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Method for manufacturing flake-like arc contact finger

A manufacturing method and sheet-like technology, applied in electrical components, electrical switches, circuits, etc., can solve the problems of easy melting of the solder layer, hidden dangers of accidents, low melting point, etc., and achieve the effects of high mechanical strength, material saving and high strength.

Inactive Publication Date: 2012-11-07
段沛林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silver-copper alloy is a medium-temperature solder with a relatively low melting point. When a high-voltage power switch is exposed to a high temperature instantaneously and generates high temperature, the solder layer is easy to melt and turn around, causing accident hazards.

Method used

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  • Method for manufacturing flake-like arc contact finger
  • Method for manufacturing flake-like arc contact finger
  • Method for manufacturing flake-like arc contact finger

Examples

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Embodiment Construction

[0023] The invention provides a method for manufacturing a sheet arc contact finger. The present invention will be further described below in conjunction with the accompanying drawings. The manufacture of the sheet-shaped arc contact finger adopts two kinds of powder composite pressing, and the whole is carried out at a high temperature above the melting point of copper in an environment where the protective gas is an inert gas (nitrogen or argon) or a reducing gas hydrogen or a mixture thereof. Sintering, plastic deformation through recompression, pressure processing to improve the physical and mechanical properties of copper, and finally plane processing to obtain sheet arc contact fingers;

[0024] figure 1 Shown is a schematic diagram of the structure of the sheet arc finger, where a. the front view of the sheet arc finger; b. the side view of the sheet arc finger. The manufacturing process steps of the flake arc contact finger are as follows:

[0025] (1) Ingredients, ...

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Abstract

The invention discloses a method for manufacturing a flake-like arc contact finger and belongs to the machining technology of high-voltage electric appliance parts. The method for manufacturing the flake-like arc contact finger comprises the following steps of: performing composite pressing on two kinds of powder under the environment of inert gas (nitrogen or argon) or reducing gas (hydrogen) ora mixture of the inert gas and the reducing gas which serves as protective gas; sintering at high temperature of above the melting point of copper, and performing plastic deformation through composite pressing; improving physical and mechanical performances of the copper through pressure machining; and performing planar machining to obtain the flake-like arc contact finger. In the method, copper tail is manufactured by performing mould pressing on copper powder and the appearance of the arc contact finger is guaranteed by a composite pressing mode, so that the utilization ratio of the materials is over 95 percent. Copper tungsten and copper are sintered through a high-temperature liquid phase to obtain a metallurgical composite interface which has the characteristics of high mechanical strength, high flow conductivity, no hidden dangers such as radiation and the like during power on, no turn-about phenomenon and the like. The working strength is guaranteed and the abrasion of contact parts is reduced. The manufactured flake-like arc contact finger saves materials.

Description

technical field [0001] The invention belongs to the technical scope of high-voltage electric parts processing, and in particular relates to a method for manufacturing a sheet arc contact finger. Background technique [0002] Chip contacts are widely used in various medium and high voltage power switches, and are the core components of power equipment. They are divided into conductive contacts and arc contacts according to their uses. The conductive contact finger is generally stamped by copper plate or copper strip; the arc contact finger is used to start the arc when the contact and the contact finger are disconnected. In terms of composition, the arc contact finger is composed of two parts: the arc extinguishing end and the conductive end. The arc-extinguishing end is made of copper-tungsten alloy, and the conductive end is made of copper. The two parts are composited by welding and sintering. [0003] Sheet arc contact fingers are used in various high-voltage electrical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H11/00B22F3/16
Inventor 段沛林陈世俊王星明高振山
Owner 段沛林
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