JPH05138357A - Weld fume suction torch - Google Patents

Abstract

PURPOSE:To provide the weld fume suction torch capable of using a light hose having satisfactory flexibility as a cable hose and improving workability of welding work. CONSTITUTION:A shielding gas discharge nozzle 1 to discharge shielding gas and a suction nozzle arranged coaxially on this shielding gas discharge nozzle 1 are provided on the torch tip. A suction hole part of this motion nozzle is formed of a porous ceramics member having large holes through which weld fumes can pass but spatters cannot pass and this action hole part is formed into a spatter removing member 2. Accordingly, the spatters at the high temperature can be prevented from entering the cable hose.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding fume suction torch in which a shield gas discharge nozzle for discharging a shield gas and a suction nozzle for sucking a welding fume generated during welding are coaxially provided at the tip of the torch. Regarding

[0002]

2. Description of the Related Art When performing welding work in factories and business establishments, it is necessary to remove welding fumes generated by the welding work from the work environment to maintain the work environment in a good condition. As a method of removing welding fume,
For example, welding work is performed at the place where the exhaust system is installed,
It is conceivable to discharge the welding fumes together with air to the outside by the exhaust device. However, this method has the drawbacks that the equipment cost is high and the welding place is limited.

In order to eliminate this drawback, a welding torch has been proposed in which a lightweight hood is attached to the torch while maintaining a sufficient intake efficiency by having a predetermined shape (Japanese Patent Publication No. 51-20305). In addition, a welding fume dust collector that has a sensor and whose hood automatically moves according to the progress of welding work has been proposed (Japanese Patent Publication No. 60-78198).

However, when the hood is attached to the welding torch, the weight reduction of the hood is limited, so that the welding torch becomes heavy and the workability is deteriorated. In addition, the welding fume dust collecting apparatus in which the hood automatically moves has the drawbacks that the apparatus becomes bulky and the working place is limited.

As a solution to these drawbacks, a welding fume suction torch has been proposed in which a suction nozzle for sucking welding fume is coaxially provided at the tip of the torch outside the shield gas discharge nozzle for discharging the shield gas. Is actually used.

FIG. 3 is a plan view showing an example of this kind of welding fume suction torch. A shield gas discharge nozzle 11 for discharging shield gas is arranged at the tip of the torch. In the vicinity of the rear of the shield gas discharge nozzle 11, a hole 12a for sucking the welding fumes is provided around the nozzle.
The suction nozzle 12 provided with is disposed coaxially with the gas discharge nozzle 11. The shield gas discharge nozzle 11 and the suction nozzle 12 are supported by an elbow 13, and the elbow 13 is supported by a grip portion 14. The grip portion 14 has a suction force adjusting hole 14
a is provided, and the amount of gas sucked from the suction nozzle 12 can be adjusted by adjusting the opening area of the hole 14a.

The grip portion 14 and the cable hose 16
A vent mechanism 15 for facilitating bending of the torch is provided between and. And the cable hose 16
An adapter connection portion 17 is provided at the rear end portion. The adapter connection part 17 is provided with a hose connection port 17a, and a fume collection part (not shown) is provided through the hose.
It is designed to connect to.

An adapter 18 is connected to the adapter connecting portion 17. The adapter 18 is provided with a shield gas supply port 18a and an electric cable connector 18b. Shield gas and welding power are supplied via this adapter 18.

The cable hose 16 is, for example, a double pipe as shown in FIG. That is, the inner tube is composed of the power cable 22 and the rubber coating material 21. A liner 20 (for example, a spring liner or the like) is arranged in the inner pipe, and the welding wire passes through the liner 20. A shield gas flows between the liner 20 and the power cable 22. Also, the rubber coating material 2
The gas sucked from the suction nozzle 12 flows between 1 and the outer pipe 23.

FIG. 5 is a schematic view showing the tip of the torch.
The weld gas is shielded from the air by the shield gas A discharged from the shield gas discharge nozzle 11 at the tip of the torch,
Prevents oxidation of weld metal. On the other hand, the gas outside the shield region near the welded portion is not covered by the holes 12 provided in the suction nozzle 12.
It is sucked from a. The gas sucked from the suction nozzle 12 contains welding fumes generated by welding. The gas containing the welding fume passes between the rubber coating material 21 of the cable hose 16 and the outer pipe 23, and enters the fume collection section via the hose connected to the hose connection port 17a of the adapter connection section 17.

FIG. 6 is a schematic view showing an example of a fume recovery unit of a conventional welding device. The fume collecting unit 31 is provided with a fume removal filter 32 for capturing welding fume, a fan 33 for generating a suction force, and a motor 34 for rotating the fan 33. When the gas sucked from the suction nozzle 12 passes through the fume removal filter 32, the welding fume is removed.

It has also been proposed to separate the welding fume recovery hose from the shield gas supply hose at the tip of the torch to lower the temperature of the portion holding the torch (Japanese Patent Publication No. 52-38498). 52-45656
issue). However, if you do so, you will have two hoses,
This leads to reduced workability. Therefore, as described above, the double pipe is often used as the cable hose.

[0013]

However, the conventional welding fume suction torch has the following problems.
That is, during welding, spatter is generated outside the welding fumes, and part of this spatter is sucked from the suction nozzle. In this case, the spatter is heated to a high temperature due to the heat during welding, and since the spatter is relatively large and difficult to cool, the wall surface of the cable hose is heated to a high temperature when passing through the cable hose. Therefore, a cable hose that withstands this high temperature is used. However, in general, a hose having high heat resistance has a large wall thickness, is heavy, and has poor bendability. That is, in the conventional welding device, the cable hose is heavy and the bendability is not good, so that there is a problem that workability is poor.

The present invention has been made in view of the above problems, and can suppress the heating of the wall surface of the cable hose, and it is possible to use a cable hose which is lightweight and excellent in flexibility. It aims at providing a welding fume suction torch which can improve workability.

[0015]

A welding fume suction torch according to the first invention of the present application is provided with a shield gas discharge nozzle for discharging a shield gas and a suction nozzle for sucking a gas containing welding fumes generated by welding. In the welding fume suction torch, the suction nozzle has a suction hole portion formed of a porous member having a hole having a size through which the welding fume passes.

The welding fume suction torch according to the second invention of the present application is a welding fume having a shield gas discharge nozzle for discharging a shield gas and a suction nozzle for sucking a gas containing welding fumes generated by welding at the tip thereof. In the suction torch, the suction nozzle is characterized in that a porous member having a hole of a size through which the welding fume passes is arranged in a gas passage downstream of the suction hole.

[0017]

In the present invention, the suction hole portion of the suction nozzle is formed of a porous member having a hole of a size through which the welding fume passes, or is welded to the gas passage downstream of the suction hole of the suction nozzle. A porous member having a size of a hole through which the fume passes is arranged. Since spatter is larger than welding fumes, it cannot pass through the pores of these porous members. On the other hand, welding fumes and gas having a diameter smaller than that of spatters pass through these porous members and enter the fume collection section via a cable hose or the like. Therefore, according to the present invention, it is possible to reduce the temperature rise of the cable hose and use a cable hose that is lightweight and has excellent flexibility even though it has lower heat resistance than the conventional one. It will be possible. This improves the workability of welding work.

[0018]

Embodiments of the present invention will now be described with reference to the accompanying drawings.

FIG. 1 is a sectional view showing the tip of a welding fume suction torch according to the first embodiment of the present invention.

The present embodiment is different from the conventional one in that the suction hole portion of the suction nozzle at the tip of the torch is formed of a porous ceramic member, and other configurations are basically the same as the conventional one.

That is, in this embodiment, a suction nozzle is provided at the tip of the elbow 3 coaxially with the shield gas discharge nozzle 1. Then, as the suction hole portion of this suction nozzle, the spatter removing member 2 formed of a porous ceramic member is provided. The diameter of the pores of the porous ceramic member constituting the spatter removing member 2 passes through the welding fume (particle size is about 0.05 to 0.3 μm), but spatter having a larger particle size than the welding fume cannot pass through. It is set.

In this embodiment, since the spatter removing member 2 made of porous ceramics is provided as the suction hole portion of the suction nozzle, large spatters cannot pass through the spatter removing member 2. Therefore, hot spatter can be prevented from entering the cable hose. On the other hand, the welding fume and gas enter the suction nozzle from around the spatter removing member 2 as indicated by the arrow in the figure. Therefore, in this embodiment, since the high temperature spatter can be prevented from entering the cable hose, the heat resistance of the cable hose may be lower than the conventional one. For example, the cable hose can be made thin and can be made of a material that is lightweight and has excellent flexibility.
As a result, the weight and bendability of the cable hose can be reduced, and the workability during welding work can be improved. Further, in this embodiment, since spatter does not enter the welding fume collecting section, there is an effect of reducing clogging of the filter of the welding fume collecting section.

FIG. 2 is a sectional view showing the tip of the welding fume suction torch according to the second embodiment of the present invention.

The difference of this embodiment from the conventional one is that the spatter removing member 4 made of porous ceramics is arranged in the gas passage inside the suction nozzle at the tip of the torch. Is the same as the conventional one.

In the present invention, the suction nozzle 2a is made of metal, and the peripheral surface thereof has a suction hole for sucking gas, as in the conventional case. The spatter removing member 4 made of porous ceramics is disposed in the gas passage on the downstream side of the suction hole of the suction nozzle 2a. The pore diameter of the porous ceramic member forming the spatter removing member 4 is set to a size that allows welding fumes to pass but does not allow spatter to pass.

The welding fumes and gas sucked from the nozzle holes of the suction nozzle 2a pass through the spatter removing member 4 and are sent to the welding fume collecting section via a cable hose or the like. On the other hand, spatter is the spatter removing member 4
Cannot pass through and cannot enter the cable hose. Therefore, also in this embodiment, the same effect as that of the first embodiment can be obtained.

[0027]

As described above, according to the present invention, the suction nozzle has a suction hole portion formed of a porous member, or a porous member is provided in the gas passage downstream of the suction hole of the suction nozzle. Since it is provided, it is possible to prevent high-temperature spatter from entering the cable hose, and reduce the temperature rise of the cable hose. Therefore, it is possible to use a cable hose that is thin and lightweight and has excellent flexibility, and it is possible to improve the workability of welding work.

[Brief description of drawings]

FIG. 1 is a sectional view showing a tip portion of a welding fume suction torch according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a tip portion of a welding fume suction torch according to a second embodiment of the present invention.

FIG. 3 is a plan view showing an example of a conventional welding fume suction torch.

FIG. 4 is a cross-sectional view showing a cable hose.

FIG. 5 is a schematic view showing a tip portion of a conventional welding fume suction torch.

FIG. 6 is a schematic diagram showing an example of a fume recovery unit of the welding device.

[Explanation of symbols]

 1, 11; Shield gas discharge nozzle 2, 4; Spatter removing member 2a, 12; Suction nozzle 3, 13; Elbow 14; Grip part 16; Cable hose 31; Fume recovery part

Front Page Continuation (72) Inventor Susumu Imaoka 100-1 Urakawachi, Miyamae, Fujisawa-shi, Kanagawa Incorporated Company Kobe Steel Works, Fujisawa Works

Claims (2)

[Claims] 1. A welding fume suction torch provided with a shield gas discharge nozzle for discharging a shield gas and a suction nozzle for sucking gas containing welding fumes generated by welding, wherein the suction nozzle has a suction hole portion for welding. A welding fume suction torch, which is formed of a porous member having a hole having a size through which the fume passes. 2. A welding fume suction torch having a shield gas discharge nozzle for discharging a shield gas and a suction nozzle for sucking gas containing welding fumes generated by welding at the tip thereof, wherein the suction nozzle is a suction hole. A welding fume suction torch, characterized in that a porous member having a hole having a size through which the welding fume passes is arranged in the gas passage on the downstream side.