Backing ring made from red copper in use for plasma arc welding sheet metal and fabricating method

Abstract

A supporting ring for the plasma arc welding of thin plate is made up of red copper through drawing raw red copper wire multiple passes, cutting short by needed size, shaping and correcting. It can improve welding quality.

Description

technical field [0001] The invention relates to a backing ring for plasma arc welding, in particular to a red copper backing ring for thin plate plasma arc welding and a manufacturing method thereof. Background technique [0002] Traditionally, when plasma arc welding is performed on thin metal plates with a thickness of less than 0.8mm, the back-shaped backing plate fixture must be used to assemble the compression weldment. In order to weld the stainless steel corrugated sheet of the mechanical seal of the bellows, the steel forming pad manufactured by mechanical processing is commonly used at present. Welding of steel forming backing rings or brass forming backing rings, and the yield rate of steel forming backing rings and brass forming backing rings processed by machining methods is 80%. Using this method to process plasma arc welding backing rings, a lot of metal is wasted and energy, which increases production costs. Since the thermal conductivity of steel forming bac...

AI Technical Summary

Problems solved by technology

[0002] Traditionally, when plasma arc welding is performed on thin metal plates with a thickness of less than 0.8mm, the back-shaped backing plate fixture must be used to assemble the compression weldment. In order to weld the stainless steel corrugated sheet of the mechanical seal of the bellows, the steel forming pad manufactured by mechanical processing is commonly used at present. Welding of steel forming backing rings or brass forming backing rings, and the yield rate of steel forming backing rings and brass forming backing rings processed by machining methods is 80%. Using this method to process plasma arc welding backing rings, a lot of metal is wasted and energy, which again increases production costs

Since the thermal conductivity of steel forming backing rings and brass forming backing rings is not as good as that of copper, the weld quality is not as good as that of copper. Although copper has good thermal conductivity and is the best material for hot rings for plasma arc welding, it is difficult to Machining on a lathe

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