Production method for copper clad aluminum busbars

Abstract

The invention discloses a production method for copper clad aluminum busbars. The production method comprises the following steps: removing oxide layers on the surfaces of both copper pipes and copper bars; inserting the copper bars into the copper pipes to form CCA (Copper Clad Aluminum) rods, then placing the CCA rods into a vacuum tank and vacuumizing; then achieving high-frequency induction heating treatment on the CCA rods placed into the vacuum tank, and stopping heating when aluminium cores in the whole rods are completely molten; finish-rolling the rods to obtain copper clad aluminum busbar materials after the temperature of the rods decrease below 650 DEG C, and then cooling the copper clad aluminum busbar materials to the ordinary temperature; saw-cutting the drawn and shaped copper clad aluminum busbar materials according to the process length; placing the cut-to-length copper clad aluminum busbar materials into a vacuum annealing furnace for bright annealing to obtain end products; and at last, placing the end products into an automatic packaging line for packaging and then warehousing. The copper clad aluminum busbar end products produced by adopting the method have high copper and aluminium bonding strength, stable quality and high yield.

Description

technical field [0001] The invention relates to a production method of a copper-clad aluminum row. Background technique [0002] Copper-clad aluminum bar is a kind of bimetal with aluminum as the matrix, and the outer layer is uniformly coated with copper, so that a permanent interatomic metallurgical bond is formed between them. The surface is bright, smooth and free of defects. It is a new type of conductor material that combines the high-quality and stable electrical conductivity of copper with the low-cost performance of aluminum and lower contact resistance. [0003] The traditional copper-clad aluminum row production method is: [0004] 1) Deoxidize the surface of copper tubes and aluminum rods; [0005] 2) Insert the aluminum rod into the copper tube and tie the head (seal both ends of the copper tube); [0006] 3) Send the tied copper-clad aluminum rod into the heating furnace, adjust the furnace temperature to 350°C, and heat the copper-clad aluminum rod; [000...

AI Technical Summary

Problems solved by technology

[0011] However, this traditional process has the following disadvantages: although the two ends of the copper tube have been tied, it is difficult to avoid the gap between the aluminum rod and the copper tube, and the air remains in the gap, which is heated by the heating furnace. The surface of copper and aluminum will be oxidized. Although it has been hot-rolled and drawn, the consistency and reliability of the finished copper-clad aluminum row cannot be guaranteed, resulting in a decline in the yield