Welding method and welding system of beveled T-joint

Abstract

The invention relates to the field of welding technology, in particular to a welding method and a welding system for a grooved T-shaped joint. The welding method includes: on the groove structure of the T-shaped joint, several groups of continuously arranged welding positions are respectively selected along the length direction of the groove structure, and each group of welding positions includes at least two non-groove positions located in the groove structure. The welding point on the side, and at least one welding point on the groove side of the groove structure; the self-level welding position uses the oblique triangle line to continuously weld each welding point along each group of welding positions until it is completed . This welding method can carry out reasonable heat input allocation according to the structural difference between the groove side and the non-groove side of the groove structure, and eliminate the welding toe pinch, weld leakage, and weld penetration on the back of the weld caused by the unreasonable distribution of arc heat input. And other bad back forming problems, to obtain uniform and beautiful back forming welds, and significantly improve the welding quality of the welds.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a welding method and a welding system for a grooved T-shaped joint. Background technique [0002] MAG welding refers to molten active gas shielded arc welding. MAG welding can obtain stable welding process performance and good welding joints, and can be used for welding in various positions. When MAG welding is used to flat-weld a grooved T-joint (namely PA position), in order to ensure the root penetration of the welded joint and obtain a good back shape, it is necessary to adjust the assembly gap, the blunt edge of the groove, and the welding parameters. And the welding method of backing welding, etc., are clearly required. Among them, the welding method of backing welding has become the most critical factor affecting the penetration of the root and obtaining a good back forming. [0003] In traditional welding methods, the "straight line", "zigzag" or "oblique circle" gun mo...

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Problems solved by technology

[0005] The embodiment of the present invention provides a welding method and welding system for a beveled T-joint, which is used to solve the problem in the prior art that the arc heat input cannot be distributed between the beveled side and the non-groove side, resulting in poor forming of the back side Defects, used to significantly improve the weld quality of weld seams

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