Manufacturing method for copper covered flat aluminum wire

A technology of copper-clad aluminum flat wire and manufacturing method, which is applied in the direction of cable/conductor manufacturing, transformer/inductor coil/winding/connection, conductor, etc., can solve the problem of self-heaviness of motors, transformers and electrical equipment, and copper-clad aluminum has not yet been found Flat wire product reports, copper consumption and other problems, to achieve the effect of saving copper, obvious social benefits and economic significance, and reducing its own weight

Inactive Publication Date: 2008-02-27
FUSHI INT DALIAN BIMETALLIC CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lead to heavy motors, transformers and electrical equipment, high copper consumption and

Method used

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Embodiment

[0022] The content of the present invention is further described in detail through examples. The process is as follows: the surface-cleaned copper strip and aluminum rod are cold-bent by a group of grooved rollers in an inert gas environment to form a copper sleeve with an aluminum core in the middle, and the pipe seams are welded by argon arc welding, and the two are left together. There is an appropriate gap, and the weight ratio of copper is in the range of 40-47%; the copper-clad aluminum wire billet is drawn through a series of wire drawing dies on the wire drawing machine, and the temperature of the billet wire should be lower than 240°C, and the total deformation should not be low at 60%; anneal the limited diffusion layer in a well-type, box-type or bell-type furnace filled with nitrogen protection, the annealing temperature is between 290-350 ° C, and keep warm for 60-150 minutes; it is carried out on a two-roll flat roll mill For rolling, the ratio of roll diameter t...

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Abstract

The present invention relates to a production method of copper clad aluminum wire, especially a production method of copper clad aluminum flat wire. Its process steps are shown as follow: (1) the copper clad aluminum welding is carried through under the protection of inert gas; (2) a series of drawing are carried through by the dies of drawing machine, and the wire temperature should be kept below 240deg.C when the drawing is going on, until the scheduled total deformation is achieved; (3) the anneal of diffusion restricted layer is carried through in annealing furnace which is filled with inert gas for protection, and when the scheduled temperature is reached, this temperature will be kept for 60-150 minutes; (4) at least one time of rolling should be taken on the high mill of which the roll diameter matches to wire diameter, and the scheduled size should be reached; (5) the finish drawing is carried on drawing machine with rectangle dies to reach the geometry size of a finished product; (6) softening, anneal and wire collection are carried through in inert gas environment. The present invention has advantages of saving 53-60% of copper material, stable and reliable performance, and absorbs the both advantages of copper and aluminum. The contact surface has reached metallurgical bonding, and the self weight has been reduced.

Description

technical field [0001] The invention relates to a copper-clad aluminum wire production method, in particular to a copper-clad aluminum flat wire production method. It is suitable for use in the winding production of motors, transformers and electrical equipment. Background technique [0002] As we all know, although pure copper wire has the advantages of good electrical conductivity, low resistance, and high mechanical strength, its application is limited due to its high price, high weight and high cost. [0003] Based on the above reasons, copper-clad aluminum wires have come out in recent years, which organically integrates the advantages of the two into one conductor. On the premise of ensuring the reliability of use, it not only reduces the weight and cost, but also saves a lot of copper. Therefore, it has a strong competitive advantage as soon as it comes out, and is widely used in power supply systems such as low-voltage power distribution, switchboards, motor control...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B5/00H01F27/28
Inventor 傅利高扬腾守利
Owner FUSHI INT DALIAN BIMETALLIC CABLE
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