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Beam oscillation - periodic modification of the geometrical beam properties

: Goppold, Cindy; Pinder, Thomas; Herwig, Patrick; Mahrle, Achim; Wetzig, Andreas; Beyer, Eckhard

Fulltext urn:nbn:de:0011-n-3625653 (1.0 MByte PDF)
MD5 Fingerprint: 3489ca62ae9081881722ad528686836f
Created on: 21.7.2017

Wissenschaftliche Gesellschaft Lasertechnik -WLT-:
Lasers in Manufacturing, LiM 2015 : International WLT-Conference on Lasers in Manufacturing, LIM 2015, Munich, Germany, June, 22.-25., 2015
Munich, 2015
Paper 112, 8 pp.
International Conference on Lasers in Manufacturing (LIM) <2015, Munich>
Conference Paper, Electronic Publication
Fraunhofer IWS ()
laser fusion cutting; beam shaping; oscillation; dynamic; Cut Kerf

Sheet metal with thicknesses above 8 mm has a distinct cutting performance. The optical configuration, composed of fiber diameter, collimation and focal length, allows for many opportunities to influence the stationary beam geometry. Previous analysis points out the limits of this method in the thick section area. The achieved cut quality of a stationary beam shape is restricted by the laser power. Most operators would like to improve the cutting results without changing their available laser sources, even for thicker materials. To overcome some limits, new approaches are desired. Within the present study an experimental investigation of fiber laser fusion cutting of thick section stainless steel was performed, by means of dynamical beam oscillation. The aim is to compare stationary and dynamical beam shaping, through evaluation of the cut quality, the kerf geometry, and the applied process parameters. The investigation emphasizes promising procedural possibilities for improvements of cutting performance in fiber laser cutting of thick stainless steel.