JPS6019087B2 - Method for manufacturing electrical contact materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an electrical contact material, and more particularly to a method of subjecting a long material to internal oxidation treatment.

A well-known long material to be subjected to internal oxidation treatment is an alloy made of silver with the addition of easily oxidizable elements. A method of winding the material onto a reel and leaving it as it is in the electric furnace, and a method of cutting the long material into strips and placing them on a plate or the like in the electric furnace i or hanging them were investigated. However, in the former method, since the long materials overlap each other, there is a risk that the materials may stick together.

Moreover, if the material is subjected to internal oxidation treatment while being wound on a reel, it will become curved, so it must be straightened into straight lines, but if straightened, uneven distortion will occur in the material. There was a drawback. In addition, the latter method has poor productivity because it cuts a long material into strips, and it also has the disadvantage that if it is placed on a plate or the like in the oven and left side by side, the surface in contact with the plate and its periphery will become dirty. there were.

Furthermore, in both of the above methods, the material is left in a furnace, but since the temperature distribution within the furnace is not uniform, the internal oxidation state of the material becomes non-uniform, resulting in uneven hardness.

An object of the present invention is to provide a method for manufacturing an electrical contact material that can eliminate the above-mentioned drawbacks,
Examples thereof will be described below with reference to the drawings.

In the figure, 1 is a long material, and this longest material 11 is fed out from the feed-out reel 2, passes between a pair of upper and lower material support rollers 4, enters a tubular electric furnace 5, and is moved into the electric furnace 5. While passing through, the material is subjected to internal oxidation treatment, and after exiting the electric furnace 5, it passes between a pair of upper and lower material support rollers 4' and is wound onto the take-up reel 3. In this case, tension is applied to the long material 1 by a delivery reel 2 and a take-up reel 3. Next, a specific example of the manufacturing method according to the present invention will be described.

Ginichi 0. A long (approximately 100 skin) material 1 made of round weight % magnesium - 0.2 weight % nickel with a plate thickness of 0.15 side and medium 10 side is fed by the sending reel 2 and the take-up reel 3 as described above. Material support roller 4 while applying tension
. In this case, the temperature in the tubular electric furnace 5 is 750 oo, the moving speed of the largest material 1 is 10 skins/min, and the tension applied to the largest material 1 is 1.5 k.
9/Fence 2 It was. The long material 1 that has been internally oxidized in this way is wound onto the take-up reel 3, and tension is applied during the internal oxidation treatment, so it does not bend or meander. Therefore, since there is no need to straighten the straight line after the internal oxidation treatment, there is no occurrence of non-uniform distortion due to straightening as in the case of conventional methods.

Furthermore, since the long materials 1 do not overlap during internal oxidation, the materials do not stick together, and since the long materials 1 move at a constant speed in the tubular electric furnace 5, the internal acid oxidation of the longest material 1 is prevented. The Q-deposition becomes uniform, and there is no uneven hardness in the material. Furthermore, since internal oxidation treatment is performed continuously, mass production is also possible. As described in detail above, the method for producing the electrical ant point material of the present invention has many excellent advantages, so that it is possible to easily obtain an electrical contact material that can be used as electrical contacts for various purposes.

Further, in the method for producing a crab contact point material of the present invention, the moving speed of the elongated material and the tension applied to the elongated material can be arbitrarily set depending on the inside of the elongated material, the plate thickness, or the wire diameter.

Therefore, it is possible to prevent excessive or insufficient internal oxidation of the longest material,
Electrical contact materials with the required internal acidity state can be easily obtained.

[Brief explanation of drawings]

The figure is a schematic diagram showing one embodiment of the method for manufacturing an electrical contact material according to the present invention. 1... Spring contact material, 2... Delivery side reel, 3
...Take-up reel, 4, 4'...Material support roller, 5.
...Tubular electric furnace.

Claims (1)

[Claims] 1. A method for producing an electrical contact material, which comprises heating a long material made of a silver alloy while applying tension, and internally oxidizing the long material by moving the material in one direction.