JPS5846511A - Improvement in torch cable for welding - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Welding torch cables are usually made of Cu wire.

This heavy weight forces the operator to exert excessive effort.

The present invention has been made in view of the above circumstances.

In other words, by coating carbon fiber with Ag or Cu, which is lightweight, has high strength, high elasticity, and relatively good electrical conductivity, and using this in a welding torch cable, the weight was reduced. It is something.

The cable accounts for about 65% of the weight of a welding torch used manually, although it varies depending on the model. Therefore,
If this cable is replaced with Ag or CuF plated carbon fiber, the weight can be reduced as follows.

Specific gravity of Ag: Specific gravity of 10.5Cu・
8,9 Specific gravity of carbon fiber: Approximately 1.75 The wire diameter of high-strength carbon fiber is approximately 7P, and the C of the welding torch cable is approximately 1.75.
The wire diameter of u1i used is 200 P or more. Therefore, it is natural that when carbon fiber having a wire diameter of 7 μm is plated with Ag or Cu, the current conduction characteristics are significantly improved.

The thickness of Ag and Cu plating on carbon fibers influences the weight of the cable. Of course, the thinner the material, the lighter it will be, but the harder it will be for current to flow through it. As a result of experiments, it was found that if the film thickness was 1.5P or more, there would be no problem in electrical conductivity.

Next, an explanation will be given with reference to examples.

Example: High-strength carbon fiber bundles of various sizes were mixed with about 1% Ag and Cu.
．． 5- It was plated, attached to the cable of a welding torch, and welded. Ribbons with a small cross-sectional area generated heat, short-circuited, and were impossible to weld, but ribbons with a smaller cross-sectional area were almost the same as when Cu wire was used. Next, the apparent cross-sectional area of the Cu wire and plated carbon fiber used in the torch used in this experiment, the heat generation during welding, and the situation of short circuits are shown.

However, in this experiment, a current of 300 A was applied.

As described above, it has been found that carbon fibers coated with Ag or Cu plating have a small cross-sectional area and are short-circuited or generate heat, but when the cross-sectional area exceeds this value, there is no problem.

That is, with respect to the apparent cross-sectional area of Cu wire of 30-, Ag or C
The apparent cross-sectional area of the carbon fiber used to plate u is 22.6suf.
It was found that welding could be performed with similar efficiency if the

This means that the apparent cross-sectional area of the cable can be reduced by about 25%. Comparing this in terms of weight, it is a reduction of about 50%. That is, since the cable of a welding torch accounts for about 65% of the weight, it has been found that by using the plated carbon fiber cable of the present invention, the weight of the welding torch can be reduced by about 32%.

Claims (1)

[Claims] A welding torch cable characterized in that the welding torch cable is made of Ag or CU-threaded carbon fiber.