A k-type groove for large plate laser and arc hybrid welding and a welding method

Abstract

The application discloses a K-shaped groove for laser and arc hybrid welding of a large plate and a welding method, belongs to the technical field of welding manufacturing and structural connection, and is composed of a first base material and a second base material. The first base material is provided with a groove. The groove comprises a straight edge and a first bevel located on both sides of the straight edge. A single-sided groove angle alpha is formed between the straight edge and the first bevel. The second base material is provided with a blunt edge. The blunt edge comprises a square edge and a second bevel located on both sides of the square edge. An outer side groove angle alpha0 is formed between the second bevel and the straight line part of the square edge. The application can expand the natural tolerance of the assembly gap g and the misalignment amount h from the source by systematic design and parameter coupling of the cross-sectional geometry of the K-shaped groove, so that the laser-arc hybrid welding can stably form a dense joint with a deep and narrow main molten core and a side wall filling area in the large plate scene, thereby improving the stability of the large plate welding.

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