Method and apparatus for determining a depth of penetration during laser welding

摘要

The invention relates to a method for determining a depth of penetration (t) during a laser - welding process and / or after a laser - welding process of workpieces (4), comprising the steps of: two-dimensionally locally resolved detection of the intensity of radiation (2b), which, during the welding process of a liquid molten bath and a subsequent to the liquid melt bath, solidified melt is emitted, determining geometric variables (m1,.., mn) of the molten bath and the solidified melt on the basis of the detected radiation intensity in a spatially resolved manner in two dimensions, and determining a parameter (k_T) for the depth of penetration (t) as a function of at least one geometric size (m1) of the molten bath (21) and at least one geometric size of the solidified melt (23). The present invention also relates to a computer program product for carrying out the method and an apparatus (1) for carrying out a laser.