Copper supporting piece, preparation method thereof and electrical assembly

A support, pure copper technology, applied in the direction of electrical components, circuits, electric switches, etc., can solve the problems of reducing the service life of electrical appliances, affecting the service life of electric arcs, preventing virtual welding or over welding, and improving melting inconsistencies , Excellent electrical performance

Pending Publication Date: 2022-08-05
温州宏丰特种材料有限公司
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Problems solved by technology

[0005] For example: the Chinese patent with the publication number CN105161380A discloses a circuit breaker electrical contact support and its preparation method, using Cu / Fe / Cu composite material with inlaid copper blocks to replace traditional products, but the support material contains magnetic Elemental Fe is exposed to the air, which brings the risk of affecting the direction of arc and the service life of electrical appliances
[0006] The Chinese patent with the publication number CN102126112A discloses a method for preparing an electromagnetic shielding multilayer composite material in an electric vacuum device, using Cu / Fe / Cu rolled with large deformation, but the composite material Fe of this method is also exposed to the air , especially in humid environments, significantly reduce the service life of electrical appliances

Method used

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  • Copper supporting piece, preparation method thereof and electrical assembly
  • Copper supporting piece, preparation method thereof and electrical assembly
  • Copper supporting piece, preparation method thereof and electrical assembly

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preparation example Construction

[0048] In some preferred embodiments, in the above method for preparing a copper support, after punching the heat-treated layered composite tape, the method may further include: punching the first metal layer, and forming a through hole in the first metal layer The layered composite material has through-holes in the thickness direction for exhaust and slag removal in the welding center area. Further, a concave guide groove can be processed on the outer surface of the second metal layer near the through hole, so as to guide the excess solder at the welding surface to the two ends of the copper support.

[0049] In some preferred embodiments, in the preparation method of the copper support, the obtained layered composite tape is heat-treated, wherein the temperature is 300°C to 800°C, the time is 2 hours to 6 hours, and the atmosphere is H 2 , N 2 or ammonia decomposition atmosphere.

[0050] Based on the structural features of the copper support in the above embodiment, in an...

Embodiment 1

[0053] refer to figure 2 , image 3 As shown, it is a schematic diagram of the structure of the electrical component, which includes: an electrical contact 1 and a copper support, wherein the electrical contact 1 is made of AgSnO2 material; the copper support is such as figure 1 As shown, it includes a first metal layer, an intermediate metal layer and a second metal layer. In this embodiment, the first metal layer and the second metal layer are all made of pure copper, and the intermediate metal layer is pure iron, that is, the copper support is made of Cu / Fe / Cu layered composite tape.

[0054] The preparation method of the electrical component includes the following steps:

[0055] S1: Stack pure Cu strips, pure Fe strips, and pure Cu strips in sequence, and perform asymmetric cold rolling to obtain Cu / Fe / Cu strips. In the Cu / Fe / Cu strips, the intermediate layer is an intermediate metal. The thickness of one outer Cu layer is 80% of the whole strip, and the thickness of...

Embodiment 2

[0060] refer to Figure 4 , Figure 5 As shown, it is a schematic diagram of the structure of the electrical component, which includes an electrical contact 1 and a copper support, wherein the electrical contact 1 is made of AgNi10 material; the copper piece 2 is made of Cu / Fe / Cu layered composite tape material, the first The metal layer adopts red copper strip, the middle metal layer adopts low carbon steel strip, and the second metal layer adopts Cu / H65 composite copper material.

[0061] In this embodiment, the preparation method of the electrical component includes the following steps:

[0062] S100: Stack the red copper strip, the low-carbon steel strip, and the Cu / H65 composite copper material in sequence, perform asymmetric cold-rolling and compounding to obtain a layered composite strip, and heat treatment again. In the layered composite strip, the middle metal layer is low carbon steel, the thickness of one outer copper strip is 30% of the whole strip, and the thick...

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Abstract

The invention provides a copper supporting piece and a preparation method thereof and an electrical component, the copper supporting piece comprises a first metal layer, a second metal layer and a middle metal layer, the first metal layer and the second metal layer are made of pure copper, copper alloy or composite copper, the middle metal layer is made of iron or low-carbon steel, and the three layers are compounded into a whole to form a layered composite material strip. The thickness of the first metal layer is larger than that of the second metal layer, and the first metal layer wraps the side edge of the layered composite material belt, so that the middle metal layer is not exposed in the air; the first metal layer serves as a welding surface, the middle metal layer serves as a non-welding surface, and the welding surface is provided with a through hole penetrating through the thickness direction of the layered composite material belt. According to the invention, the problems of mechanism clamping, easy tilting of an arc striking angle, welding creeping points and poor deslagging and exhausting caused by rusting of the electrical component are effectively solved, so that the temperature rise of an electrical product is reduced, the electrical life of the electrical product is prolonged, the welding process is shortened, the quality of the electrical component is greatly improved, the use amount of high-valence copper is reduced, and the method is suitable for batch production.

Description

technical field [0001] The invention relates to the field of electrical devices, in particular, to a copper support, a preparation method thereof, and an electrical assembly. Background technique [0002] Circuit breakers, relays, contactors, control switches and other low-voltage electrical contact assemblies and their supports play the role of transmitting current to form a loop during operation, and their quality directly affects the reliability and stability of circuit breakers, relays and other electrical appliances sex. [0003] For low-voltage electrical appliances such as circuit breakers, relays, and contactors, especially low-voltage electrical appliances with high current levels, copper-clad steel is mostly used for electrical contact supports. Copper-clad steel has high strength, high plasticity and good electrical conductivity, but the magnetic element Fe in the middle layer is exposed in the air, which is prone to rust. , causing the internal mechanism to get...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/025H01H11/04
CPCH01H1/025H01H11/04
Inventor 陈家帆王蕾穆成法张林吕鹏举秦川
Owner 温州宏丰特种材料有限公司
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