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
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[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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