LASER CUTTING OF WIRE-WOUND RESISTORS - THEORY AND EXPERIMENTS

The present study discusses cw CO2-laser cutting of wire-wound resisto rs. Based on the three-dimensional mathematical model developed, we co mputed the evolution of the temperature field in the sample and the ph ase change, as functions of the laser beam power and processing speed. The temperature dependence of the thermophysical coefficients and the dependence of light-absorption coefficient on the laser beam angle on incidence are taken into account. Experimental results are presented for the minimum laser power that provides cutting of the sample at dif ferent speeds. A reasonable agreement between the experimental and the oretical results is found. (C) 1996 American Institute of Physics.