stop is formed on the torch body.

In addition, the two spring liner insertion holes and the two welding tip fastening holes are characterized in that the distance between their centers is 12mm to 30mm, respectively.

And, the length of the spring liner insertion hole is characterized in that 25mm to 100mm.

In addition, the gas diffuser is divided into a torch body fixing part which is fitted to the torch body on the boundary of the locking projection protruding outward on the outer circumferential surface, and an insertion part whose face is processed by a face shaving. And a plurality of gas ejection holes formed through the longitudinal central axis of the gas diffuser to the other surface.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic perspective view of a carbon dioxide twin wire arc welding torch according to the present invention, Figure 2 is an exploded perspective view of FIG. 3A to 3C are views showing the torch body, FIG. 3A is a front sectional view, FIG. 3B is a side sectional view seen from line AA of FIG. 3A, FIG. 3C is a side sectional view seen from line BB of FIG. 3A, and FIG. 4A 4C is a view showing a gas diffuser, FIG. 4A is a rear view of the gas diffuser shown in FIG. 2, FIG. 4B is a front sectional view of FIG. 4A, and FIG. 4C is a side sectional view seen from the CC line of FIG. 4B. Referring to these drawings, the carbon dioxide twin wire welding torch of the present invention is composed of a torch body 10, a gas diffuser 30, a nozzle 60, and the like as in the prior art.

The torch body 10 formed in a tubular shape has a thread formed on one outer circumferential surface thereof, and a wire supply passage 12 formed therein along the central axis in the longitudinal direction. Between the wire supply passage 12 and the outer circumferential surface of the torch body 10, a cooling fluid supply passage and a recovery passage 14 and 16 are further formed to allow a cooling fluid such as air or water to flow. The torch body 10 Inlets 24 and outlets 26 of the passages 14 and 16 are formed at predetermined portions of the outer circumferential surface thereof. On the other hand, the insulating tape 20 is wound around the torch body 10.

The gas diffuser 30 has two spring liner inserting holes 32 formed at one side thereof, and a welding tip fastening hole 34 formed with threads formed at its inner circumference while communicating with these inserting holes 32 formed at the other side thereof. have. A predetermined portion of the gas diffuser 30 is formed on a predetermined portion of the outer circumferential surface of the gas diffuser 30, and one side of the gas diffuser 30 has one or more stop screws 42 on the outer circumferential surface thereof. And the torch body fixing part 36 provided with the stop jaw 44 is formed, and the other side forms the insert portion 38, which is face-cut, to form a substantially rectangular cross section. The insert 38 having a flat surface is formed with a plurality of gas ejection holes 46 passing through the longitudinal central axis of the gas diffuser 30 from one surface to the other of the insert 38. have.

A thread corresponding to the thread of the torch body 10 is formed on one inner circumferential surface of the insulator 50 made of an insulating material and aluminum, and a thread corresponding to the thread formed on the nozzle 60 is formed on the inner circumferential surface of the other side. . The nozzle 60 is made of cylindrical copper to prevent the attachment of the spatter, and a thread that can be fastened to the insulator 50 is formed on one outer circumferential surface thereof.

Next, the assembly of the carbon dioxide twin wire welding torch according to the present invention configured as described above will be described.

First, a torch cable (not shown) connected to a twin wire feeder (not shown) and two welding wires 70 and a spring liner 80 disposed inside the torch handle (not shown) are connected to the torch body (not shown). 10) is inserted into. The spring liner 80 passing through the torch body 10 is cut to protrude about 25 to 100 mm from the end of the torch body 10, and the welding wire 70 is about 70 mm from the end of the cut spring liner 80. It is fed from a twin wire feeder so as to extend to an extent. The two spring liner insertion holes 32 and the two welding tip fastening holes 34 are each formed such that the distance between the centers thereof is about 12 mm to 30 mm, and preferably about 13 mm to 15 mm. As the distance between them is increased, the welding current and voltage can be stabilized and excellent welding can be performed. The spring liner insertion hole 32 is formed to have a length of about 25 mm to 100 mm, preferably about 40 mm so as to correspond to the length of the spring liner 80 protruding from the end of the torch body 10. Then, the spring liner 80 having passed through the torch body 10 is inserted into the insertion hole 32. The longer the insertion hole 32 is, the easier it is to assemble the torch component. Next, the at least one stop screw 42 and the stop jaw 44 installed in the gas diffuser 30 enter the at least one stop screw engaging groove 22 formed in the torch body 10 to allow the torch body 10 and the gas to be inserted. The diffuser 30 is coupled to prevent tangling of the spring liner 80. Next, the screw thread formed on the inner peripheral surface of one side of the insulator 50 and the thread formed on the outer peripheral surface of the one side of the torch body 10 are fastened. The welding tip 72 is fastened to the welding tip fastening hole 34 of the gas diffuser 30 by fastening the thread formed on the outer circumferential surface of the nozzle 60 having a right-handed thread and the thread formed on the inner circumferential surface of the insulator 50. Assembly is complete.

In the present invention, the two welding wires 70 fed from the twin wire feeding device are fed along the two spring liners 80, and the two welding wires through the torch handle and the torch body 10 and the gas diffuser 30 It reaches the tip 72, it is energized by the welding tip 72, the arc welding is performed by generating an arc between the end of the welding wire 70 and the base material. The electric current flows from the twin wire feeder in the order of the torch cable, the torch handle, the torch body 10, the gas diffuser 30, the welding tip 72, and the base metal. In addition, the carbon dioxide gas which protects the weld metal from the atmosphere when welding is carried out is passed through the gas ejection hole 46 of the gas diffuser 30 through the torch cable, the torch handle and the torch body 10 from the twin wire supply device. It flows between the diffuser 30 and the nozzle 60.

The torch body 10 of the present invention is a natural air cooling method for cooling using air in the atmosphere, and for example, cooling using air or water supplied from an air compressor (not shown) or a water cooling device (not shown). Cooled by forced air cooling or forced water cooling. Accordingly, the cooling fluid such as compressed air or cooling water is introduced into the supply passage 14 through the cooling fluid inlet 24 through the cooling fluid supply pipe 25, and passes through the return passage 15 to the molten pool (not shown). Arc heat, which is heat transfer from the cooling chamber, in the form of conduction, convection and radiation. Subsequently, the flow is reversed, and the cooling fluid is recovered through the recovery pipe 27 via the recovery passage 16 and the fluid outlet 26.

On the other hand, the present invention described above is not limited to the above embodiments, it can be carried out through various applications and modifications within the scope of the invention disclosed by the appended claims.

According to the carbon dioxide twin wire arc welding torch of the present invention, by applying a cooling method for forced circulation of the cooling fluid, not only long-term continuous welding is possible but also damage of the torch parts can be prevented. The torch parts can be easily assembled by lengthening the length of the spring liner insertion hole, and the welding screw can be smoothly supplied by combining the stop screw and the stop jaw formed in the gas diffuser with the torch body to prevent tangling of the spring liner. have. In addition, by increasing the spacing of the welding tip does not cause mutual interference between the twin arc can stabilize the welding current and voltage and improve the welding quality.

Claims (5)

A wire supply passage 12 is formed inside the central axis in the longitudinal direction, and a cooling fluid supply passage and recovery passages 14 and 16 are formed between the supply passage 12 and the outer circumferential surface. A cylindrical torch body 10 having an inlet 24 and an outlet 26 of 14 and 16; Two spring liner inserting holes 32 are formed at one side, and a welding tip fastening hole 34 communicating with these inserting holes 32 is formed at the other side, and the gas to be inserted into the torch body 10 is formed. Diffuser 30; An insulator (50) coupled to the torch body (10); In the carbon dioxide twin-wire arc welding torch formed in a cylindrical shape, comprising a nozzle (60) coupled to the insulator (50), The gas diffuser 30 is provided with one or more stop screws 42 and stop jaw 44 on one side of the outer circumferential surface, and the torch body 10 corresponds to the stop screw 42 and stop jaw 44. Carbon dioxide gas twin wire arc welding torch characterized in that the above stop screw fastening groove 22 is formed. delete 2. The carbon dioxide gas twin wire arc welding torch of claim 1, wherein the two spring liner insertion holes 32 and the two welding tip fastening holes 34 each have a distance between their centers of 12 mm to 30 mm. . 4. The carbon dioxide twin wire arc welding torch of claim 3, wherein the spring liner insertion hole has a length of 25 mm to 100 mm. The torch body fixing part 36 according to any one of claims 1 to 4, wherein the gas diffuser 30 is fitted to the torch body 10 by a locking projection 35 protruding outward on an outer circumferential surface thereof. And an outer circumferential surface are partitioned into inserts 38 which are face-cut, and the inserts 38 having a flat surface are penetrated through the longitudinal central axis of the gas diffuser 30 from one surface to the other surface. Carbon dioxide gas twin wire arc welding torch, characterized in that a plurality of gas ejection holes 46 are formed.

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