JPH11291046A - Fume suction nozzle device for torch in semi-automatic welding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently recover fume near the position developing the fume by providing a clamp body formed of a connecting hole for connecting a suction hose and a fitting part for fitting to the outer peripheral part of a torch nozzle conduit and a suction nozzle, dividing the fitting part into two so as to be attachable/detachable and disposing the suction nozzle on the coaxial line with the torch nozzle. SOLUTION: The connecting hole 13 is connected with a Roots blower type fume recovering machine for sucking the fume developed at the time of executing an arc welding. The clamp body 10 integrals the fitting part 11 for fitting to the conduit 2a and formed so as to divide into two pieces by fastening with bolt 16. In a base 12, the connecting hole 13 for sucking the fume is arranged. The suction nozzle 20 is widened in the tip part 20a and formed as bell type and in the case of fitting to the insert hole 15 of the clamp body 10, this suction nozzle is disposed as coaxial state with the torch nozzle 3. To the torch in a semi-automatic welding machine having no fume recovering function, this device can be post-fixed and the stuck spatter can easily be cleaned and removed by decomposing the suction nozzle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fume suction nozzle device used by attaching to a torch of a semi-automatic welding machine for collecting fume generated during arc welding.

[0002]

2. Description of the Related Art A conventional torch in a semi-automatic or robotic automatic welding machine having a fume recovery function has a structure in which fume generated from a weld is sucked through a small-diameter suction port formed in an outer cylindrical portion thereof. I have. However, regarding a torch of a semi-automatic welding machine without a fume recovery function, there is no fume suction nozzle device that can be easily attached to a conduit for the purpose of fume recovery.

[0003]

In a conventional torch of a semi-automatic or robotic automatic welding machine having a fume recovery function, the enlargement of the fume suction port is naturally limited due to the relationship with the welding work. From that
Fumes may not be collected sufficiently and the fumes may spread to the surroundings. In addition, since the suction port is formed integrally with the torch nozzle, there is a disadvantage that it is not easy to clean and remove spatter adhering to a deep portion of the suction port. Therefore, for a torch of a semi-automatic welding machine without a fume recovery function, development of a compact fume suction nozzle device that can be retrofitted has been desired. In addition, since fumes cause pneumoconiosis, some measures to efficiently recover them from the viewpoint of occupational safety and health have been demanded.

An object of the present invention is to provide a fume suction nozzle device that can be retrofitted to a torch of a semi-automatic welding machine having no fume recovery function and can efficiently recover fumes near a fume generation point. is there.

[0005]

In order to achieve the above object, a fume suction nozzle device for a torch of a semi-automatic welding machine according to the present invention is connected to a Roots blower type fume recovery machine for sucking fume generated during arc welding. A clamp body formed with a connection port for connecting a flexible suction hose, and a mounting portion for mounting a torch nozzle of a torch for a semi-automatic welding machine to an outer peripheral portion of a conduit provided at a distal end portion; A suction nozzle to be attached to the inserted insertion port, and the clamp body is formed so as to be detachably provided on the conduit by forming a mounting portion in two parts, and the suction nozzle is arranged coaxially with the torch nozzle. It is characterized by having done.

[0006]

The operation of the present invention is described below. The clamp body is attached to the torch nozzle by attaching the two divided attachment portions to the outer periphery of the conduit of the torch nozzle. At this time, the suction nozzle is passed through the torch nozzle and then attached to the insertion port. Thus, the tip of the suction nozzle always moves toward the fume generation location, so that the fume is efficiently collected. In addition, since the suction hose connected to the clamp body has flexibility, the position changes in any direction even when the welding work or welding posture changes,
Easy welding work.

[0007] The fume suction nozzle device for a torch of a semi-automatic welding machine can be easily attached to a torch of a semi-automatic welding machine having no fume collecting function without any modification, and has a fume collecting function. it can. Since the suction nozzle can be easily cleaned and removed by removing the spatter adhered to the inner surface by disassembling the suction nozzle from the clamp body and the torch, it is very easy to use. In addition, since the fume can be always collected near the place where the fume is generated, there is an advantage that the fume collection efficiency is high.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway explanatory view showing a state in which a fume suction nozzle device is attached to a torch of a semi-automatic welding machine.

In FIG. 1, T indicates a known torch for a semi-automatic welding machine. In the figure, 1 is a grip portion, 2 is a conduit extending forward from the grip portion 1, 3 is a torch nozzle connected to the tip of the conduit 2, 4 is a shield gas outlet, and 5 is a welding wire.

The clamp body 10 is provided on the outer periphery 2 of the conduit 2.
The mounting part 11 for mounting to a is formed in two in the horizontal direction, one of which is a base 12, the other is a cover 14,
Both are formed so as to be integrated by tightening them with bolts 16, and are provided detachably on the conduit 2. Base 1
2 is provided with a connection port 13 for connecting to a fume collecting machine that sucks fume generated during arc welding. In addition, the end face 10a of the clamp body 10 has a circular insertion opening 1 when the base 12 and the cover 14 are integrated.
5 is formed.

The suction nozzle 20 has a cylindrical shape with both ends open, and is formed in a trumpet shape with a slightly widened tip portion 20a to facilitate suction of fumes. This suction nozzle 20
Is provided so as to be arranged coaxially with the torch nozzle 3 when it is attached to the insertion opening 15 of the clamp body 10. The clamp body 10 and the suction nozzle 20 constitute a torch fume suction nozzle device N of a semi-automatic welding machine.

A method of attaching the fume suction nozzle device N for a torch to the torch T for a semi-automatic welding machine will be described. The base 12 and the cover 14 of the clamp body 10 are fixed to the outer peripheral portion 2 a of the conduit 2 of the torch nozzle 3 by tightening with bolts 16. At this time, the suction nozzle 20 is passed through the torch nozzle 3 and then the rear end portion 20b of the nozzle 20
To the insertion opening 15 of the clamp body 10. The connection port 13 has a flexible suction hose 8 connected to a suction port of a roots blower type fume collector (not shown).
Connect.

The fume suction nozzle device for a torch of a semi-automatic welding machine having such a structure can be easily attached to a torch of a semi-automatic welding machine without a fume collecting function without any modification, and has a fume collecting function. Can be made. In addition, the suction nozzle is the clamp body,
By disassembling from the torch, the spatter attached to the inner surface can be easily cleaned and removed, so that it is very easy to use.

Next, regarding the fume suction nozzle device N for a torch of the present invention, the distance x (mm) from the opening position of the tip of the suction nozzle 20 to the tip position of the torch nozzle 3;
The graph of FIG. 2 shows the result of an experiment on the relative relationship with the air flow velocity (m / sec) near the fume suction port by changing the amount of air of the fume collector in a stepwise manner.

As a result of the above experiment, it was confirmed that the magnitude of the air velocity near the fume suction port greatly affected the quality of welding and the fume recovery efficiency. For example, when the air flow velocity was 35 (m / sec) and the distance x was 20 (mm), the shielding gas was sucked together with the fume, and a welding defect such as a blow hole was generated in the welded portion. Further, it was confirmed that when the distance x was 70 (mm) or more, the fume collection efficiency was significantly reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a state in which a fume suction nozzle device is attached to a torch of a semi-automatic welding machine, partially cut away.

FIG. 2 is a graph showing a relative relationship between a distance from a tip opening position of a suction nozzle to a tip position of a torch nozzle and an air flow velocity near a fume suction port.

[Explanation of symbols]

N → Fume suction nozzle device for torch T → Torch for semi-automatic welding machine 2 → Conduit 2a → Outer periphery 3 → Torch nozzle 10 → Clamp body 11 → Mounting part 12 → Base 14 → Cover 13 → Connection port 15 → Insertion port 20 → Suction nozzle

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshinobu Ito Kanie-cho, Kaifu-gun, Aichi Prefecture, Kanie-honmachi, Ho-no-ri, 160-1 Anlet Co., Ltd. (72) Inventor, Masami Kato, Kanie-cho, Kaifu-gun, Aichi Prefecture 160-1 Honmachi-no-Honai, Anlet, Inc. (72) Inventor Toshiaki Kato Kanie-cho, Kaifu-gun, Aichi-gun, Kanie-cho, 160-floor, 160th Anlet, Inc. (72) Inventor Koichi Kume, Aichi 160-1, Kanie Honcho, Kanie-cho, Kaifu-gun, Japan 160-in-1 Anlet Co., Ltd. (72) Inventor Takashi Yokoi Takashi Yokoi, Kanie-cho, Kaie-gun, Kaifu-gun, Aichi Prefecture 160-1, 1 in Anlet Co., Ltd. (72) The inventor Haruo Toya Kanie-cho, Kaifu-gun, Aichi Prefecture

Claims (1)

[Claims] 1. A connection port for connecting a flexible suction hose connected to a Roots blower type fume recovery machine for sucking fume generated during arc welding, and a torch nozzle of a torch for a semi-automatic welding machine are provided at the tip. A clamp body formed with an attachment portion for attachment to the outer peripheral portion of the conduit, and a suction nozzle attached to an insertion opening formed in the clamp body, and the clamp body has a mounting portion divided into two parts. A fume suction nozzle device for a torch of a semi-automatic welding machine, wherein the suction nozzle is detachably provided on the conduit and the suction nozzle is arranged coaxially with the torch nozzle.