JPS5844920Y2 - TIG training torch - Google Patents

Description

[Detailed description of the invention] This invention relates to a torch for TIG welding (non-consumable electrode inert gas arc welding), which is particularly suitable for automatic welding of workpieces of different diameters in narrow circular areas. It's about torches.

Conventionally, when automatically welding workpieces with different diameters when welding a narrow circular area, the tracing mechanism or the like has to be replaced each time so that the trajectory of the torch tip corresponds to the workpiece.

Such conventional means not only require a mechanism such as a cam for each workpiece, but also have the disadvantage that the structure is complicated and the device is expensive.In addition, the replacement work of the copying mechanism etc. is troublesome and complicated. Also, it is disadvantageous in terms of time economy.
It is also disadvantageous in terms of work efficiency and torch availability.

The inventors came up with this idea in order to solve the above-mentioned problems in TIG welding. It is configured to be replaceable and allows automatic welding of workpieces with different diameters simply by rotating the torch around the axis. To provide a TIG welding torch that can automatically weld different types of workpieces, has a simple configuration, and has dramatically improved workability.

A preferred embodiment of this invention will be described below in detail with reference to the accompanying drawings.

Reference numeral 1 denotes a vertically installed torch body, which is formed into a cylindrical shape from an electrically conductive member, and has a gas passage 2 therein in the axial direction.
is formed, and this gas passage 2 is connected to a gas supply pipe 3 at its upper end.

An electrode holder attachment hole 4 is formed in the electrode holder attachment portion 1a at the lower end of the torch body 1, and extends through the electrode holder attachment hole 4 in a direction perpendicular to the axis. The outer periphery of the main body 1 is covered with an insulating material 5 to insulate it from the outside.

Reference numeral 6 denotes an electrode holder, which is also made of a conductive material like the main body 1, and the main body 7 of the electrode holder 6 is formed with an outer diameter that fits tightly into the mounting hole 4, as shown in the figure.
The nozzle 8 is configured to protrude in a direction perpendicular to the axis of the lower end of the main body 1 when the main body 1 is tightly fitted.

A passage 9 connecting to the gas passage 2 is provided in the main body 7 of the electrode holder, and a passage 10 is perpendicular to the passage 9, the base end thereof is connected to the passage 9, and the distal end thereof is open toward the nozzle. The opening 10a in the nozzle direction of this passage 10 has a large diameter, and the opening 10a has a jet hole 11a.
... is closed with a radially formed member 11 to form a nozzle 8.

At the axial center of the electrode holder main body 7 is a rod-shaped electrode 1.
A hole 13 is formed through which the electrode 12 penetrates.
It passes through the opening 10a and a hole 11b provided at the center of the member 11 forming the nozzle, and is inserted so that its tip slightly protrudes toward the tip of the nozzle 8.

The amount of protrusion of the electrode 12 can be adjusted forward or backward by an adjustment screw 14 made of an insulating material and screwed into a screw hole 13a formed at the rear end of the hole 13.

A stop hole 15 is formed on the lower side of the main body 7 of the electrode holder 6 and is perpendicular to and communicates with the mounting hole 13 of the electrode 12. The stop hole 15 is formed at the tip of a set screw 16 screwed into the torch main body 1 from the bottom. The stopper part 16a is fitted into the stopper hole 15, and the electrode holder 6 is fixed to the main body 1 by the stopper part 16a, and the electrode 12 is pressed and fixed by this end.

In the above, the attachment hole 4 is formed in a tapered shape to improve the adhesion with the torch body 1, and therefore the electrode holder body 7 is formed in a tapered shape so that it can be pulled out forward when being replaced.

Torch body 1 of the TIG welding torch configured as above
is rotatably supported by a torch holder 17 and rotated around the axis of the torch body 1 to TIG weld a circular part of the workpiece according to the rotation locus of the tip of the electrode 12.

If the diameter of the circular part of this workpiece is different, if the diameter is small, the amount of protrusion of the electrode 12 can be adjusted with the adjustment screw 14, but if the amount of deformation is a dog. ,
Replace the entire electrode holder 6 with a compatible one.

That is, by removing the set screw 16, the electrode holder 6 can be pulled out to the right in the figure, and after pulling it out, select a suitable one from among the multiple types of electrode holders prepared in advance with different lengths, and then After replacing the electrode holder as described above, rotate the torch body 1 around the torch body 1 in the same manner as described above without moving the rotating shaft, and tighten the tip of the electrode 12. The locus is matched with the different diameter portion of the workpiece, and TIG welding is performed on the circular portion with different diameter.

According to this invention as described above, in TIG welding, electrode holders of multiple lengths and short lengths are provided in advance, and by replacing them, the rotation locus of the electrode can be changed. Even if there are parts with different diameters, by replacing the electrode holder with a suitable one and rotating the torch along the axis in the same way as above, welding can be performed by following the welding surface of the workpiece with different diameters. It is possible to automatically weld circular parts with different diameters without moving the parts.

Therefore, according to this invention, it is possible to weld workpieces having circular parts with different large and small diameters without requiring a rotating shaft copying mechanism or moving mechanism, etc., the structure is simple, and the electrode holder can be replaced. This makes it possible to obtain a low-cost and highly efficient TIG welding torch, which has good workability, as well as allowing workpieces of different diameters to be welded with a type of torch by simply replacing the electrode holder. It can be a simple mechanism without moving the rotating shaft, and has various features such as contributing to extending the life of the torch, and is extremely practical.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIG. 1 is a cutaway side view of the main part of the torch, and FIG. 2 is a sectional view taken along line 2-2 in FIG. 1. In the drawing, 1 is the torch body, 2 is the gas passage, 6 is the electrode holder, 9 and 10 are the gas passages, 8 is the nozzle 12
is an electrode.

Claims (1)

[Scope of utility model registration request] A torch body 1 is provided with a gas passage 2 for connecting a gas supply pipe 3 therein, and is formed into a cylindrical shape made of a conductive member, and the torch body 1 is supported rotatably around an axis. A torch holder 17, a tapered electrode holder attachment hole 4 formed at the end of the torch body 1 so as to be perpendicular to the axis, and each of the electrode holder attachment holes 4 is removably fitted into the attachment hole 4, and the tapered a plurality of electrode holders 6 having tapered outer shapes and different lengths so as to be tightly fitted into the mounting holes 4; a passage 9 formed in the electrode holder 6 and communicating with the gas passage 2; A passage 10 formed in the electrode holder 6 and communicating with the passage 9 and having an open end; a member 11 that closes the opening at the end of the passage 10 and is provided with a gas ejection hole 11a; A rod-shaped electrode 12 protrudes and is inserted into the electrode holder 6 so as to be able to move forward and backward, and the torch body 1
for TIG welding, characterized in that it is screwed onto the end of the torch, a stopper 16a formed at the tip presses and fixes the electrode 12, and a set screw 16 fixes the electrode holder 6 to the torch body 1. torch.