Production method of copper clad aluminum superfine flat wire with high width-to-thickness ratio

Abstract

The invention discloses a production method of a copper clad aluminum superfine flat wire with a high width-to-thickness ratio. The method comprises the following producing steps that: (1) an aluminum rod or aluminum magnesium alloy rod is paid off and is peeled through a surface processing machine, and the surface processing machine adopts nitrogen gas for protection during skin removing; then the aluminum rod or aluminum magnesium alloy rod and copper strips pass through a cladding machine together, so that the copper strips clad the processed aluminum rod or aluminum magnesium alloy rod, and a primary copper clad aluminum wire is obtained; (2) the primary copper clad aluminum wire is immediately drawn through multiple drawing machines until the diameter of the wire achieves the necessary requirement; (3) the drawn primary copper clad aluminum wire is flattened for many times, and the copper clad aluminum superfine flat wire with the high width-to-thickness ratio is obtained. According to the method, the environment is protected, the width-to-thickness ratio of the flat wire is larger than 20:1, and aluminum cannot be exposed; the surface area of a conductor is increased, and the current-carrying capacity of the conductor is increased; and the copper clad aluminum superfine flat wire is used for replacing the application of a copper conductor with the same current-carrying capacity to some fields, therefore, the cost of raw materials is greatly reduced, and the resource is saved.

Description

technical field [0001] The invention relates to a production method of a copper-clad aluminum ultra-fine flat wire, in particular to a production method of a copper-clad aluminum ultra-fine flat wire with a high aspect ratio. Background technique [0002] Copper-clad aluminum wire is a kind of bimetallic wire, which is coated with a layer of copper with a certain thickness on the surface of the aluminum wire, making the wire a high-performance bimetallic wire, and its copper thickness is about half the minimum. 3.5%. Its conductivity is about 62.9% of that of copper wire. The length of copper-clad aluminum wire of the same weight is 2.7 times the length of pure copper wire. In addition, due to its light weight, copper-clad aluminum allows the use of insulating materials with lower density and lighter weight, thereby reducing signal attenuation. At the same time, because the thermal expansion coefficient of copper-clad aluminum is almost the same as that of the aluminu...

AI Technical Summary

Problems solved by technology

[0007] Therefore, the cleanliness of the blank is very high, the total processing rate from the blank to the finished product is low and multiple annealing is required, due to the huge difference in metal mechanical properties between copper and aluminum, it is easy to cause a small processing rate drawing process Medium, partial peeling reduces yield and conduction efficiency

When preparing copper-clad aluminum busbars for flat wires, it is necessary to perform complicated pre-treatments such as straightening and cleaning of the copper strips and aluminum rods used, which not only increases the environmental burden, but also has low production efficiency and high production costs; acid and alkali cleaning The final aluminum rod is easy to cause partial peeling during the wire drawing process, reducing the yield and conductivity; the width-thickness ratio of the flat wire is generally 3-8:1, and it is difficult to be greater than 10:1