Swinging laser filler wire welding method of medium-thickness plate T-shaped joint fillet welding seam

Abstract

The invention relates to the technical field of welding, and discloses a swinging laser filler wire welding method of a medium-thickness plate T-shaped joint fillet welding seam. In the medium-thickness plate T-shaped joint fillet welding process, by means of a laser beam which periodically swings in the welding direction and with the assistance of a filler wire, fillet welding seam welding is carried out, wherein the swinging direction is perpendicular to the welding direction. According to the swinging laser filler wire welding method of the medium-thickness plate T-shaped joint fillet welding seam, in the welding process, the laser beam swings periodically in a "I" shape and perpendicular to the welding direction, and a molten pool is uniformly stirred so as to widen the width of the welding seam, so that the large-size, large-penetration, high-efficiency and low-deformation welding process is achieved, and the adaptability of laser welding to plate gaps and the sensitivity of welding throat thermal cracks can be remarkably improved compared with a single laser.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to an oscillating laser wire-filled welding method for T-shaped joint fillet welds of medium and thick plates. Background technique [0002] As one of the most common joint forms, T-joint fillet welds are widely used in many fields such as automobiles, ships, and steel structures. Traditional welding methods usually use gas shielded welding (GMAW, GTAW). Although the weld quality is good and the cost is low, the single-pass weld penetration is insufficient, the welding heat input is large, and the welding deformation is large, especially in welding. For thick plates, multi-layer and multi-pass welding is required, which causes serious welding deformation and low efficiency. [0003] In recent years, with the continuous development of laser welding, many traditional welding methods in the form of weld joints have been replaced by laser welding due to its advantages such as lar...

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Problems solved by technology

[0004] The object of the present invention is aimed at the problem of low production efficiency and large welding deformation of the conventional welding method for T-joint fillet welds of medium and thick plates in the prior art, and the low adaptability of ordinary laser wire filler welding to the assembly gap, For the problem of shallow effective root penetration, a method of oscillating laser wire-filling welding for T-joint fillet welds of medium and heavy plates is proposed. The oscillating laser wire-filling welding method is used to uniformly stir the molten pool during welding to widen the width of the weld , realize the welding process of large size, large penetration depth, high efficiency and low deformation

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