JPH10249469A - Metallic wire for manufacturing electric contact - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely detect a connected part in a long wire, and to automatically cut and remove the connected part by making a short connecting wire material different from that of a long wire for electric contact, where the plural long metallic wires are connected with short wires. SOLUTION: Silver-tin oxide-indium oxide alloy of 10kg is made one line of the long wire having 6mm diameter with an extruding machine. The wire- drawing is executed to this wire to finish the one piece of the wire having 1.5mm diameter to make 565.5m length. In order to make the one line of connected wire by connecting three lines of long wires 1, 2, 3, the different kind of metallic short wires having 1.5mm diameter and about 10mm length are in press-contact with each of the end parts of the long wire and all lines are connected and wound around a drum. Then, the length in the one line of the connected metallic wire for electric contact is made to about 1700m. This wire is passed through a feeding mechanism in a contact automatic press-sticking machine and the different kind of metallic short wire as the connecting part 5 of the coppers can surely be detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a metal wire for producing electrical contacts.

[0002] A wire of this kind is wound on a drum in a hoop shape and sent out sequentially.
As described in JP 23964, it is cut into short wires by an automatic crimping machine, crimped to another short wire material, and processed into a bimetal electric contact or the like. This kind of wire is disclosed in
As described in US Pat. No. 6,964,613, it is fed to an automatic welding material, brought onto a contact base, cut and then resistance welded, and then shaped into other shaped contacts.

[0003]

2. Description of the Related Art In this way, since electrical contacts are manufactured from a wire by an automatic machine, the longer the wire, the more continuous the production. Therefore, if the contact wire used is short, the wire has to be replenished to the automatic machine, and the operation of the machine has to be stopped frequently. Productivity will be reduced. In addition, unmanned operation of the machine, especially at night, becomes more difficult.

Normally, the continuous length of the contact wire is determined by the weight of the melting unit lot of the metal material forming the wire and the capacity of the extruder. Because of the special physical properties, the unit lot weight cannot be increased unnecessarily, so that the length cannot be processed to continue indefinitely.

Therefore, as shown in FIG. 1, it has been considered that the ends of wires 1 and 2 which are as long as possible are welded and connected to be used as a longer material. Since the metal structure is not suitable as a contact material, this portion must be removed when the wire is processed into a contact. Therefore, a sensor is incorporated in the feed mechanism of the automatic machine, and this sensor detects the welded part and cuts it.
Elimination has been attempted. However, since the wire diameter of the welded portion is the same as other portions, detection is uncertain with a physical sensor, and since the welded portion is made of the same metal as the other portion, an optical sensor is used. Also made it difficult to detect.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides an electric contact which can reliably detect a connecting portion even if a longer wire is formed by connecting a plurality of long metal wires for electric contact. It proposes a metal wire for manufacturing.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a plurality of long metal wires are connected by a short wire to provide a longer wire for an electrical contact, and the metal of the short wire is a metal of a long metal wire. The object of the present invention is to solve the above-mentioned problem by providing a metal wire for manufacturing an electrical contact different from the above.

That is, unlike the metal (eg, silver or silver alloy) of a long metal wire connected to a short wire metal (eg, copper or copper alloy) for connection, the physical properties of both are different, so that it is easy and easy to use. The joint can be reliably detected and removed from the wire.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A 10 Kg silver-tin oxide-indium oxide alloy was extruded into a continuous long wire having a diameter of 6 mm. This is drawn and the diameter is 1.5
It was finished into one continuous wire rod of φmm. The length of one of the drawn wires was 565.5 m. Three of the wires thus obtained (reference numerals 1, 2, and
In order to make 3) one continuous wire, a short copper wire (reference numeral 5 in FIG. 2) having a diameter of 1.5 mm and a length of about 10 mm is pressure-bonded to each end, and all are connected. Rolled up on a drum. The length of the single continuous metal wire for manufacturing electrical contacts was about 1700 m.

[0010] When the wire was sequentially passed through a feed mechanism of an automatic contact crimping machine and exposed to a color / gloss discriminating sensor incorporated in the feed mechanism, the copper connection portion 5 could be reliably detected. .

[0011]

As described above, according to the present invention, the connecting portion of the long wire can be reliably detected, and this portion can be cut and removed automatically to continuously operate the automatic machine for manufacturing contacts. It has a remarkable effect.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a conventional metal wire for manufacturing an electrical contact in which a long metal wire is connected by welding.

FIG. 2 is an explanatory view showing a metal wire for manufacturing an electrical contact according to the present invention in which a long metal wire is connected with a short wire of a different kind of metal.

[Explanation of symbols]

 1-Long wire rod 2-Long wire rod 3-Long wire rod 4-Welded part 5-Short wire of dissimilar metal

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] April 30, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002] A wire of this type is wound around a drum in a hoop shape, and is sequentially sent out.
As described in JP-A-239964, it is cut into short wires by an automatic crimping machine, crimped to another short wire material, and processed into a bimetal electric contact or the like. Further, this kind of wire is sent to an automatic welding machine to be brought on a contact base metal and cut as described in JP-A-56-96413, and the base metal is subjected to resistance welding. And then molded into another form of contact.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

Namely, the short line forming the for connecting metal (e.g., copper or copper alloy) metal of the metal wire elongated tethered (e.g., silver or a silver alloy) unlike, since both properties are different, easily In addition, the joint can be reliably detected and removed from the wire.

Claims (2)

[Claims] 1. A metal wire for producing an electrical contact which is made longer by connecting a plurality of long metal wires with a short wire, wherein the metal of the short wire is different from the metal of the above-mentioned long metal wire. Metal wire for contact manufacturing. 2. The metal wire according to claim 1, wherein said long metal wire is silver or a silver alloy, and said short wire is copper or a copper alloy. Metal wire.