METHOD FOR ANALYSING A WELD DURING LASER WELDING OF WORKPIECES

摘要

The invention relates to a method for analysing a weld during laser welding of workpieces (30a, 30b), comprising: - detecting (S1) a first measurement signal (P1, P2) for process radiation generated during laser welding; - detecting (S2) a second measurement signal (P3) for radiation reflected by the workpieces (30a, 30b); - determining (S3), on the basis of the first measurement signal (P1, P2), whether there is a gap (S) between the workpieces (30a, 30b); and - if it is found that there is a gap (S), determining, on the basis of the second measurement signal (P3), whether a weld exists.