FRICTION STIR WELDING METHOD FOR ALUMINUM ALLOYS Russian patent published in 2024 - IPC B23K20/12 B23K103/10 

FIELD: welding.

SUBSTANCE: invention relates to friction stir welding technologies and can be used in welding aluminium alloys. The method of friction stir welding of aluminium alloys consists in the fact that the welding tool is moved with rotation and the application of axial force, and during the welding process the heat input is adjusted. At the initial stage, the tip of the welding tool is immersed with rotation and the application of axial force into the surface of the elements being joined until the temperature of the aluminium alloys along the leading edge of the shoulder reaches 450-500°C. Next, the welding process is organized cyclically, with each cycle consisting of the stage of moving the rotating welding tool in steps equal to 0.4-0.5 of the shoulder diameter, and the stage of heating the aluminium alloys using the rotating welding tool, the duration of which is determined by the formula: τ_ni = 246 - 2.6ω, where τ_ni is the time of heating of aluminium alloys to a temperature along the leading edge of the shoulder equal to 450-500°C within the current cycle i; ω is the speed of rotation of the welding tool.

EFFECT: optimal heat input is ensured along the entire length of the weld and, as a result, more efficient and uniform mixing of aluminium alloys.

1 cl, 4 dwg