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 An Official Journal of the American Society of Thermal and Fluids Engineers High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
DOI: 10.1615/HighTempMatProc.v4.i2.30
12 pages Conductive Losses Experienced during CO2 Laser Cutting
J. Powell
Laser Expertise Ltd., Harrimans Lane, Dunkirk, Nottingham NG7 2TR, UK; and Division of Materials Processing, Lulea University of Technology, SE-97187 Lulea, Sweden
A. Ivarson
Lulea University of Technology, SE-971 87 Lulea; and Atlas Copco Rock Drills AB, SE-701 91 Orebro, Sweden
L. Ohlsson
Lulea University of Technology, SE-971 87 Lulea, Sweden
C. Magnusson
Division of Materials Processing, Lulea University of Technology, SE-97187Lulea, Sweden ABSTRACTThis paper begins by describing laser cutting in terms of a single energy balance. Analysis of this energy balance reveals that the efficiency of laser cutting decreases as the material thickness is increased. This point is demonstrated by the following experimental programme which investigates thermal losses by conduction from the cut zone. It is also shown that the magnitude of these conductive losses can exceed the laser output power if a laser-oxygen jet is used to cut steels. |