Copper wire drawing and annealing method

Abstract

The invention discloses a copper wire drawing and annealing method. The copper wire drawing and annealing method comprises the following steps that a nitrogen storage tank is sequentially connected with a dryer, a flow meter, a switch valve and an annealing cabin through a linkage pipe, after nitrogen is dried through the dryer, the air pressure is displayed in real time through the flow meter, the switch valve controls supply and cut-off of the nitrogen, and the nitrogen finally enters a seal pipe of the annealing cabin; the seal pipe is full of the nitrogen, then, a copper wire is made to pass through the seal pipe, the copper wire penetrates through the seal pipe and enters the annealing cabin, and annealing is conducted through a first annealing wheel and a second annealing wheel; an electrode is annealed through the first annealing wheel and the second annealing wheel, large current is evenly conducted to the copper wire, and copper wire preheating and heating are achieved; duringpreheating, the copper wire is heated to 250 DEG C; during heating, the copper wire is heated to 500-550 DEG C, and the copper wire is re-crystallized; and the nitrogen protects a heating section, copper wire oxidation is prevented, the copper wire is subjected to water cooling, and the annealing process is finished. According to the annealing method, the product quality is improved, the productqualification rate and quality are improved, and the annealing cost is reduced.

Description

technical field [0001] The invention belongs to the field of copper wire processing, and in particular relates to a copper wire drawing annealing method for reducing annealing energy consumption. Background technique [0002] During the copper wire drawing process, when the wire is plastically deformed, the crystal lattice is distorted and some mechanical, physical and chemical properties change. The appearance of work hardening reduces the plasticity of the wire, and the deformation resistance, such as yield strength and hardness, increases, the electrical conductivity and thermal conductivity decrease, and the chemical corrosion resistance decreases. In order to solve this problem and at the same time improve the properties of the metal, we must take measures, namely annealing. That is, at a certain temperature, the metal is recrystallized, the damaged lattice is restored, the phenomenon of work hardening is eliminated, and the properties of the metal are restored to the ...

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Problems solved by technology

However, in this protection method, the temperature of the steam is high, which accelerates the aging of the rubber seals and bakelite insulating wheels of the equipment, resulting in the leakage of steam and coolant. At the same time, water molecules are attached to the surface of the copper wire. When the temperature of the copper wire cools, the copper The surface of the wire is also prone to oxidation, and the rate of copper formation is low, which affects the product quality

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