Process and apparatus for welding workpieces with two or more laser beams whose spots are oscillated across welding direction

摘要

Laser welding process and apparatus wherein a plurality of laser beams (32a, 32b) are focussed by a focussing device (30) on surfaces of workpieces (14a, 14b) such that spots of the laser beams are located in the vicinity of an interface (16) of the workpiece as viewed in a direction perpendicular to a direction of extension of the interface, and the beam spots and the workpieces are fed relative to each other by a feeding device (43, 54, 56) in the direction of extension of the interface, while at the same time the beam spots are oscillated by an oscillating device (36, 40) at a predetermined frequency relative to the workpieces in a direction intersecting the direction of extension of the interface such that the beam spots are moved across the interface.