Component Temperature Versus Laser-Welding Parameters

摘要

Applications have arisen in which the component temperature near a laser weld is critical because of possible damage to the explosive powder adjacent to the member being welded. To evaluate the thermal excursion experienced at the powder cavity wall, a study was conducted using assemblies that had been equipped with 0.05 mm diameter thermocouple wires. The main goal of the study was to determine how changes in the laser welding parameters would affect the powder cavity wall temperature. The objective lens-to-work distance, pulse rate, and beam power parameters were varied. The peak temperature varied from 117 exp 0 C to 311 exp 0 C in response to welding parameter changes. The study concluded that by utilizing a selected set of welding parameters, the design requirement of a 160 exp 0 C maximum powder cavity wall temperature could easily be satisfied. (ERA citation 08:057497)