A method for detecting defects on a welding seam during a laser - welding process

摘要

A method for the detection of errors, on a welding seam (4) during a laser - welding process, in particular of weaving flaws and / or by welding errors at the overlap joint of galvanized metal sheets, comprises the steps of: two-dimensionally locally resolved detection of radiation, from a to a liquid bath (1) adjoining, solidified melt (3) is emitted, determining at least one parameter for the dissipation of heat in the solidified melt (3) by evaluating the detected radiation along at least one profile section (10, 11) of the solidified melt (3), and an error is detected at the weld seam (4) by comparing said at least one parameter with at least one reference value.