JPS63230274A - Wire torch for semiautomatic hot wire tig welding - Google Patents

Abstract

PURPOSE:To freely regulate a torch tip angle by joing a nozzle rear end part to a torch main body freely turnably and providing the universal joint structure using a conductive material to a part to come into contact with the rear end part to feed a wire stably. CONSTITUTION:A nozzle 30 and the torch 40 are of the universal joint structure and the nozzle 30 can be optionally oscillated on the circumference in the range of an angle theta. The nozzle 30 is positioned at the desired angular position to tighten a nut 41. A contact part between a bent part of the wire 15 and the inner wall surface of a spherical part 31 is a feeding point 16. The electricity is supplied from a power source to a wire guide 43 and the electricity is supplied to the spherical part 31 via the nut 41 or directly and the electricity is supplied to the wire 15 by the feeding point 16. By this method, since the wire 15 is in contact with the feeding point of the nozzle 30 at all times, the stable welding can be performed and the angle of the nozzle 30 can be optionally regulated, so the torch tip angle can be set to the free angle fitted to the working.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a wire torch for semi-automatic hot wire TIG welding, particularly for semi-automatic hot wire TIG welding which is suitable for maintaining a stable arc state and freely welding narrow parts. Regarding wire torches.

[Conventional technology]

FIG. 2 is a configuration diagram showing an example of a semi-automatic hot wire TIG welding device.

The arc power source 1 and the wire heating power source 2 are installed side by side and integrated to form an integrated power source section 8.

A wire feeding device 3 with a wire reel 4 attached thereto is connected to the wire heating power source 2, and an arc torch 5 is connected to the arc power source 1.

Further, a wire torch 6 is connected to the wire feeding device 3, and welding to the base material 7 is performed using the wire torch 6 and the arc torch 5.

When welding using the welding apparatus with the above configuration, for example, as shown in FIG. 3, hold the arc torch 5 in the left hand 9, the wire torch 6 in the right hand 10,
Place each tip at the welding position and weld. The wire torch 6 is made to approach the arc torch 5 from any direction. During welding, an arc flies toward the base material 7 from a tungsten electrode attached to the tip of the arc torch 5, melting the wire, and forming weld metal at the welding position to perform welding. The wire feeding device 3 replenishes the melted wire.
The wire is automatically pulled out from the wire reel 4 and sent to the wire torch 6.

FIG. 4 is a cross-sectional view showing the structure of the tip of the wire torch 6. As shown in FIG.

The wire 15 supplied from the wire feeding device 3 is inserted into the through hole in the bent conductive portion 16 bent at a predetermined angle, and the bent portion contacts the inner wall surface of the bent conductive portion 16 to connect the feeding point 17. Form. A power source of the wire heating power source 2 is connected to the bent conductive portion 16, and a current flows through the wire 15 to the base material 7 and is further returned to the wire heating power source 2.

A tip portion 18 is screwed onto the tip side of the bent conductive portion 16, and the wire 15 is exposed from this tip portion 18. Further, a cylindrical insulating section 19 is connected to the rear end of the bent conductive section 16 . Further, a covering portion 20 made of an insulating material is provided on the entire outer peripheral surface of the curved conductive portion 16 and on the tip portion 18 and the surface of the insulating portion 190 at a predetermined length from the front and rear ends thereof.

The reason why the torch 6 is provided with the bent conductive portion 16 is as follows.
The purpose is to stabilize the arc by keeping the power feeding point to the wire 15 constant.

[Problem that the invention seeks to solve]

However, in conventional welding torches, the bent conductive part is formed by bending a wire passing hole, so the bending process changes the hole diameter, making it difficult for the wire to pass through smoothly. This caused the problem that the arc was not stable due to the occurrence of catching.

Furthermore, since the bending angle of the wire torch is fixed,
When welding in narrow areas, it is not possible to make delicate adjustments to the tip angle of the torch, resulting in problems such as poor work efficiency.

The object of the present invention is to provide a semi-automatic hot wire T-worker G# connection wire/ear torch which is capable of stably contacting the wire to the feeding point and passing the wire through the torch, and which also allows the torch tip angle to be arbitrarily adjusted. For the purpose of providing.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a wire torch that is configured separately from an arc torch and that is equipped with a power feeding point for the wire to be inserted, in which the wire is exposed from the tip and is A nozzle whose rear end is made of a conductive material, and a universal joint structure in which the rear end of the nozzle is rotatably connected to the torch body and a part that contacts the rear end is made of a conductive material. It is set up and configured.

[Effect]

According to the above means, the contact part between the universal joint structure and the wire becomes the power supply part, and the nozzle can be positioned at any angle, so the wire torch can be used without bending after processing the conductive part. can be configured.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a sectional view showing one embodiment of the present invention.

The nozzle 30, which has a through hole in the center for passing the wire 15 through, is constructed using a cylindrical conductive material that exposes the wire 15 from its tip. A spherical portion 31 is formed at the rear end to be movably coupled to the torch body. This spherical part 31 has a diameter larger than the diameter of the body part,
A conical introduction port 32 for introducing the wire 15 is also provided.

The torch body 4° to which the nozzle 30 is rotatably connected is
A nut 41 having a spherical surface portion on the inner surface that fits into the spherical portion 31 of the nozzle 300 is attached to the tip of the main body.

This nut 41 has a cylindrical shape and is screwed onto the tip of the covering portion 42.

A wire guide 43 is fitted into the inner periphery of a portion of the covering portion 42 and the nut 41, and the wire guide 15 is inserted through the center. The tip of the wire guide 43 contacts the wire insertion side end of the spherical portion 31 and supports the nozzle 30 together with the nut 41. The wire guide 43 is made of a conductive material,
A current-carrying electric wire 44 for connecting to the wire heating power source 2 is connected. The insulating part 45 is connected to the wire guide 43.
is fitted inside the covering portion 42.

In the above configuration, when inserting the wire 15 into the torch, first loosen the nut 41 and stand the nozzle 30 upright. In this state, the wire 15 supplied from the wire feeding device 3 is fed into the torch main body 40, passes through the wire guide 430 through hole, and further passes through the inlet 32 of the spherical portion 31.
It is exposed from the tip of the nozzle 30 through the arc, and is thrown into the arc.

Since the nozzle 30 and the torch main body 40 have a universal joint structure, the nozzle 30 can be swung arbitrarily on the circumference within the range of angle θ. Desired angular position f nozzle 30
Tighten the nut 41 while positioning.

When the nozzle 30 is attached at an angle θ, the contact portion between the bent portion of the wire 15 and the inner wall surface of the spherical portion 30 becomes the power feeding point 16 . The wire guide 43 is supplied with power from the wire heating power source 2 via an energized wire 44 .

The power applied to the wire guide 43 is supplied to the spherical portion 32 via the nut 41 or directly. The wire 15 is fed by a feed point 16 . Although the wire 15 is continuously fed out through the inlet 32, the feed point 16 is always at the same position unless the mounting angle of the nozzle 30 is changed.

Therefore, since the wire 15 is always in contact with the power feeding point of the nozzle 30, stable welding is possible, and the nozzle 3
Since the zero angle can be set arbitrarily, the torch tip angle during welding can be set to any angle that suits the work. Furthermore, the wire 15 is always connected to the wire guide 43 and the nozzle 30.
Since the wire passes through the straight wire hole, the problem of getting caught due to changes in the hole diameter is eliminated.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to stably supply power to the wire, and the torch tip angle can be freely adjusted, making it easy to weld into narrow areas.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a torch showing an embodiment of the present invention;
Fig. 2 is a configuration diagram showing a semi-automatic hot wire TIG welding device, Fig. 3 is an explanatory diagram showing the handling of an arc torch and a wire torch in semi-automatic welding, and Fig. 4 is a front cross section showing a conventional hot wire torch. It is a diagram. 3... Wire feeding device, 5... Arc torch, 6... Wire torch, 7...
...Base material, 15...Wire, 16...
Feeding point, 30...Nozzle, 31...Spherical part, 32...Inlet, 40...Torch body, 41...Nut , 42... Covering part, 43... Wire guide, 44...
- Current-carrying wire, 45...Insulated part. Figure 2

Claims (1)

[Claims] (1) A wire torch configured separately from the arc torch and equipped with a power feeding point for the wire to be inserted, in which the wire is exposed from the tip and at least the rear end is made of a conductive material. A semi-automatic hot wire TIG, characterized in that the rear end of the nozzle is rotatably coupled to the torch body, and a universal joint structure using a conductive material is provided in a portion that contacts the rear end. Wire torch for welding.