Intelligent and efficient welding method of thin-wall stainless steel

Abstract

The invention discloses an intelligent and efficient welding method of thin-wall stainless steel, and belongs to the field of welding of the machine building industry. The defect in the prior art areovercome. According to the method, P+T complex process welding equipment is adopted, and a welding method of combining plasma arc welding and argon tungsten-arc welding through an automatic control system is adopted. In the welding process, a workpiece is fixed, and a welding gun moves. Plasma arc welding and argon tungsten-arc welding can be synchronously completed in the welding process, and canalso be completed step by step. According to a step method, after through welding is carried out at a time through plasma arc welding, automatic wire filling is carried out through argon tungsten-arcwelding, and face covering is completed. When the thickness of a plate ranges from 3 mm to 8 mm, chamfering is not needed, and the synchronous method can be used. When the thickness of the plate is larger than 8 mm, chamfering is needed, and the step method can be used. The method is high in welding quality, single-face welding and double-face forming can be achieved, and welding efficiency is greatly improved; and welding materials are saved, the labor environment is improved, and the method is widely suitable for welding of circular longitudinal seams and plate seams of a thin-plate stainless steel container.

Description

Technical field [0001] The invention belongs to the field of mechanical manufacturing welding, in particular to the welding of thin-walled stainless steel. Background technique [0002] Due to its good high temperature and corrosion resistance, stainless steel is widely used in electric power, petrochemical, metallurgy and other industries. According to the traditional welding process, when welding thin-walled stainless steel, manual argon tungsten arc welding, electrode arc welding and automatic submerged arc welding are generally used. The above welding methods all need to be grooved. Compared with carbon steel, stainless steel has a smaller thermal conductivity, larger linear expansion coefficient, and larger resistivity. When welding thin-walled stainless steel containers using electrode arc welding and submerged arc automatic welding processes, if the welding heat input is large, welding will occur. Deformation; beveling and reverse rooting increase production costs. ...

AI Technical Summary

Problems solved by technology

Compared with carbon steel, stainless steel has a smaller thermal conductivity, larger linear expansion coefficient, and larger resistivity. When welding thin-walled stainless steel containers using electrode arc welding and submerged arc automatic welding processes, if the welding heat input is large, welding will occur. Deformation; beveling and back rooting increase production costs

Manual argon tungsten arc welding can achieve single-sided welding and double-sided forming, and its heat input is small, but its efficiency is too low

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