Tailored beamshape sequences for welding using a Dynamic Beam Laser

The industry requires high efficiency and superior quality in welding metals, particularly for complex geometries and hard-To-weld materials. In the past decades the laser has proven to be the right tool for fast and reliable welding. Especially superimposed beam oscillations in the kHz-domain enhance welding results by distributing heat over a wider area, reducing distortion and spatter. Another recent approach is to create multiple spots, lines, squares as well as intensity modulation between center and ring. Due to technological restrictions, these two common approaches are limited to rather static beamshapes. They lack the ability to be truly dynamic in the MHz-domain and therefore are unable to reach fine dynamic control over the melt pool. This paper presents the unique possibilities of coherent beam combining to create dynamic beamshape sequences for melt pool control tailored to copper and aluminum welding.