Experimental, numerical and analytical investigations were performed to give a possible explanation of the differences in cutting quality detected for inert gas laser beam cutting process performed with disk and CO2 laser sources. Cutting experiments were carried out at maximum cutting speed on cold work steel test specimens with different sheet thicknesses. The particular feature of the applied experimental setup was the similar geometry of both the CO2 and the disk laser beam with comparable values of the focus diameter and the Rayleigh length. The thermodynamic analysis was based on experimentally primary losses evaluation by means of polymethylmethacrylate (PMMA) blocks, on numerical computation of conductive power losses and analytical calculation of the remaining terms of energy balance. Energy balance allowed the evaluation of secondary losses and proportion of vaporized kerf volume used for justifying the lower quality of disk laser cuts. The lower proportion of vaporized kerf volume detected for disk laser cuts results in an increased process temperature, thus an increase of viscosity of molten material and the subsequent more difficult ejection of the melted material from the cut kerf.

Energy balance in disk and CO2 laser beam inert gas fusion cutting / Daniele Scintilla, Leonardo; Tricarico, Luigi; Wetzig, Andreas; Beyer, Eckhard. - STAMPA. - 8239:(2012). (Intervento presentato al convegno Conference on High Power Laser Materials Processing - Lasers, Beam Delivery, Diagnostics, and Applications tenutosi a San Francisco, CA nel January 24-26, 2012) [10.1117/12.909941].

Energy balance in disk and CO2 laser beam inert gas fusion cutting

Luigi Tricarico
Writing – Review & Editing
;
2012-01-01

Abstract

Experimental, numerical and analytical investigations were performed to give a possible explanation of the differences in cutting quality detected for inert gas laser beam cutting process performed with disk and CO2 laser sources. Cutting experiments were carried out at maximum cutting speed on cold work steel test specimens with different sheet thicknesses. The particular feature of the applied experimental setup was the similar geometry of both the CO2 and the disk laser beam with comparable values of the focus diameter and the Rayleigh length. The thermodynamic analysis was based on experimentally primary losses evaluation by means of polymethylmethacrylate (PMMA) blocks, on numerical computation of conductive power losses and analytical calculation of the remaining terms of energy balance. Energy balance allowed the evaluation of secondary losses and proportion of vaporized kerf volume used for justifying the lower quality of disk laser cuts. The lower proportion of vaporized kerf volume detected for disk laser cuts results in an increased process temperature, thus an increase of viscosity of molten material and the subsequent more difficult ejection of the melted material from the cut kerf.
2012
Conference on High Power Laser Materials Processing - Lasers, Beam Delivery, Diagnostics, and Applications
978-0-8194-8882-4
Energy balance in disk and CO2 laser beam inert gas fusion cutting / Daniele Scintilla, Leonardo; Tricarico, Luigi; Wetzig, Andreas; Beyer, Eckhard. - STAMPA. - 8239:(2012). (Intervento presentato al convegno Conference on High Power Laser Materials Processing - Lasers, Beam Delivery, Diagnostics, and Applications tenutosi a San Francisco, CA nel January 24-26, 2012) [10.1117/12.909941].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/52602
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