Production method of conducting copper bars for bus duct with large flakiness ratio

Abstract

The invention discloses a production method of conducting copper bars for a bus duct with a large flakiness ratio, belonging to the technical field of processing of non-ferrous metals. The production method is characterized by comprising the following steps of: upward continuously casting oxygen-free copper bars, continuously extruding copper bar billets, rolling, annealing, drawing, checking andpackaging. By adopting the continuous extrusion technology to produce the copper bar billets, the continuous production can be realized, and the weight of each roll of copper bar billets can reach more than 3 tons. Moreover, because the copper bar billets are produced in a roll shape, the defect of cutting the head and the tail of each copper bar in the traditional production process is avoided, and the yield of the product reaches more than 90%. Meanwhile, by reasonably setting continuous extrusion process parameters, rolling rate and the like, the invention effectively improves the quality of the product and has the advantages of high purity, low oxygen content, high conductivity, excellent surface quality and the like. The product is detected to show that the content of Cu and Ag is greater than or equal to 99.97%, the content of O is less than or equal to 10ppm, and the conductivity is 98-101% according to the IACS.

Description

Technical field: [0001] The invention belongs to the technical field of non-ferrous metal processing, and in particular relates to a production method of a conductive copper bar of a busway with a large width-thickness ratio. Background technique: [0002] Because of the advantages of safety and reliability, large capacity, small size, short design and construction period, series matching, convenient assembly and disassembly, and long service life, busway is suitable for power supply in large shopping malls, exhibition halls, gymnasiums, airports and high-rise buildings. Bus duct is generally composed of protective shell, conductive bar, insulating material and related accessories. The product specification of bus duct conductive copper bar is obviously different from that of switchgear conductive copper bar. The width of bus duct conductive copper bar is generally above 180mm. Its aspect ratio is generally greater than 20, such as 180mm×6.3mm, 200mm×7.1mm, 250mm×10mm, etc. ...

AI Technical Summary

Problems solved by technology

This process adopts semi-continuous casting or continuous casting, the weight of the ingot is limited, and the auxiliary time required for extrusion is long; each copper bar after extrusion needs to be headed and then drawn, which wastes a long time

[0007] 2. The yield is low

[0008] 3. Poor working environment

The method of pickling is adopted in the production of this process, which is poor for the working environment and has certain pollution to the environment.

[0009] 4. Poor product quality

The surface quality of the products produced by this process is poor, and the conductivity is generally 97% to 100% IACS

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