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Treatment method for copper twisted wire

A processing method and technology of copper stranded wire, applied in the field of annealing of copper stranded wire, can solve the problems of blackening of copper stranded wire, non-glossy surface of copper stranded wire, and inability to remove sludge, etc., to achieve bright surface, good finish, Even effect of antioxidant capacity

Inactive Publication Date: 2009-07-08
曹惠忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of this copper strand is not shiny, just like the natural color of copper wire; the dirt and sludge on the surface of the copper strand cannot be removed; the copper strand will still be oxidized and partially blackened after being stored for about a year

Method used

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Examples

Experimental program
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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the examples.

[0011] The copper wire that has been pulled and stretched is made into an electrical soft stranded wire on a stranding machine, and the electrical soft stranded wire is coiled in turn in a sealable annealing furnace. There are temperature and pressure measuring instruments on the annealing furnace, as well as the interface for gas in and out and the alarm device for overpressure heating. The annealing furnace is placed in a heater with an electric heating facility. After the preparations for the annealing treatment are ready, start the vacuum equipment, remove the air in the annealing furnace, make the furnace pressure -0.04MPa, then connect the annealing furnace with the carbon dioxide cylinder, and fill the annealing furnace with carbon dioxide.

[0012] When the pressure in the annealing furnace reaches 0.6-0.65MPa, stop the gas supply and cut off the connection between the ann...

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PUM

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Abstract

The invention discloses a process treatment method for copper stranded wires, which relates to an annealing method for copper stranded wires. Put the copper stranded wire into the annealing furnace, remove the air in the furnace to form a negative pressure, and fill it with carbon dioxide protective gas; carry out two-stage heating treatment under pressure, carry out degassing and pressure-reducing treatment between stages, and then slowly cool in the furnace Cool down for 0.3 to 1 hour, turn on the furnace to cool down to atmospheric temperature naturally; the electrical soft stranded wire annealed in this way has a shiny surface, no oil and other dirt, and a good finish; uniform softness, strong oxidation resistance, and long-term storage.

Description

technical field [0001] The present invention relates to an annealing method, in particular to an annealing method of copper stranded wires. Background technique [0002] Before the present invention is proposed, in the production and processing process of the copper wire, the copper wire is pulled and stretched and twisted and wound. Stress is bound to occur inside the copper wire, and local hardening is easy to oxidize. This crude product cannot be further processed into stranded copper wire. Therefore, it is necessary to anneal the copper stranded wire. The general practice is to use nitrogen as a protective gas to carry out annealing treatment in an annealing furnace. First extract air from the annealing furnace to form a negative pressure to a certain extent, then fill with nitrogen, and form a pressure in the furnace, heat it to about 300 ℃ and keep it for some time, and then open the furnace and cool it naturally. After such annealing treatment, the internal stress...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/08
Inventor 曹林元
Owner 曹惠忠
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