An Engineering Model To Simulate the Thermal Response of Electronic Devices During Pulsed Nd: YAG Laser Welding

摘要

A model is developed to predict the thermal response of 'real' electronic devices during pulsed Nd: YGA laser weld-ing. Modeling laser-apart interaction requiress ncorporation f weld pool hydrodynamics. and laser-metal vapor and laser-surface interaction. Although important information can be obtained from these models, they are not appropriate for use in design of actural components due to computational linitations. In lieu of solving for these detailed physics, a simple model is constructed. In this model, laser-part interactions are accounted for through an empirically determined energy transfer efficiency which is developed through the use of modelin and experients. This engineering model is appropriate since the thermal response of termperature sensitive components away fromthe weld pool is the primary interest here. Reasonable agreement between predictions and experiemntal measurements for welding of real components are indicated.