METHOD FOR MONITORING AND/OR CONTROLLING IN A CLOSED LOOP A LASER WELDING PROCESS ON THE BASIS OF OCT-CAPTURED MELT BEAD OR WELD BEAD GEOMETRY AND ASSOCIATED PROCESSING MACHINE AND COMPUTER PROGRAM PRODUCT

A method for monitoring and/or controlling in a closed loop a laser welding process for welding together two workpieces of metallic material includes, during the laser welding process, scanning a melt pool and/or a melt bead using an optical coherence tomography (OCT) measurement beam in at least on...

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Bibliographische Detailangaben
Hauptverfasser: Speker, Nicolai, Hermani, Jan-Patrick, Sautter, Bjoern, Bocksrocker, Oliver
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A method for monitoring and/or controlling in a closed loop a laser welding process for welding together two workpieces of metallic material includes, during the laser welding process, scanning a melt pool and/or a melt bead using an optical coherence tomography (OCT) measurement beam in at least one line scan, determining an actual geometry of the melt pool and/or the melt bead based on the at least one line scan, and setting at least one welding parameter controlled in the closed loop based on a deviation of the actual geometry from a target geometry of the melt pool and/or the melt bead.