Dr. rer. nat.
Dirk Petring

c/o Fraunhofer ILT
Steinbachstr. 15
52074 Aachen
Germany

Tel. +49 162 49 162 01
contact@calcut.de
www.calcut.de

.	Track record
1986	Establishment of the Cutting Group at Fraunhofer ILT
1987	Oxide-free and burr-free laser beam fusion cutting of up to 6 mm stainless steel
1988	Theory and practical verification of power balance and absorption distribution
1988	Schlieren-diagnostic identification of supersonic effects within cut kerfs
1989	Oxide-free and burr-free laser beam fusion cutting of up to 15 mm stainless steel
1989	Promotion of the Cutting Group to the Department Cutting
1991	Laboratory prototype of a laser slitting line with 2 lasers and cutting heads (GEORG)
1991	Laser slitting of 0.27 mm thick electrical steel with 100 m/min (THYSSEN)
1991	Laser machining of steel cavities by Lasercaving (MAHO)
1993	Industrial laser beam fusion cutting up to 18mm stainless steel (THYSSEN)
1993	Completion of CALCut as steady-state 3D-model and simulation of laser cutting
1993	Submission of the PhD dissertation “Application oriented modelling of laser beam cutting for computer aided process optimization“ (in German)
1994	Invention of the Autonomous Nozzle
1995	PhD certificate from the RWTH Aachen University
1996	Laser beam cutting and welding of steel plates at German shipyard (Blohm+Voss)
1996	Laser beam fusion cutting of 40 mm stainless steel plates for the ITER project
1996	Invention of laser process closed-loop control by modulation response signals
1998	Industrial pilot line of a laser slitting line with 8 lasers and cutting heads (GEORG)
1998	Expansion of the Department Cutting to the Department Cutting & Joining
1999	Deep penetration welding of steel with diode laser (DILAS)
2001	Laser-GMA butt-joint hybrid welding of 15 mm mild steel in a single pass
2002	Lloyd’s Register Certification laser-GMA hybrid welding stainless steel tubes (RIVIT)
2002	Invention closed-loop controlled synchronized modulation of laser-arc hybrid welding
2006	Industrial implementation of laser combi-head for cutting and welding (LASERFACT)
2008	Explanation of the thermodynamics of the oxidation reaction in laser-oxygen cutting
2008	High-speed cutting 1mm UHS steel with 4 kW fiber laser at 100 m/min (HONDA)
2010	Downsizing of the Department to the Group Macro-Joining & Cutting
2012	Clarification of peculiarities of the fiber laser cutting process
2013	Multi-pass scan strategy to minimize thermal damage in laser cutting of composites
2017	In-situ-visualization of multiple reflections on the cut flank during fiber laser cutting
2019	Invention of the laser cutting whistle
2023	Optical cutting process control via AI-inferencing with classification accuracy 0.98
2023	Split-up and handover of the Group Macro-Joining & Cutting in two separate units

CALCut is a model and simulation tool self-developed and privately owned by Dr. Dirk Petring since 1993. It has been used exclusively for Fraunhofer Institute for Laser Technology ILT 1993-2023 where it has been verified and approved in numerous industrial projects.