COMPARING LASER TRANSMISSION PRINCIPLES

摘要

In this paper simulation results of the simultaneous-, contour- and quasi-simultaneous laser welding processes will be presented. The calculations of this paper were performed by using a finite element analysis to understand the influence of the welding parameters: scanning velocity, frequency of scans, pressure and laser power. It will be shown how the process parameters affect the temperature distribution in the joining area. The FEA-model includes the heating phase and cooling phase and uses temperature dependent material data. Absorption in the transparent part and the convective cooling and emissivity at the surface of the weld interface were considered.