Manufacturing process of conductive copper-clad aluminum busbar with large cross section

Abstract

The invention relates to a manufacturing process of a conductive copper-clad aluminum busbar with a large cross section, which comprises the following steps that: the aluminum busbar with the large cross section which is polished is continuously coated by a polished copper strip, a joint which is formed when in coating is welded, then a copper-clad aluminum ingot is stretched, the stretched copper-clad aluminum ingot is arranged in a bright annealing furnace to be spread and annealed at low temperature, the annealing temperature is controlled to be 300DEG C to 350DEG C, the annealing time is controlled to be 30min to 60min, small-deformation controlled stretching is carried out to the copper-clad aluminum ingot which is spread and annealed at low temperature with the surface reduction rate being 5 percent to 10 percent, and a finished conductive copper-clad aluminum busbar product with the large cross section is obtained. According to the manufacturing process of the conductive copper-clad aluminum busbar with the large cross section, a process is simpler, corresponding equipment investment is low, and the manufacturing process has good development prospect.

Description

technical field [0001] The invention relates to a manufacturing process of a copper-clad aluminum bar, in particular to a manufacturing process of a large-section conductive copper-clad aluminum bar. Background technique [0002] Large cross-section copper-clad aluminum row usually refers to the cross-section of 300 ~ 1000mm 2 The copper-clad aluminum row, of which the aluminum core accounts for 75-85%, and the copper layer accounts for 15-25%. [0003] At present, some domestic enterprises use production techniques such as "electroplating method" or "casing method" to produce large-section copper-clad aluminum bars. However, because the copper coating is too thin, rolling and stretching are difficult, and the interface between copper and aluminum is not well bonded, it cannot meet the requirements for use. [0004] Foreign countries use large-tonnage extrusion machines to produce large-section copper-clad aluminum bars through the process of "hydrostatic extrusion" and "c...

AI Technical Summary

Problems solved by technology

This production process is quite mature at present, but the equipment investment required for this process is huge, and the process is relatively complicated, the process flow is long, and the production efficiency is low.

All of these make the production cost higher, which leads to the higher price of the finished large-section conductive copper-clad aluminum busbar.