Trumpf Werkzeugmaschinen Gmbh + Co. Kg

Oliver Bocksrocker

Tim Hesse

Boris Regaard

David Schindhelm

Winfried Magg

Volker Rominger

Stefanie Epple

The disclosure relates to methods and apparatuses for controlling a cutting process in which a workpiece is cut by a high-energy beam. A process light signal is detected emanating from an interaction region of the high-energy beam with the workpiece in a first wavelength range (&#x394;&#x3bb;), in which at least one metallic constituent (Fe, Cr) of the workpiece has at least one emission line, and in a second wavelength range (&#x394;&#x3bb;), which differs from the first wavelength range, in which continuum radiation of the workpiece without emission lines is detectable. Vaporization of the at least one metallic constituent (Fe, Cr) is monitored on the basis of an intensity of the process light signal detected in the first wavelength range (&#x394;&#x3bb;) and on the basis of an intensity of the process light signal detected in the second wavelength range (&#x394;&#x3bb;).

Methods and apparatuses for controlling cutting processes

A device for monitoring, in particular for closed-loop control, of a thermal cutting process carried out on a workpiece. The device includes a focusing unit for focusing a machining beam, in particular a laser beam, onto the workpiece for the formation of a kerf on the workpiece. The device also includes an image acquisition unit to generate at least one image of a region of the workpiece, and an evaluation unit configured to determine, based on the at least one image, at least one measured variable for the course of the gap width of the kerf in a thickness direction of the workpiece. The invention also relates to an associated method for monitoring, in particular for closed-loop control, of a thermal cutting process carried out on a workpiece.

Monitoring a thermal cutting process

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Stuttgart, Germany

Oliver Bocksrocker