Carbon steel pipeline flux-cored wire all-position motorized welding MAG backing welding process

Abstract

The invention relates to the technical field of carbon steel pipeline backing welding, in particular to a carbon steel pipeline flux-cored wire all-position motorized welding MAG backing welding process. The carbon steel pipeline flux-cored wire all-position motorized welding MAG backing welding process comprises the steps that appropriate welding parameters are set on a welding power source; through a power supply, a wire and a contact tube, welding current and welding voltage trigger an electric arc with a welding bead through a flux-cored wire for welding; the flux-cored wire is automatically conveyed from a wire reel through a wire feeding wheel; the flux-cored wire forms a welding seam on the pipeline through electric arc melting, and then welding of the next welding seam continues; and after the welded junction is assembled, a ceramic gasket on the back of the root weld of a round pipe is tightly attached to the center of the inner wall weld of the welded junction, and a U-shaped groove is formed in the middle of the ceramic gasket. According to the carbon steel pipeline flux-cored wire all-position motorized welding MAG backing welding process, the construction cost can be reduced, the welding efficiency is improved, the adaptability is high, the welding quality and efficiency are remarkably improved, and the labor intensity of operators is relieved.

Description

technical field [0001] The present disclosure relates to the technical field of carbon steel pipeline bottom welding, and in particular to the MAG bottom welding process of carbon steel pipeline flux-cored wire all-position motorized welding. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the increasingly large-scale installations in the petrochemical industry, the diameter and wall thickness of the construction pipes are also increasing. At present, the increase in welding volume is in conflict with the reduction of social welder resources. Improving the efficiency of welding construction has become an urgent problem to be solved. At present, the conventional const...

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Problems solved by technology

[0005] In addition, the conventional welding method using solid wire welding is mainly used for filling and covering welding of large-diameter pipes. It does not have the characteristics of the root root welding process and has certain limitations. It cannot complete the entire weld in one welding. Because the formation of a complete and mature welding process needs to connect the entire welding construction process with each other, the curing of each process and each welding process parameter is very critical

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