Brass cored flux-cored welding ring and preparation method thereof

Abstract

The invention relates to a preparation method of a brass strip core flux-cored welding ring. The preparation method is characterized by comprising the following steps: preparing a brass rod material into a thin strip, curling the thin strip through a roller to form a U-shaped strip with an opening facing upwards, arranging a solid brass welding wire in the middle part of the U-shaped strip, conveying brass soldering flux to a gap between the U-shaped strip and the solid brass welding wire through a belt pulley, compressing the brass soldering flux by utilizing a pressing plate, pressing the U-shaped strip by utilizing a roller to enable the opening end of the U-shaped strip to be abutted to form a flux-cored welding wire of a tubular structure, cleaning the surface of the flux-cored welding wire by utilizing a brush wheel and a brush, and molding the flux-cored welding wire into a brass strip core flux-cored welding ring in a low-temperature resistance heating way or a cold machining way. By adopting the flux-cored soldering flux, the soldering efficiency and quality can be greatly improved, the soldering flux is tightly wrapped by a soldering flux skin, no notch exists, the content is stable, the welding performance is good, the production efficiency is high, the process is simple, and by adopting the design for wrapping the solid core with the soldering flux skin, the welding wire is convenient to machine into a ring shape.

Description

technical field [0001] The invention relates to a brass flux-cored welding ring with a core, which is especially suitable for use in high-frequency brazing and flame brazing equipment, and can be widely used in brazing in multiple industries such as refrigeration and machinery, and belongs to a new type of hard brazing Weld ring. Background technique [0002] Brass brazing filler metal can be used for brazing connection of steel and steel, copper and steel. Wet and spread, not weldable. However, the coating of flux will increase the operating time and is not conducive to the needs of automatic production. At the same time, when used in high-frequency welding, due to the high heating efficiency of high-frequency welding and the fast melting speed of the flux, the skin structure design of the common flux-cored wire cannot ensure that the flux flows out to the base metal in time, and the flux cannot dissolve the base metal. The oxide layer on the surface can easily lead to d...

AI Technical Summary

Problems solved by technology

[0002] Brass brazing filler metal can be used for brazing connection of steel and steel, copper and steel. Wetting and spreading, not solderable

The coating of flux will increase the operation time, and it is not conducive to the needs of automatic production

At the same time, when used in high-frequency welding, due to the high heating efficiency of high-frequency welding and the fast melting speed of the flux, the skin structure design of the common flux-cored wire cannot ensure that the flux flows out to the base metal in time, and the flux cannot dissolve the base metal. The oxide layer on the surface can easily lead to disconnection and cannot be wetted and spread, thus affecting practical applications

[0003] Because it is necessary to ensure that the solder has a certain filling amount when brazing components with large gaps, and when preparing the solder skin of the flux-cored solder, it cannot be processed into a flat ring because the solder skin is too thick, which affects the brass flux core. Application of large gap brazing of welding ring

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