Laser processing machine

US9358636B2 · kind B2 · utility

Assignee

• TRUMPF Werkzeugmaschinen GmbH + Co. KG · DE

Inventors

• Gerhard Hammann · Ditzingen, DE
• Ulrich Ritter · Ortenberg, DE
• Dirk Fey · La Souterraine, FR
• Giovanni Sanfelici · Karlsruhe, DE
• Gunther Krieg · Karlsruhe, DE

Key dates

• Filing date: Dec 20, 2010
• Grant date: Jun 7, 2016
• Expiry date: Dec 20, 2030

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K2101/18
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A laser processing machine for processing workpieces includes a beam guide containing a gas atmosphere, and also includes an apparatus for investigating the gas atmosphere in the beam guide for impurities. The investigation apparatus makes use of the photoacoustic effect. The measuring apparatus has a measuring chamber and at least one measuring head, where the beam guide acts as the measuring chamber. As a measuring chamber, the beam guide contains the gas atmosphere that is to be investigated and also a modulated laser beam modulated. The measuring head(s) are integrated into the beam guide and are used to detect the photoacoustic effect in the measuring chamber.