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Energetic efficiency of remote cutting in comparison to conventional fusion cutting

: Lütke, M.; Hauptmann, J.; Wetzig, A.; Beyer, E.


Journal of laser applications : JLA 24 (2012), No.2, Art. 022007, 7 pp.
ISSN: 1042-346X
ISSN: 1938-1387
Journal Article
Fraunhofer IWS ()
CO2-Laser; energetic efficiency; fiber laser; laser beam cutting; remote cutting

The remote cutting technique provides an enormous potential in terms of cutting speeds when working on thin sheets. Even on contour cutting speeds about 100 mmin are realizable. Working without any cutting gas, the material of the cutting kerf must be vaporized partially. It is evident that the energy input must be higher than for pure melting of the cutting kerf's material. In order to characterize laser cutting processes in terms of energetic efficiency, the severance energy can be used. This parameter depends on the necessary laser power to cut a defined sheet thickness at a certain cutting speed. Hitherto, it was used to compare different laser cutting processes using different laser beam sources when cutting straight lines. In order to characterize different processes for cutting real contours, the geometry of the part to be cut is also important. The complexity of a part can be characterized by the agility. The target of this paper is to combine the severance energy and the agility in order to compare the remote cutting and the conventional fusion cutting energetically. It will be shown where remote cutting can be applied very efficiently to produce parts in a flexible and highly productive way and what the application area of conventional fusion cutting with fast axis is.