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Electrical Contacts and Contacts

A technology of electrical contacts and contacts, applied in the directions of contacts, contact materials, circuits, etc., can solve the problems of increasing the number of arcs and the consumption of electrical contact materials, and achieves reduced consumption and cheap opening and closing. Equipment, the effect of shortening the duration of the flutter

Active Publication Date: 2018-07-10
TOKURIKI HONTEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] When this chattering phenomenon occurs, the number of arcs generated between electrical contacts increases, so there is a problem that the consumption of electrical contact materials increases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A silver alloy material having a composition of 91Ag-5.8Sn-3In-0.2Ni in mass % was produced by a dissolution method, and rolling and annealing were repeated to obtain a desired sheet. In addition, in the present invention, as long as it is a silver alloy such as an Ag-Ni alloy or an Ag-W alloy used as an electrical contact material, or an internal oxidation treatment is performed in a post-process to form a silver oxide electrical contact material material, any silver alloy material can be used.

[0044] Form a kind of composite material, and this composite material is to be compounded as the pure silver plate that the thickness of pure silver layer 2 is 3~30% of the total thickness of electric contact on one side of this plate and forms. In addition, in the present invention, when the pure silver layer 2 is less than 3% of the thickness of the electrical contact layer, the bonding strength with the functional layer is not ideal; , the bonding strength was not found to...

Embodiment 2

[0048]In the same way as in Example 1, the contacts ( figure 1 ) (Types of electrical contacts No.6~10). Furthermore, the functional layer has a Vickers hardness of 94 and the base material of the contact has a Vickers hardness of 140.

Embodiment 3

[0050] Using the composite material obtained by the same method as in Example 1, a disc-shaped composite material of 10 mmφ was obtained by press punching.

[0051] The 10mmφ composite material obtained in this way is subjected to barrel polishing and internal oxidation treatment, and the functional layer 3 is made of oxygen-free Cu (Vickers hardness 74) with a thickness of 1 to 50% of the total thickness of the electrical contact. After the plate is bonded to the composite material, it is brazed with a rivet-shaped base material 6 composed of oxygen-free Cu (Vickers hardness 110) to form an electrical contact ( figure 2 ).

[0052] Such an electrical contact 4 is riveted and joined by a rivet-shaped base material 6 to a contact base material 5 made of oxygen-free Cu (Vickers hardness 110) to form a contact ( image 3 ) (Types of electrical contacts No.11~15).

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Abstract

In the prior art, in order to prevent the peeling consumption, there are known methods of preventing the consumption of the contact or base material by using an anti-flashover horn or the like to sense an arc generated when the contact is opened and closed, or by A convex portion of the base material is provided at the end of the contact in the direction of arc driving, so that the electrical contact is not easy to melt. However, these methods are available only when a sufficient space for the arc extinguishing chamber or a sufficient size of the base material can be ensured, and these methods are not necessarily applicable when the equipment is miniaturized. The invention provides an electrical contact and a contact, which are characterized in that copper or copper alloy with excellent electrical conductivity, thermal conductivity and mechanical strength is attached as a functional layer on the pure silver layer on the back of the contact that is easy to peel and consume, Thus, the functional layer has the function of transferring the heat generated when the electrical contact is opened and closed to the base material, the function of shortening the duration of vibration, and the function of preventing peeling consumption by maintaining the bonding strength with the base material, thereby, It is possible to reduce the consumption of the electrical contacts and improve the consumption resistance performance.

Description

technical field [0001] The present invention relates to electrical contacts and contacts that can be used in contact control devices such as circuit breakers or electromagnetic switches. Background technique [0002] For switching equipment such as electromagnetic switches, in order to realize the long life of the equipment, it is the shortest way to improve the consumption resistance of the electrical contact material itself and make it longer. Therefore, it is necessary to improve the electrical contact material itself. Various research and development related to wear resistance performance. [0003] Among them, the method of joining the electrical contact material and the base material of the contact and its joining state are known, especially when the switching frequency is high and the service life is strongly required to be extended, such as electromagnetic switches and relays. Whether it is good or not has a great impact on the life of the electrical contact material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H1/04
CPCH01H11/041H01H1/0231H01H1/02372H01H1/025
Inventor 汲田英生真真田慎也石泽阳介内田有祐
Owner TOKURIKI HONTEN
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