Treatment method for copper twisted wire

A treatment method and copper stranded wire technology are applied in the annealing field of copper stranded wires, which can solve problems such as oil sludge cannot be removed, copper stranded wires turn black, and copper stranded wires do not shine on the surface, so as to achieve good finish, shiny surface, Uniform effect of antioxidant capacity

Inactive Publication Date: 2007-10-17
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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Embodiment Construction

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

[0011] The stretched copper wires are made into electrical soft stranded wires on the twisting machine, and the electrical soft stranded wires are coiled in sequence in an annealing furnace that can be sealed. 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. Put the annealing furnace into a heater with electric heating facilities. After the preparations for annealing treatment are ready, start the vacuum equipment to take out the air in the annealing furnace to make the pressure in the annealing furnace be -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...

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Abstract

A technical handling method of cuprum wires cross relates to the annealing process of cuprum wires cross and comprises the following steps: putting cuprum wires cross into a annealing furnace, pumping air in the furnace to form negative-pressure in the furnace, filling the furnace with carbon dioxide protective gas; performing a heating treatment of two stages under pressure, performing a gas releasing decompression processing between stages, then cooling-down slowly in the furnace for 0.3-1 hour, and opening the furnace to cool-down naturally to atmospheric temperature. Therefore, electrical soft wires cross through such annealing treatment has brightening surfaces and excellent finish, without greasy dirt or other soils; exhibits uniform flexibility and strong antioxidant ability, and can be stored for a long time.

Description

technical field [0001] The invention relates to an annealing method, in particular to an annealing method for copper strands. Background technique [0002] Before the present invention was proposed, during the production and processing process of the copper wire, the copper wire was drawn, stretched, twisted and wound. Stress is bound to be generated inside the copper wire, and it is locally hard and easy to oxidize. This crude product cannot be further processed into copper soft stranded wire. Therefore, it is necessary to anneal the copper strands. The general practice is to use nitrogen as a protective gas to perform annealing in an annealing furnace. First extract air from the annealing furnace to form a negative pressure to a certain extent, then fill it with nitrogen, and form a pressure in the furnace, heat it to about 300 ° C for a certain period of time, and then turn on the furnace to cool naturally. After such annealing treatment, the internal stress and prest...

Claims

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Application Information

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