PROCESS FOR PREPARING THE SEAM REGIONS OF COATED WORKPIECES FOR LASER BEAM WELDING AND LAP JOINT FOR WELDING COATED WORKPIECES

摘要

A process for preparing the seam regions (20) of coated workpieces (2, 3) for laser beam welding (5), especially galvanised sheet steel, in which knurled type surface structures in the region of the weld seam (50) which provide a space (a) between adjacent workpiece surfaces (44, 45) are produced. In order to improve a process with the steps described above in such a way that the drawbacks entailed by the mechanical process are avoided, in which the process is to be used especially also for three-dimensional adjacent workpiece surfaces, the knurled surface structures (51, 51') are produced by pulsed high-energy beams.