Copper-aluminum composite material, coil assembly of miniature circuit breaker and preparation method thereof

A technology of small circuit breakers and composite materials, which is applied in the manufacture of circuits, electrical components, and emergency protective devices. Light weight, lower overall cost, and improved bonding strength

Active Publication Date: 2020-04-24
WENZHOU HONGFENG ELECTRICAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Copper coils and connection plates are relatively expensive, and small circuit breakers are used in large quantities and updated quickly. A large amount of pure copper materials are used, resulting in great waste; and due to the high density of copper, the product is heavy
At the same time, the red copper heats up when energized, and the surface is easily oxidized and peeled off, which affects product performance.

Method used

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  • Copper-aluminum composite material, coil assembly of miniature circuit breaker and preparation method thereof
  • Copper-aluminum composite material, coil assembly of miniature circuit breaker and preparation method thereof
  • Copper-aluminum composite material, coil assembly of miniature circuit breaker and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The first step is to slot the copper or copper alloy strip

[0060] The parameters are as follows: the number of grooves is 1 or more, the groove width is 2mm-25mm, the depth is 0.2mm-10mm, and the distance between any two grooves is greater than 20mm; the width of copper or copper alloy strips is between 30mm-150mm The thickness is between 1mm and 20mm.

[0061] The second step is to clean the grooved copper or copper alloy strip and aluminum or aluminum alloy strip obtained in the first step

[0062] The parameters used are: aluminum or aluminum alloy material strip width H (size), groove width -0.5mm≤H≤groove width+0.5mm, aluminum or aluminum alloy strip thickness is the same as groove depth; cleaning speed is 0.1m / min~ 10m / min, use one time of cleaning or multiple times of cleaning until the surface of the strip is a new rough surface.

[0063] The third step is to mosaic composite the strip after cleaning

[0064] Wherein: thickness after compounding / thickness b...

Embodiment 2

[0082] Taking the copper-aluminum composite material of the coil and its connecting plate prepared by preparing multiple round aluminum wires as an example

[0083] The first step is to slot the copper strip; among them: the number of slots is 1, the slot width is 25mm, and the slot depth is 2mm; the width of the copper strip is 150mm, the thickness is 20mm, and the slot is located at the center of the copper strip;

[0084] The second step is to clean the grooved copper and aluminum strips obtained in the first step; among them: the aluminum width is 24.5mm, the thickness is 2mm; the cleaning speed is 0.1m / min, and the cleaning time is 1 time. The surface of the belt is a new rough surface;

[0085] The third step is to carry out cold compounding of the tape after cleaning, and the thickness of the tape after compounding is 4mm;

[0086] The fourth step is to carry out continuous annealing of the compound strip, wherein: the effective temperature zone of the annealing furnac...

Embodiment 3

[0095] Take the copper-aluminum composite material for preparing a coil and its connecting plate from a single round wire as an example:

[0096] The first step is to slot the copper alloy strip; among them: the number of slots is 3, the slot width is 2mm, and the slot depth is 0.2mm; the width of the copper strip is 150mm, the thickness is 1mm, and the distance between any two slots is 40mm;

[0097] The second step is to clean the grooved copper alloy strip and aluminum alloy strip obtained in the first step; among them: the width of the aluminum strip is 2.5mm, the thickness is 0.2mm; the cleaning speed is 10m / min, twice Cleaning, the surface of the strip is a new rough surface;

[0098] The third step is to carry out thermal compounding on the tape after cleaning, and the thickness of the tape after compounding is 0.8mm;

[0099] The fourth step is to perform solid-phase annealing on the compound strip, wherein: the temperature is 200°C, the time is 8h, and the atmosphere...

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Abstract

The invention discloses a Cu-Al composite material, a miniature circuit breaker coil block and a preparation method thereof. The Cu-Al composite material is a partially one-side Al-coated Cu or Cu alloy material strip which is manufactured in a compositing way through embedding an Al strip in a groove of a Cu or Cu alloy material strip. In the miniature circuit breaker coil block, a coil is formed by coiling an Al wire or Al alloy wire; a connecting plate is prepared from a Cu-Al composite material; the joint of the coil and the connecting plate is placed in an Al-coated area of the connecting plate. The preparation method of the miniature circuit breaker coil block comprises the following steps: performing thermal treatment on the Cu-Al composite material; cold rolling; striping; stamping; processing a coil ; connecting the coil and the connecting plate together. According to the preparation method, the connecting plate made of partially-Cu-embedded composite Al material is connected with the Al coil, to obtain a coil assembly; therefore, the problem of connection between the coil and the connecting plate can be solved effectively; the Cu-Al composite material has low cost reduced by 60% in comparison with the cost of the traditional material; the Cu-Al composite material has excellent processing performance and further has the advantage of high yield, good oxidation resistance and light unit weight.

Description

technical field [0001] The invention relates to an electromagnetic induction coil and its connecting plate material in the technical field of electrical components, in particular, it relates to a copper-aluminum composite material, and the copper-aluminum composite material is used for a small circuit breaker coil And its connecting plate and its preparation method. Background technique [0002] With the development of society and economy, whether it is industry, agriculture, commerce, national defense, or health, finance, and people's daily life, the demand for electricity is also increasing, and the requirements for the operation and protection of the power supply network are getting higher and higher. come higher. The miniature circuit breaker is a distribution appliance widely used in low-voltage power distribution terminals. It undertakes the function of short-circuit and overload breaking protection. The performance of the electromagnetic coil and its connecting plate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H3/28H01H69/00
CPCH01H3/28H01H69/00
Inventor 陈林驰
Owner WENZHOU HONGFENG ELECTRICAL ALLOY
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