High-precision welding-free special copper coil manufacturing process

Abstract

The present invention proposes a manufacturing process for a high-precision welding-free special copper coil, which includes the following steps: step 1, selecting high-purity cathode copper as a raw material to produce a blank tube, and making high-volatile drawing oil for use; step 2, using raw materials The produced blank tube is stretched with high volatile drawing oil, and the elongation coefficient of each stretch is controlled between 1.3-1.5, and after 7-9 passes of stretching, the semi-finished product is obtained; step 3, the stretched semi-finished product is obtained. For annealing, the annealing method adopts low-temperature annealing method; step 4, in the annealing process, inert gas is used for purging, and the purging method is that a vent pipe is connected to the outer port of the semi-finished product, and the inert gas is blown to the inner wall of the semi-finished product through the vent pipe. Sweep to obtain the final product, whereby the present invention has the advantages of being able to carry out the welding-free connection of the copper coil through the improvement of raw materials and technology, and at the same time ensuring the degree of fit.

Description

technical field [0001] The invention belongs to the technical field of welding-free special copper coil pipes, and particularly relates to a manufacturing process of high-precision welding-free special copper coil pipes. Background technique [0002] At present, welding-free technology is used to manufacture copper coils in the market, in order to improve the sealing performance of the copper coils. However, ordinary R410A copper coils are often used in the existing copper coil manufacturing process. It is made as a raw material, but its smoothness, flexibility, roundness, and wall thickness uniformity cannot meet the technical requirements of welding-free connection. After connection, it is easy to cause leakage due to poor fit. SUMMARY OF THE INVENTION [0003] The invention proposes a high-precision welding-free special copper coil manufacturing process, which can realize the welding-free connection of the copper coil through the improvement of raw materials and technol...

AI Technical Summary

Problems solved by technology

[0002] At present, the welding-free technology is now used in the market to manufacture copper coils. In order to improve the airtightness of the copper coils, however, ordinary R410A copper coils are often used in the existing copper coil manufacturing process. It is produced as a raw material, but its smoothness, flexibility, roundness, and wall thickness uniformity cannot meet the technical requirements for solder-free connection. After connection, it is easy to cause leakage due to weak fit.

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