METHOD OF LASER-ARC WELDING OF VERTICAL JOINTS OF THICK-SHEET STEEL STRUCTURES Russian patent published in 2016 - IPC B23K26/348 B23K26/40 B23K33/00 

FIELD: technological processes.

SUBSTANCE: invention relates to a method of laser-arc welding of thick-sheet steel structures and can be used in various industries. Hybrid laser-arc head is used. Arc burner is located in front of laser beam in the direction of its movement, grooving is made in X-shap, opening angle of which does not exceed 20° at each side, and nose ranges from 40 to 50% of the blank thickness. Node of X-shaped grooving is welded in one pass on all nose sections, when hybrid laser-arc welding head moves from top to bottom with the laser beam located perpendicular to the section of connection zone surface. Further filling at each side of grooving is made with transverse oscillations of laser-arc head.

EFFECT: high quality of welded joints due to increased strength, absence of lack of fusion and reduction of thermal influence zone size.

1 cl, 1 dwg