Method for processing copper tube having circular inside and quadrate outside

Abstract

The invention discloses a method for processing a copper rube having a circular inside and a quadrate outside. The method comprises the steps of: 1) adopting high-pure cathode copper as a raw material and vacuum up-drawing in a clutch type way and continuously casting an oxygen-free copper rod by using a dragger group; 2) processing the oxygen-free copper rod from step 1) to form a copper tube blank having the circular inside and the quadrate outside by a continuous extruding machine group; 3) stretching the copper tube blank having the circular inside and the quadrate outside formed in step 2) by a high-precision stretcher; 4) annealing the stretched copper tube blank having the circular inside and the quadrate outside obtained in step 3) by bright annealing equipment; and 5) inspecting and packing the annealed copper tube blank having the circular inside and the quadrate outside obtained in step 4). The method provided by the invention has the characteristics of being low in energy consumption, high in yield, high in production efficiency, and long in the product length. In the method, the sum of content of copper and silver is not less than 99.99%; the content of oxygen is not more than 5ppm, and the electric conductivity is not less than 101% IACS (International Annealed Copper Standard).

Description

technical field [0001] The invention relates to a method for processing an inner circle and outer square copper tube, which belongs to the technical field of nonferrous metal processing. Background technique [0002] The copper tube with inner circle and outer square has the characteristics of large conductive cross-section, large flow rate of cooling medium per unit time, and good heat dissipation performance. It is used by the atomic energy industry and the electrical machinery industry as a key material for manufacturing various motors and accelerators. [0003] Copper tubes with inner circle and outer square are generally processed by one of the following five traditional techniques: [0004] A: Ingot casting—extrusion tube billet—rolling—intermediate annealing—stretching—annealing; [0005] B: Ingot casting—extrusion tube billet—stretching—annealing; [0006] C: ingot casting - piercing - rolling (stretching) - annealing; [0007] D: cast pipe - rolling - intermediat...

AI Technical Summary

Problems solved by technology

[0009] The traditional production process of inner circle and outer square copper pipes has disadvantages such as large investment scale, low yield, limited product length, low production efficiency, and high energy consumption.

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