Submerged-arc welding one-side welding double-side forming process

Abstract

The invention discloses a submerged-arc welding one-side welding double-side forming process, which relates to the technical field of welding, and comprises the following steps: symmetrically forming slope edges at a gap, positioning the inner diameter of a pipeline by an inner supporting device, positioning the outer diameter of the pipeline by an outer supporting device, arranging an inner supporting plate matched with the inner cambered surface of the pipeline, and fully paving welding flux on the top of the inner supporting plate. Adjusting the outer arc surface of the inner supporting plate to abut against the inner arc surface of the pipeline by using an adjusting assembly, and cooling the center of the inner supporting plate from the inner side of the pipeline; the inner supporting plate matched with the inner arc face of the pipeline is arranged at the inner gap of the pipeline, the adjusting assembly is used for adjusting the inner supporting plate to abut against the inner arc face of the pipeline, the single-face welding and double-face forming quality can be improved, and during welding, welding flux accumulated on the inner supporting plate can guarantee continuity of welding seams in the pipeline; the center of the inner supporting plate is cooled from the inner side of the pipeline in the welding process, the problem that weld beading or burnthrough is formed due to the fact that the surplus height of a back welding seam is too high can be avoided, and the double-face forming quality is further improved.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a submerged arc welding single-side welding double-side forming process. Background technique [0002] Single-sided welding and double-sided forming is a welding process that welds on one side and can form a good weld on the other side at the same time. It is mostly used in pipeline welding. [0003] In the actual welding process, the single-sided welding and double-sided forming process requirements are relatively high, and the welding process is very prone to weld discontinuity and unsightly problems, and the welding process lacks the fixing of the pipeline, which cannot guarantee the maintenance of the gap during the welding process temperature, which in turn affects the welding quality. At the same time, the residual temperature of the back weld is too high during the welding process, which may easily lead to the formation of weld bumps or burn-through. Therefore, the prese...

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Problems solved by technology

[0003] In the actual welding process, the single-sided welding and double-sided forming process requirements are relatively high, and the welding process is very prone to weld discontinuity and unsightly problems, and the welding process lacks the fixing of the pipeline, which cannot guarantee the maintenance of the gap during the welding process temperature, which in turn affects the welding quality. At the same time, the residual temperature of the back weld is too high during the welding process, which may easily lead to the formation of weld bumps or burn-through.

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