Numerical Simulation and Experimental Validation of the Temperature Field Generated During Pulsed Laser Processing of Notches for Fracture Splitting of an Engine Crankcase Main Bearing Seat

摘要

Based on the new field of research on fracture splitting process of an engine crankcase main bearing seat, pulsed laser processing of notches for fracture splitting of an engine crankcase main bearing seat was studied. A three-dimensional (3-D) finite element analysis (FEA) model of the transient temperature field was built for the process and the heat source model used in the simulation was Rotary-Gauss body heat source. The influence of laser parameters and processing parameters on the morphology of the notch was analysed and contrast experiments were carried out with a Nd:YAG pulsed laser under the condition of corresponding parameters to validate the FEA model. These showed that the proposal for the parameters selection of the pulsed laser processing of notches for fracture splitting of engine crankcase main bearing seats was sound.