A kind of anti-oxidation copper wire annealing method

Abstract

The invention provides an anti-oxidation copper wire annealing method, comprising: pre-spraying: spraying an ethanol aqueous solution with a concentration of 5%-10% into the annealing tube, the spraying time is 2s, and the spraying amount is 2ml / s; Annealing: Make the copper wire pass through the annealing furnace at a speed of 1-5m / s. The temperature distribution of the annealing furnace is: 0m-3m is 385°C-660°C, 3m-6m is 385°C-660°C, and 6m is 385°C- 660°C; Spraying: When a certain copper wire stops in step 3, spray a 5%-10% ethanol aqueous solution into the corresponding annealing tube, the spraying interval is 120s, and the single spraying time is 2s. The volume is 2ml / s. The invention uses compressed air to spray ethanol aqueous solution to the annealing tube, and forms steam through the high temperature of the annealing tube to prevent oxygen from entering the annealing tube, and utilizes the reducibility of ethanol to reduce the oxidized part, effectively preventing oxidation from blackening, and improving product quality ; Use the controller to control the solenoid valve, implement automatic spraying, precise control, avoid waste of ethanol water solution and compressed air, and further reduce production consumption.

Description

technical field [0001] The invention relates to the field of copper wire processing, in particular to an anti-oxidation copper wire annealing method. Background technique [0002] Copper wire is widely used in the manufacture of wires, cables and other products, and is an indispensable material in modern industry. In the process of copper wire processing, annealing treatment is usually required to achieve the purpose of reducing hardness, eliminating residual stress, reducing deformation and crack tendency, refining grains, etc. [0003] When the copper wire is heated and annealed, it is easy to oxidize with the oxygen in the air, resulting in the deterioration and blackening of the surface quality of the copper wire, which affects the quality of the copper wire. Especially when the wire needs to be changed or the wire is disconnected and needs to be connected and stopped, the copper wire will be more seriously affected by the high temperature state for a long time, and the...

AI Technical Summary

Problems solved by technology

However, these steam protection devices all need to use high-pressure steam, and the generation of high-pressure steam requires long-term operation of the steam generator (such as a boiler), which is huge in size, high in energy consumption, and has a high failure rate of the steam generator due to easy generation of scale.

[0006] On the other hand, nitrogen, carbon dioxide or water vapor protection methods cannot restore the oxidized part, and the protection effect is not good.

[0007] At present, some enterprises use alcohol as a reducing agent for copper wire annealing, such as "An Anti-oxidation Device for Copper Wire Drawing and Annealing" (Application No. 201510521192.5), which is equipped with a wiper for wiping the copper wire and a dropper at the exit of the annealing furnace. The dripping device is equipped with anti-oxidation liquid such as alcohol, and the copper wire is cleaned and anti-oxidized through the anti-oxidation liquid such as alcohol; but because the device is located behind the annealing furnace, it can only prevent oxidation of the annealed copper wire treatment, but cannot prevent the oxidation of the copper wire in the annealing tube, the reduction treatment after the oxidation occurs, the influence of the copper wire cannot be completely eliminated, on the other hand, this scheme is aimed at a single copper wire, but the actual production Most of the time, dozens of copper wires are annealed at the same time. This scheme has a multi-layer structure and copper wires need to penetrate into it. The actual operation is cumbersome and difficult to maintain.

[0008] Another solution, such as the utility model patent with the application number CN201720832974.5, provides a copper wire annealing furnace protection device, specifically setting an alcohol brush in front of the annealing furnace, and using copper wires to continuously bring alcohol into the annealing tube , to generate protective gas and reduce copper oxide, there is a defect in this scheme: because the copper wire is used to carry alcohol into the annealing furnace, when the copper wire stops, it cannot continue to carry alcohol

In actual production, when it is necessary to wire or change wires, it is inevitable to stop the wire. At this time, the copper wire will be oxidized and blackened due to staying in the high-temperature annealing furnace for a long time, which will reduce the quality and fail to meet the standard.

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