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Measurement of cut front properties in laser cutting

: Thombansen, U.; Hermanns, T.; Molitor, T.; Pereira, M.; Schulz, W.


Schmidt, F.:
Laser Assisted Net Shape Engineering 8 : International Conference on Photonic Technologies, Proceedings of the LANE 2014, September 08-11, 2014, Fürth, Germany
Amsterdam: Elsevier, 2014 (Physics Procedia 56.2014)
International Conference on Laser Assisted Net Shape Engineering (LANE) <8, 2014, Fürth>
International Conference on Photonic Technologies <2014, Fürth>
Conference Paper, Journal Article
Fraunhofer ILT ()

Cut-front properties are a key variable in laser-cutting and thus of major importance for self-optimization. Within the Cluster of Excellence at RWTH Aachen University, several achievements were made in setting up sensor-systems that provide information on the operating-point of this melt-based manufacturing process. These achievements contribute to a gradual increase in system-transparency which is seen as an enabler for self-optimization.
Instead of searching for a single measurand to characterize the course of the process, an approach is being presented which establishesa surrogate criterion to allow determination of the current operating-point. In the depicted area, this is done by joining sources of information from process observation, determining boundary-conditions such as actual feed-rate and modeling of process-variables. Although process-variables like properties of the cutting-front are influenced through more than one process parameter, a concept for a sensor-system is reported showing the correlation between properties of the melt-front and the current feed-rate. The results are compared to a solution derived from process-simulation.