Laser welding head for welding metal components, comprises an optical path for welding beam, a rotatable positioning element in optical path of the welding beam, and means for rotating the rotatable position elements

摘要

The laser welding head (2) comprises an optical path for welding beam (4), a rotatable positioning element (28) in optical path of the welding beam, means for rotating the rotatable positioning elements, means for optically detecting the position of welding joint, and means for the translation of the laser welding head. The actual position (14) of the welding beam is changeable through the rotation of the positioning element. The means for the detection of the position of the welding joint produces a correction signal for the correction of the actual position of the welding beam. The laser welding head (2) comprises an optical path for welding beam (4), a rotatable positioning element (28) in optical path of the welding beam, means for rotating the rotatable positioning elements, means for optically detecting the position of welding joint, and means for the translation of the laser welding head. The actual position (14) of the welding beam is changeable through the rotation of the positioning element. The means for the detection of the position of the welding joint produces a correction signal for the correction of the actual position of the welding beam in dependent upon a lateral deviation of target position. The rotation axis (30) of the position element is arranged parallel to welding direction. The welding beam is diverted through the rotatable positioning element in the middle around 90[deg] . A dichroic mirror is arranged as rotatable positioning element. The rotation axis of the positioning element is arranged parallel to translation direction of the means for translation. The welding beam passes transverse to welding direction before hitting on the rotatable positioning element. The means for detecting the position of the welding joint enables an arrangement guiding its measuring position in welding direction above the actual position of the welding beam and the interval of the measuring position forwarding to actual position of the welding beam is selected so that the produced correction signal is directly usable without pre-calculation for actuating the means for rotating the rotatable positioning element. An independent claim is included for a method for laser welding metal parts.