KR101617147B1 - Air gouging torch - Google Patents

Abstract

In the present invention, the torch head is made of an aluminum alloy to reduce the weight of the torch, and a coupler is fastened between the torch head and the cable so as to prevent twisting of the cable during the operation, Provide gouging torch.
In order to achieve the above object, the present invention provides a torch head comprising: a torch head; a lever which is pivotally mounted on the upper surface of the torch head in a state of being hinged to the hinge; and a spring installed between the torch head and the lever, And a cable for supplying current and air to the torch head of the torch portion, wherein the torch head is formed by drawing by using aluminum. It is a technical object of the present invention to provide an air gouging torch head.

Description

AIR GOINGING TORCH < RTI ID = 0.0 >

More particularly, the present invention relates to a gouging torch, and more particularly, to a torch head made of an aluminum alloy to realize a light weight torch. In addition, a coupler is fastened between a torch head and a cable, So that the worker's wrist is not clogged.

Generally, the air gouging cutting operation generates an arc (ARC) between the electrode (gouging carbon rod) and the base material (steel plate), and melts the melted metal by the high-speed air flow (AIR) supplied equilibrium to the gouging carbon rod It is applied to various fields such as grooving of welded parts, removal of welded parts, cutting and drilling of holes by blowing off metal.

When the gouging carbon rod is contacted with the surface of the steel sheet to be cut, an arc is generated and the steel sheet starts to melt by the arc of high temperature. At this time, in order to effectively remove the melted steel sheet, Air is supplied in the direction of equilibrium with the gouging carbon rods to blow out molten metals.

A representative prior art related to the above-described air gouging torch is an example of Korean Patent Application Publication No. 10-2011-0136445 (hereinafter referred to as prior art).

The prior art is a gouging torch for gauzing welding work composed of a main body and a movable main body for picking up a carbon electrode rod and a cable for supplying electric power and compressed air, The structure of the joint pipe for introducing the electric power and the compressed air is a means for joining the copper wire to the sheath constituting the cable. The sheathing fixture forms the step and the packing, the copper wire fastener and the wire fastener, And an air pin which operates on an operation switch of the gouging torch is constituted by a first body having an air hole formed in close contact with the operation switch, A second body for opening and closing the air hole in a manner of moving forward and backward, and a second body coupled to the first body and connected to the joint pipe by a spring And the third body.

However, in the prior art, the torch head, which is the main body of the gousing head, which transfers current to the output terminal of the head and collects the components constituting the gouging head, is made of brass having a high specific gravity (specific gravity: 8.4 to 8.54) The weight of the torch head occupies about 60% of the total weight of the torch. The weight of the torch, including the torch head, is raised with one hand and the air is ejected at a high pressure to blow the molten metal AIR) and the work to be done over a long period of time, the worker's wrist fatigue can result in a very fast rise.

In addition, since brass has a high electrical resistivity in the flow of current, heat is generated rapidly, which hinders continuous gouging cutting operation and causes damage to the gouging head due to high temperature.

Another problem of the conventional gouging torch head is that a thick cable is used because the high amperes have to be sent to the gouging torch head. In this case, It has a fastening structure.

With this structure, the gouging head is fixed to the end of the cable, so that the gouging head and the cable can not move. The existing heavier gouging torch head is equipped with heavier and thicker cables, which is quite inconvenient for gouging cuts and leads to massive fatigue rises.

Document 1: Korean Patent Application Publication No. 10-2011-0136445

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide an air gouging torch in which the torch head is made of an aluminum alloy to reduce the weight of the torch.

Another object of the present invention is to provide a torch head and a cable rotatably connected to a cable by fastening a coupler between a torch head and a cable so as to prevent twisting of a cable during a work process so that a worker's wrist is not clogged To provide an air gouging torch.

According to another aspect of the present invention, there is provided a torch head comprising: a torch head; a lever pivotally mounted on the hinge in a state of being hinged to an upper surface of the torch head; and a lever provided between the torch head and the lever, And a cable for supplying current and air to the torch head of the torch portion, wherein the torch head is formed by drawing using aluminum.

And a coupler that rotatably connects the torch head to the cable is fastened to the rear of the torch head.

The coupler includes a first coupler body having a through hole formed therein and having an outer circumferential surface at a distal end thereof with a male screw thread threadably engaged with a female thread formed on an inner circumferential surface of the end fastening hole of the torch head, A second coupler body having a tubular body extending to be inserted into the hole and threadedly coupled to an end of the second coupler body, a second coupler body rotatably fitted on the tube body of the second coupler body, And a connecting hole formed in the female thread to be screwed on the formed female thread to rotatably connect the first coupler body to the second coupler body.

The present invention can reduce the weight of the torch by making the torch head made of an aluminum alloy, so that the worker's wrist is not burdened with the work for a long time, and the workability is improved. It also has the effect of reducing the heat generation through the low electrical resistance of aluminum and cooling it rapidly even if heat is generated.

In addition, the present invention provides a synergistic effect of preventing the cable twisting phenomenon in the course of work by performing a coupling operation of a coupler between the torch head and the cable so that the torch head is rotatably connected to the cable. I have.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a three-dimensional view of the construction of an air gouging torch according to a preferred embodiment of the present invention.
Fig. 2 is a sectional view of Fig. 1; Fig.
3 is an exploded cross-sectional view showing in detail an excerpt of the coupler shown in Fig.
Fig. 4 is an assembled sectional view of Fig. 3; Fig.
Fig. 5 is a use state of an air gouging torch according to the present invention. Fig.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following detailed description, exemplary embodiments of the present invention will be described in order to accomplish the above-mentioned technical problems. And other embodiments which may be presented by the present invention are replaced by descriptions in the constitution of the present invention.

The air gouging torch disclosed in the present invention is a torch head for transferring a current to an output end of a head and for collecting components constituting a gouging head. The torch head is made of an aluminum or aluminum alloy having a low specific gravity, By reducing the total weight of the torch, the worker's wrists do not come to the worker for a long time, which is effective in preventing musculoskeletal diseases. Also, since the inherent electric resistance is small, the heat generation is reduced and the heat is rapidly cooled even when heat is generated.

In addition, since the cable for transmitting electric current to the torch head is rotatably connected to the torch head by using the coupler of the present invention, the cable does not rotate according to the movement of the wrist of the worker and the torch head and lever- By configuring to rotate, the operator can move away from the weight due to the weight of the cable and can perform the gouging cutting operation more comfortably. In addition, it can realize the air gouging torch which can improve the workability by reducing the fatigue transmitted to the wrist for a long time. I want to.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of an air gouging torch according to a preferred embodiment of the present invention; FIG.

As shown in FIGS. 1 and 2, the air gouging torch 100 of the present invention includes a torch head 20 having an air valve therein and an air injection hole and an electrode at its tip, A lever 24 which rotates about the hinge 22 in a state where the hinge 22 is coupled to the upper surface of the lever 20 and a lever 24 which is provided between the torch head 20 and the lever 24, And a spring 26 that elastically supports the rotation of the torch head 10 and a cable 26 that is installed behind the torch head 20 of the torch portion 10 with the coupler 40 interposed therebetween, (30), and a cover (70) for covering the torch head (10), the coupler and the cable.

In the present invention, when the torch head 20 is molded, it is preferable that the valve hole is formed so as to be firstly drawn by using aluminum, and then an air valve is inserted into the internal space of the molded body. This is because the low specific gravity of aluminum and the low electrical resistance are used to prevent the worker's wrist from being overloaded for a long time by the light weight of the torch head 20, In order to allow rapid cooling even when heat is generated, the specific gravity and inherent electric resistance between aluminum and other materials will be easily understood from the following table.

Metals and money Specific gravity g / ㎠ Average thermal expansion coefficient Inherent electrical resistance aluminum 2.71 23.5 2.9 Copper 8.96 16.7 1.67 Brass 8.54 19 6

As can be seen in Table 1 above, copper is the standard metal for the electric current, and because the processability is not good and the material cost is high, the material of the torch head

Do not use.

Aluminum is about three times lighter than brass, has low specific resistance and low heat generation, and quickly dissipates heat.

A large intrinsic electrical resistance value means that there is a great deal of force that prevents the electricity from flowing smoothly when the electricity flows. Numerically, the brass has a force that interferes with about two times as much electricity flow as aluminum. Heat is generated faster than aluminum.

On the other hand, the thermal expansion coefficient of aluminum is larger than that of brass. This indicates that the volume of the metal increases when heat is generated in the metal. The brass does not affect the dimension of the space where the air valve is inserted in the torch head even if the heat is generated. However, due to thermal expansion, There is a problem in that a change is caused to affect it.

In order to solve this problem, the inner diameter of the space in which the air valve is inserted is made larger than the outer diameter error range of the air valve, and the protruding length of the piston located on the inner side of the torch head is compensated by increasing the dimension of the space where the air valve is inserted It does not affect the amount of air supplied at high speed, and the operation of the air valve can be smoothly performed.

That is, even if the torch head 20 is formed by drawing with the aluminum material, the torch head 20 can be manufactured even though the thermal expansion coefficient is higher than that of the brass, The light weight of the torch head can be realized, and furthermore, the heat generation due to the low electrical resistance of aluminum can be reduced, and the cooling can be rapidly performed even if heat is generated.

Table 2 below compares the heat generation of a torch head made of brass and a torch head made of aluminum.

time Brass torch head Aluminum Torch Head 0 27 27 5 48 41 10 62 53 15 75 63 20 85 70 25 90 76 30 93 79

On the other hand, the coupler 40 is means for rotatably connecting the torch head 20 to the cable 30.

FIG. 3 is an exploded cross-sectional view showing a section of the coupler 40 in more detail, and FIG. 4 is an assembled cross-sectional view of FIG.

3 and 4, the coupler 40 is connected to the first and second coupler bodies 42 and 50 and the first and second coupler bodies 42 and 50 so as to be rotatable relative to each other And a connecting port 56 for connecting the first and second connectors.

The first coupler body 42 is threadedly coupled to the torch head 20 and has a cylindrical shape and a hole 44 for supplying air to the torch head 20 is formed in the inside of the first coupler body 42, A male screw thread 46 is formed. The male thread 46 of the first coupler body 42 is screwed into the female thread 29 formed on the inner circumferential surface of the fastening hole 28 formed at the end of the torch head 20, So that the body 42 is fastened to the torch head 20.

The second coupler body 50 is connected to the cable 30 and has a cylindrical shape. The second coupler body 50 has a cylindrical shape and has an inner portion for passing the air discharged from the cable 30 to the hole 44 of the first coupler body 42 A hole 51 is formed and a tubular body 52 for insertion into the hole 44 of the first coupler body 42 is extended and the cable 30 is screwed into the end thereof.

The connector 56 is a means for rotatably connecting the second coupler body 50 fastened to the cable 30 to the first coupler body 42 fastened to the torch head 20.

The connector 56 is formed in the form of a cylindrical pipe and has a hole 58 through which the tube 52 of the second coupler body 50 passes. And the step portion 62 is engaged with the stopper 54 formed on the circumferential surface of the tubular body 52 so that the connecting hole 56 is not separated from the second coupler body 50 do.

The male thread 60 is formed on the outer circumferential surface of the connecting hole 56. The male thread 60 is screwed to the female thread 48 formed on the inner peripheral surface of the end of the hole 44 of the first coupler body 42, And the connecting port 56 is fixedly coupled to the first coupler body 42.

The connector 56 is screwed into the first coupler body 42 while being fitted to the outer diameter of the tube 52 of the second coupler body 50 so that the first coupler body 42 is rotated At the same time, the second coupler body (50) is rotated by the outer diameter of the tube body (52) so that the rotational force of the first coupler body (42) is not transmitted to the second coupler body (50).

It is more preferable that a ball bearing 60 is inserted between the hole 58 of the connector 56 and the tube 52 to facilitate the rotation of the connector 56.

The cable 30 can be rotatably connected to the torch head 20 through the coupler 40 having the structure described above. Thus, the present invention can perform the gouging cutting operation while holding the torch head 20 The cable 30 is fixed and does not rotate according to the movement of the wrist of the operator so that only the torch head 20 and the lever 24 are rotated around the coupler 30 The operator can perform the gouging cutting operation more comfortably away from the weight due to the weight of the cable 30, and the workability can be improved by reducing the fatigue transmitted to the wrist for a long time work.

Table 3 below compares the wrist fatigue experienced by the operator when using the torch head 10 made of brass and the torch head 20 made of aluminum.

worker Brass torch head Aluminum Torch Head A 8 3 B 7 3 C 8 3 D 8 3 E 8 3 F 7 2 G 8 3

10: Torch portion 20: Torch head
22: Hinge 24: Lever
30: cable 40: coupler
42: first coupler body 44: hole
50: second coupler body 52: tubular body
54: lashing 56: end connection
62: step jaw 66: ball bearing
70: cover

Claims (3)

A torch head 20 and a lever 24 that is rotated about the hinge 22 in a state where the hinge 22 is coupled to the upper surface of the torch head 20, And a cable (30) for supplying current and air to the torch head (20) of the air glowing torch (10)
The torch head 20 is formed by drawing using aluminum;
On the rear side of the torch head 20;
And a male thread 46 is formed on an outer circumferential surface of the distal end of the torch head 20 so as to be threadedly engaged with an female thread 29 formed on the inner circumferential surface of the end fastening hole 28 of the torch head 20. [ 1 coupler body (42);
A second coupler body (50) having a tubular body (52) extended to be inserted into a hole (44) of the first coupler body (42) with a tip end and a cable (30) screwed into the end thereof;
The first coupler body 42 is rotatably fitted to the tubular body 52 of the second coupler body 50 and is screwed to the female thread 48 formed on the inner peripheral surface of the end of the hole 44 of the first coupler body 42 The first coupler body 42 is connected to the second coupler body 50 in a state in which the male coupler body 60 is formed so that the rotational force of the first coupler body 42 is not transmitted to the second coupler body 50. [ (50);
A stepped portion is formed on the inner surface of the hole of the connector, and the stepped portion is caught by a hook formed on the tube-body surface of the second coupler body, and the connector 56 is not separated from the second coupler body 50 ;
Wherein a ball bearing (60) is inserted between the hole (58) of the connector (56) and the tube (52) to facilitate the rotational movement of the connector (56). delete delete

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