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

A production method and technology for bus ducts, which are applied to open busbar installation, circuits, electrical components, etc., can solve problems such as environmental pollution, long time, and poor product quality, and achieve the effect of improving the working environment and avoiding the pickling process.

Inactive Publication Date: 2010-12-15
浙江力博实业股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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 environme

Method used

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

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Experimental program
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Effect test

Embodiment Construction

[0038] 1. Upward continuous casting oxygen-free copper rod

[0039] High-purity cathode copper is selected as raw material, which is preheated and dried before melting. The water pressure of the crystallizer is 2-4MPa, the temperature of the crystallizer outlet water is controlled at 35°C-50°C, and the temperature of the copper liquid is 1150°C±10°C. Using an online degassing and deoxidizing device, the copper liquid is filled with high-purity argon or nitrogen, and the metered amount of argon or nitrogen is pressed into the copper liquid through the controlled rotating graphite shaft and rotor and broken into tiny bubbles, so that It is evenly dispersed in the copper liquid. Air source outlet pressure 0.5~1MPa, flow rate 0.5~1.5Nm 3 / n. The surface of the copper liquid is covered with dried charcoal and graphite flakes. The oxygen-free copper rod is drawn up by the clutch type vacuum of the traction unit, and then the oxygen-free copper rod enters the take-up device. The ...

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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 and packaging. 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. ...

Claims

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Application Information

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IPC IPC(8): H01B13/00H02G5/02B23P15/00
Inventor 姚幼甫徐高磊陈国龙
Owner 浙江力博实业股份有限公司
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