On-line annealing method and apparatus for rolling copper pipe

Abstract

The invention relates to a method and a device for annealing rolling copper tubes on line, which belongs to the technical field of forming metal tubes through rolling, wherein the method for annealing comprises following procedures: forming through rolling, washing, filling nitrogen, heating, preserving heat, cooling and drying. The device comprises a tractor which clamps and propels a copper tube to transverse through a transition section, a heating section, a heat preserving section, a cooling section and a drying section which are communicated in turn, wherein a hollow electromagnetic coil is installed in the heating section. The invention selects an LG-H type rolling mill to form tube blank through rolling which is casted through an upward continuous casting system, and the rolling mill is originally a two-roll planetary cold rolling mill which is used to roll stainless steel tubes. The process method and a device for annealing on-line after rolling provide more reliable guarantee for increasing the mechanical property, the oxidation resistance and the service life of materials, which further increases and stabilizes the quality of products, the requirements of the copper tubes with high precision are completely satisfied, and the method and the device realize the production targets of high quality, high efficiency and low energy consumption for small and medium-sized enterprises.

Description

Technical field [0001] The invention relates to an online annealing method and equipment for rolled copper pipes, and belongs to the technical field of metal pipe rolling and forming processing. Background technique [0002] The processing method of the copper pipe is to take the pipe blank of corresponding specifications that is made by upward continuous casting or extrusion, and then after several times of drawing, it is coiled into a pit furnace and annealed into a pipe. This method generally has low production efficiency, uneven temperature, low dimensional accuracy, large meter weight error, and very unstable quality, so there are many waste products and cannot meet the demanding requirements of the air conditioning industry. Moreover, the production cycle is long, equipment investment and operating costs are high, energy consumption is high, labor is occupied, and labor intensity is high, which is not conducive to the production of small and medium-sized pipes in small and ...

AI Technical Summary

Problems solved by technology

This method generally has low production efficiency, uneven temperature, low dimensional accuracy, large meter weight error, and unstable quality, so there are many waste products and cannot meet the stringent requirements of the air-conditioning industry.

Moreover, the production cycle is long, equipment investment and operating costs are high, energy consumption is high, labor force is occupied, and labor intensity is high, which is not conducive to the production of small and medium-sized pipes in small and medium-sized enterprises.

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