A welding method based on deep penetration welding machine

Abstract

The invention belongs to the field of welding technology, and discloses a welding method based on a deep penetration welding machine. pool; perform the arc forward operation, move the arc forward to the second welding point, so that the arc moves to the unwelded base metal to directly melt the base metal, and then form the second molten pool, and the arc forward operation will stir the first The metal solution in the molten pool promotes the overflow of impurities in the molten pool metal; continue to perform the arc forward operation until the arc is moved forward to the Nth welding point, so that the arc moves to the unwelded base metal and directly melts the base metal, and then forms In the Nth molten pool, the arc forward operation will stir the metal solution in the N-1th molten pool to promote the overflow of impurities in the molten pool metal. The welding method provided by the invention can solve the problem that the deep penetration welding machine reduces the groove angle and the gap welding process, which easily leads to narrow and deep weld seam cross-sectional shape, and generates hot cracks.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a welding method based on a deep penetration welding machine. Background technique [0002] In the prior art, the design standard for the joint groove angle of the fillet weld of the T-shaped joint of the steel structure is: 35°-60° on one side, and the gap is 2-4 mm. However, in actual production, in order to ensure full penetration of the weld root, the actual groove angle is basically 45°-55°, and the gap is 4mm; this leads to a large increase in weld filling and weld heat input. The welding deformation increases, the consumption of welding materials and the welding workload increase greatly. For this, a deep penetration welding machine can be used to increase the penetration depth so as to reduce the groove angle and gap to a certain extent to reduce heat input and suppress thermal deformation; however, designing the groove parameters in this way will result in a narrow and...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a welding method based on a deep penetration welding machine, which solves the technical problem that in the prior art, the welding process of reducing the groove angle and gap by a deep penetration welding machine is likely to cause a narrow and deep weld cross-sectional shape and generate thermal cracks

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