Trumpf Laser- Und Systemtechnik Gmbh

Trumpf Werkzeugmaschinen Gmbh + Co. Kg

Steffen Kessler

Tim Hesse

David Schindhelm

Winfried Magg

Jan-Patrick Hermani

Patrick Haug

Holger Braun

Friedhelm Dorsch

Philipp Scheible

Marcel Schäfer

Boris Regaard

Marcel Schafer

Marcel SCHÄFER

A workpiece processing machine that includes: a beam emission head for providing a beam for processing the workpiece, an optical interferometer for splitting, redirecting, and detecting the beam, an adjustment element for changing a second portion of a power of the beam redirected from a retroreflector to a detector, and a control unit for actuating the adjustment element to control a ratio between a first power portion of the beam redirected from the workpiece to the detector and the second power portion of the beam redirected from the retroreflector to the detector to a target ratio.

Workpiece processing machine and method for processing a workpiece, in particular by welding

Methods for determining the quality of a weld of a workpiece welded by laser-beam welding, wherein at least a partial region of a molten pool and/or of a surrounding area of the molten pool is observed by means of a measuring system during the laser-beam welding and the quality of the weld of the welded workpiece is determined on the basis of the observation result. At least one characteristic value that correlates with molten pool oscillation of the molten pool is observed during the laser-beam welding and a measure of an amplitude of the molten pool oscillation and/or a measure of a frequency of the molten pool oscillation is determined from the observed time curve of the characteristic value. A probability and/or a frequency for the occurrence of hot cracks at the weld of the workpiece is inferred.

Detection of hot cracks in laser welding

Growing community of inventors

Stuttgart, Germany

Steffen Kessler