Reduction of gap between sheet parts during laser welding

摘要

Gap between two or several workpieces is reduced and workpieces are joined by transmitting an impulse to at least one of the workpieces, the length and intensity of the impulse being such that at least one of the workpieces undergoes elastic and/or plastic deformation in the direction of transmission of the impulse. Joining is pref. carried out by laser welding and the impulses are carried out at high frequency, either overlapping or spaced by a predetermined distance. Also claimed is an arrangement for carrying out the joining process. The arrangement having a laser beam source, equipment for positioning and holding the workpieces, and a rotationally-symmetrical ram which is driven axially onto the workpiece.