REAL-TIME OPTICAL PYROMETRY IN LASER MACHINING

The opportunities for temperature measurement by a high-speed high-spa tial-resolution pyrometer system in a wide range of laser applications are illustrated by heat treatment, welding, cladding and alloying. Co ntinuous CO2 and pulsed Nd:YAG laser machining are considered. The inf luence of such factors as beam traverse speed, laser power (or pulse e nergy), slab thickness, melt drop expulsion and distance from the seam centre on temperature evolution is analysed. The experimental results are analysed by numerical simulation.