JPS5856065Y2 - MIG welding torch tip - Google Patents

Description

[Detailed description of the invention] This invention relates to a tip structure of a MIG welding (core wire welding) torch.

The structure of a conventional torch tip is, for example, as shown in FIG.
As shown in the figure, it is unraveled from the reel attached to the wire feeding device e, passes through the flexible tube d, reaches the torch f, passes through the main tube a and the small hole of the tip b, and protrudes from the tip tip. It is formed to do so.

Note that g is a metal nozzle for discharging carbon dioxide gas or argon gas.

However, in a torch with such a structure, if an accident occurs in which the wire W is welded to the tip of the tip b during welding work, the work cannot be continued after that, so it is necessary to separate the weld between the wire and the tip. Since this separation is difficult, the tip is generally replaced.

However, even if you try to rotate the chip to remove it from the main pipe, it is difficult to rotate the chip because the wire integrated with the chip is continuously wound around the reel of the wire feeding device as described above. .

Therefore, the wire is cut at the reel portion, but even if the wire is cut, there is still resistance to the rotation of the tip, and replacing the wire requires a lot of man-hours. This was uneconomical because the wires leading to the chip were also discarded.

In view of the above, it is an object of this invention to provide a structure of a torch tip in which the tip can be easily replaced even in the event of the above-mentioned welding accident, and furthermore, only a small length of wire can be discarded. With the goal.

The gist of the structure of this device is that the tip is composed of a first tip that is screwed onto the main tube, a second tip that is screwed onto the tip of the first tip, and a screw on the proximal end of the first tip and a tip that is screwed on the tip of the first tip. The screws of the parts are formed with left and right sides reversed, and by rotating only the first chip in a predetermined direction, the main pipe, the nest 1 chip,
and a second chip that can be disassembled and reassembled.

The structure of this invention will be explained below based on the illustrated embodiment.

In FIG. 1, reference numeral 1 denotes a main pipe, through which a small "JLla" large enough to allow wire W to be fed out passes along the axis, and a right-hand female thread 1b is bored at the tip.

Reference numeral 2 denotes a first chip, through which a small hole 2a having approximately the same diameter as the small hole 1a passes through along its axis, and a screw 1b is attached to the base end of the first chip.
A right-hand male thread 2b is formed to be screwed into the holder, and a left-hand female thread 2C is bored at the tip.

3 is a second chip, and like the first chip 2, a small hole 3a passes through it along the axis.

A left-hand male thread 3b is formed at the base end to be screwed into the female screw 2C, and the distal end is formed in the same shape as the distal end of a normal tip.

When in use, the main pipe 1. 1st chip 2. The second tip 3 is screwed and tightened, and W is inserted into the communicating small holes 1a, 2a, 3a.
is configured so that it passes through.

Next, a description will be given of the operation when the wire W is welded to the tip of the second tip 3 and the tip is replaced.

Remove the removably formed metal nozzle 4, and remove the main pipe 1.
and the second tip 3 are held so as not to rotate, and the first tip 2 is rotated counterclockwise when viewed from the distal end side.

Then, the screwing between the first tip 2 and the main pipe 1 is released, and the screwing between the first tip 2 and the second tip 3 is also released.

In this case, the wire W does not rotate integrally with the second chip 3, and the wire W does not rotate integrally with the second chip 3.
Since only the chip 2 is rotated, it can be easily rotated.

Then, pull the second tip 3 to slightly enlarge the gap between it and the first tip, cut the wire W from the gap, remove the second tip 3 to which the wire piece is welded, and screw the first tip 2 into the main pipe 1. At the same time, insert another second tip 3 into the first tip 2.
Screw it on to complete the tip replacement work.

According to this invention, as described above, the tip consists of a first tip and a second tip, and a screw connecting the first tip and the main pipe and a screw connecting the first tip and the second tip are connected to each other. By reversing the left and right sides, the second chip can be separated by rotating only the first chip, and the wire can be cut just before the welded part, making chip replacement easier, reducing man-hours, and eliminating waste. Not only is the length of the wire used significantly shorter, but the second chip that is discarded is smaller than a normal chip, so it is cheaper and the cost of replacement is significantly reduced.

Furthermore, when the second tip is replaced due to wear over time, the second tip is small in size, so it is cheaper and more economical than a normal tip.

[Brief explanation of the drawing]

FIG. 1 shows a longitudinal section of an embodiment of this invention in an exploded state,
FIG. 2 is a partially sectional front view of the tip of a typical torch, and FIG. 3 is an explanatory diagram showing the torch and related members. 1...Main pipe, 1b...Right female thread, 2...1st tip, 2b...Right male thread, 2C...Left female thread, 3...
・Second tip, 3b...Left male thread.

Claims (1)

[Scope of utility model registration request] The proximal end of the first tip is screwed onto the distal end of the main tube, the proximal end of the second tip is screwed onto the distal end of the first tip, and the screw on the proximal end of the first tip and the distal end are screwed together. The tip of a MIG welding torch is characterized by being formed with the left and right opposite to the screw.