NUMERICAL SIMULATION OF CUT KERF FORMATION UNDER THE INFLUENCE OF CO2 AND FIBER LASERS

摘要

Fiber laser cutting of metals is significantly differentfrom cutting with CO2 laser. The nature of thesedifferences is unknown. One possible reason isinstability of the metal melting front movement underthe action of radiation with different wavelengths.In this paper the influence of laser radiationwavelength on cut kerf depth and formation dynamicsis studied with a help of numerical simulation. Threedimensionalheat conduction problem with movingboundary is solved; absorption coefficient dependenceon the angle of incidence is taken into account to.