Flux-cored wire gas-shielded vertical upward welding process method

Abstract

The invention discloses a flux-cored wire gas-shielded vertical upward welding process method. The process method starts from butt joint of a vertical weld of a thin-wall plate in a vertical barrel project, the selected research range of the wall thickness is 6-10 mm, and a self-protection flux-cored wire single-sided water-cooled copper liner forced forming welding process method is adopted. Theprocess method comprises the following steps that a V-shaped groove is formed in a vertical weld plate first, an angle alpha of the groove is 60 + / - 2.5 degrees, a gap b is 4 + / - 0.5 mm, a blunt edged is 0 + / - 0.5 mm, misalignment tolerance c is less than or equal to 1.5 mm, a back face is formed by adding a water-cooled copper liner in a forced mode, and the welding gun position, welding parameters and the like are adjusted and controlled, so that single-face welding is carried out and double-face forming are realized, and the back face of the flux-cored wire is free of gouging. According tothe flux-cored wire gas-shielded vertical upward welding process method, the problem that welding quality and efficiency are influenced due to the fact that automatic welding and single-face weldingdouble-face forming are difficult to realize in the vertical barrel thin wall plate in the industry is solved, and double improvement of welding quality and efficiency of the vertical welding of the vertical barrel thin-wall plate is realized.

Description

technical field [0001] The invention belongs to the technical field of vertical cylinder automatic welding, and particularly designs a flux-cored welding wire air-protected vertical upward welding process. Background technique [0002] The vertical cylinder vertical seam is automatically welded, and the gas-electric vertical welding process is conventionally used. Gas electric vertical welding is similar to ordinary metal gas shielded welding in terms of welding arc and droplet transfer, and similar to electroslag welding in terms of welding forming and mechanical system. It is an efficient automatic welding process that can realize single-sided welding and double-sided welding. The surface is forced to be formed at one time, the welding process is stable, the operation is simple, and the weld quality is excellent, but the recommended thickness application range is 10-32mm. For the vertical seam welding of thin-walled plates with a thickness of 6-10mm, gas-electric vertical ...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, provide a flux-cored welding wire air-protected vertical upward welding process, and solve the problem that it is difficult to realize automatic welding of vertical cylinder thin-walled plates in the industry, and single-sided welding and double-sided welding cannot be realized. Surface forming, the problem that affects the welding quality and efficiency, can adapt to the upward vertical welding process with a plate thickness of 6-10mm, and meets the requirements of the welding process, which improves the automation of vertical butt joints of thin-walled plates in vertical cylinders, shortens the construction period, and reduces Reduce production cost, realize the double improvement of vertical seam welding quality and efficiency of thin-walled plate

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