Patent ID: 11969825
Assignee: KIRCHHOFF AUTOMOTIVE DEUTSCHLAND GMBH
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A method for laser edge welding the end faces of the joints of two connecting flanges held in an adjoining manner of two connecting partners made of a steel material, wherein at least one of the connecting partners has a metal coating at least in the region of its connecting flange, the metal coating having a lower melting temperature than the steel material, the method comprising:
moving a laser welding beam in an advancement direction which follows the longitudinal expanse of the joints, the laser welding beam directed downwardly onto the end faces of the two connecting flanges, wherein each connecting flange has two side faces which face in opposite directions and which terminate at the end face of the connecting flange, with the end face extending between the two side faces, and wherein one of the side faces of each connecting flange is positioned facing one of the side faces of the other connecting flange, with the end faces of the two connecting flanges positioned adjacent each other in a plane facing upward;
oscillating the laser welding beam back and forth transversely to the advancement direction at a frequency between 100 Hz and 1000 Hz to melt material of the ends faces of the two connecting flanges and to keep a weld pool that forms due to the introduction of energy during laser welding liquid until degassing is completed, whereby the weld pool is kept liquid by dynamic energy introduced into the weld pool due to the oscillation frequency of the laser welding beam that impacts the joints, whereby a continuous weld seam is produced along the longitudinal expanse of the joints.