Bright-line-free welding process for stainless steel pipe after electroplating

Abstract

The invention relates to the technical field of welding, in particular to a bright-line-free welding process for a stainless steel pipe after electroplating. The welding process comprises the following steps that S1, a port of the stainless steel pipe and the part, within 10 mm, of the periphery of the port are polished to obtain metallic luster, and meanwhile, the stainless steel pipe is positioned; S2, for a priming coat, welding is carried out in the mode by which the interior of the overhead welding part is filled with a wire and the exteriors of the vertical welding part and the downwardwelding part are filled with the wire; S3, welding is started at the position 5 mm away from the port; S4, at the position, 2 mm away from a weldment, of the end portion of a tungsten electrode, the welding wire needs to be conveyed to the front end of a molten pool along the tangent point of the pipe along a groove, and the welding wire is molten through the high temperature of the molten pool; S5, when the rear half circle is welded, the overhead welding part of the front half circle is melted through an electric arc, and the welding wire is fed when a melting hole appears; and S6, the ending position is polished into a slope shape, wire feeding is suspended when welding reaches the slope, the slope position is molten into a molten hole through the electric arc, and finally closing is conducted. According to the bright-line-free welding process for the stainless steel pipe after electroplating, the problems that in the prior art, after being electroplated, a stainless steel pipe is not high in welding quality, and the phenomena that oxidation occurs and a connector is concave frequently occur are solved.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a bright-line-free welding process for stainless steel tubes after electroplating. Background technique [0002] Welding, also known as welding and welding, is a manufacturing process and technology for joining metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure. Welding achieves the purpose of joining through the following three ways: [0003] 1. Fusion welding - heating the workpieces to be joined to make them partially melt to form a molten pool, and then join after the molten pool is cooled and solidified. If necessary, fillers can be added to assist. It is suitable for welding processing of various metals and alloys. pressure. [0004] 2. Pressure welding - the welding process must exert pressure on the weldment, which belongs to the processing of various metal materials and some metal materials. [0005] 3. Brazing—Usin...

AI Technical Summary

Problems solved by technology

[0006] In the prior art, the welding quality of stainless steel pipes after electroplating is not high, and the phenomenon of oxidation and concave joints often occurs

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