Double two-sided synchronous tungsten electrode high-frequency pulse argon arc welding butt welding method

Abstract

A double two-sided synchronous tungsten electrode high-frequency pulse argon arc welding butt welding method is implemented by the following steps: cleaning up sundry, carrying out groove processing on the welding position of a wall plate of a stainless steel storage tank, welding position welding, choosing welding torch equipment, aligning a same weld pool by a main welding torch and an auxiliary welding torch from the inside and outside of a weld joint respectively synchronously, arcing synchronously by the main welding torch and the auxiliary welding torch, enabling the auxiliary welding torch to be moved synchronous to the main welding torch, welding along the same direction at the same speed, and stopping arcing by the main welding torch and the auxiliary welding torch synchronously. By adopting the double two-sided synchronous tungsten electrode high-frequency pulse argon arc welding butt welding method, the inner side forming of the weld joint is protected and penetrated, the defects of oxidation, overlap, lack of penetration and the like of the weld joint are avoided, the processes of root clearing, grinding and re-welding on the inner side are omitted, compared with the prior art, the method has the advantages of simple method and easy implementation, the production efficiency is greatly improved, and the labor intensity of workers is lowered.

Description

technical field [0001] The invention relates to a welding method for steel storage tank walls, in particular to a construction method for simultaneous internal and external double-sided welding of the vertical seam and circular seam argon arc welding double guns of the stainless steel storage tank wall. Background technique [0002] The steel storage tank is a welded container whose wall plate thickness increases from top to bottom. It has many welds and various plate thicknesses, and large wave deformation often occurs during construction. As a kind of steel storage tank container, stainless steel storage tank is mostly made of austenitic stainless steel (such as SUS304, SUS315L, 307, etc.). Austenitic stainless steel has a small thermal conductivity and a large expansion coefficient, and it is easier to weld. Large deformation and welding stress are generated, and at present, in the manufacturing process of stainless steel container equipment, it is often encountered that ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a two-person double-sided synchronous tungsten-electrode high-frequency pulse argon arc welding butt welding method. The internal stress is large. Due to the effect of single-sided stress, welding deformation is easy to occur, which increases the number of times the weld is heated and increases the probability of weld deformation. It is also necessary to solve the technical problem that the inner side is easily oxidized to produce black when using argon arc welding. flow, carbonization, root cleaning operations are required, many welding times, labor intensity of workers is high, technical problems of low production efficiency, and anti-oxidation measures cannot guarantee the shape and quality of the inner side of the weld when welding between stainless steel plates. Increase the welding cost; and solve the problem of shallow weld penetration, low penetration rate, narrow adaptation range of plate thickness, high porosity sensitivity and poor joint plasticity when using hydrogen tungsten arc welding, which affects weld formation and quality technical issues

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