A laser-arc hybrid welding method for high-strength steel T-joint vertical welding

CN116532802BActive Publication Date: 2026-06-05SHIPBUILDING TECHNOLOGY RESEARCH INSITITUTE (NO 11 INSTITUTE OF CSSC) +1

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: SHIPBUILDING TECHNOLOGY RESEARCH INSITITUTE (NO 11 INSTITUTE OF CSSC)
Filing Date: 2023-05-29
Publication Date: 2026-06-05

AI Technical Summary

Technical Problem

Existing technologies make it difficult to achieve multi-position, efficient, and reliable welding of high-strength steel T-joints in complex longitudinal structures, especially in vertical welding, where problems such as weld formation difficulties, weld bead defects, and stress concentration exist.

Method used

The laser-arc hybrid welding method is adopted. By adjusting the parameters of the laser and the arc, the vertical weld with a single-sided V-shaped bevel is formed. The arc melts the filler wire in front, and the laser performs annealing behind to reduce residual stress and deformation.

Benefits of technology

It improves the adaptability and reliability of welding, simplifies the process, reduces production costs, improves welding efficiency and quality, and results in uniform weld formation without obvious undercut, and reduced residual stress and deformation.

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Abstract

The application discloses a laser-arc hybrid welding method for vertical welding of high-strength steel T-shaped joint, comprising the following steps: S1 pretreatment: machining a groove at the edge of the longitudinal bone to be welded of the workpiece to be welded, polishing and cleaning the pre-welding area of the bottom plate, and fixing the two in a T shape and vertically to the ground; S2 welding: the welding direction is vertically upward, the arc heat source of the welding gun is fixed in front along the welding direction, and the laser heat source is fixed at a certain distance behind; one-side laser-arc hybrid welding is carried out on the T-shaped joint, and after the welding is completed, the other side is welded after the test plate is cooled. The application completes the vertical welding process of the plate welding joint by using the characteristics of the laser-arc hybrid heat source, solves the problem that flat welding cannot be carried out due to the limiting factors such as the geometric shape, size and weight of the component, the process flow is simple and efficient, the pre-welding preheating, post-welding heat treatment and machining processes are avoided, the implementation flexibility is high, the welding efficiency is improved, and the production cost is reduced.

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