Solid wire gas shielded vertical upward welding method

Abstract

The invention discloses a solid wire gas shielded vertical upward welding method. According to the solid wire gas shielded vertical upward welding method, for automatic welding of a vertical seam of the material having a heat input strict requirement of a storage tank project, the wall thickness range of optional research is larger than or equal to 6 mm, solid wires are adopted, front-side protection is performed through the gas composed of 80% of Ar and 20% of CO2 or 98% of Ar and 2% of O2, and back-side protection is performed through a water cooled copper lining. When the wall thickness is6-12 mm, a V-shaped groove is formed, a gap is reserved, a truncated edge is avoided, the butt joint unfitness is controlled, one-sided welding and double-sided formation are adopted, and the back side is free of back chipping. When the wall thickness is larger than 12 mm, double asymmetrical V-shaped grooves are formed, a gap is reserved, a truncated edge is avoided, the butt joint unfitness is controlled, the water cooled copper lining is added to the back face, and forced formation is performed. Two water cooled copper linings are involved and used for back-sided protection of the V-shapedgroove and the X-shaped groove. The solid wire gas shielded vertical upward welding method solves the problem that in the industry, vertical welded plates of a storage tank device have strict heat input requirement and do not allow electro-gas vertical welding, guarantees the welding quality and welding efficiency and reduces the welding cost.

Description

technical field [0001] The invention belongs to the technical field of automatic welding of storage tanks, and particularly designs a solid welding wire air-protected vertical upward welding process. Background technique [0002] The vertical seam automatic welding of the storage tank project generally adopts the gas-electric vertical welding process, but the current and voltage of the gas-electric vertical welding are relatively large, and the general recommended thickness application range is 10-32mm. The heat input of the gas-electric vertical welding is relatively large, which will cause wall The plate is seriously deformed. For some materials with strict heat input requirements, gas-electric vertical welding is not allowed for welding in the project, which affects the automation degree of the storage tank project and its construction period. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the shortcomings o...

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Problems solved by technology

[0002] The vertical seam automatic welding of the storage tank project generally adopts the gas-electric vertical welding process, but the current and voltage of the gas-electric vertical welding are relatively large, and the general recommended thickness application range is 10-32mm. The heat input of the gas-electric vertical welding is relatively large, which will cause wall The plate is seriously deformed. For some materials with strict heat input requirements, gas-electric vertical welding is not allowed in the project, which affects the automation degree of the storage tank project and its construction period.

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