Product Code: ICA10_301

Numerical Investigation of the Effect of the Pulse Format on Drilling Performance
Authors:
Joonghan Shin, Center for Lasers and Plasmas for Advanced Manufacturing University of Michigan; Ann Arbor MI USA
Jyoti Mazumder, Center for Lasers and Plasmas for Advanced Manufacturing University of Michigan; Ann Arbor MI
Presented at ICALEO 2010

Numerical simulation for pulsed laser drilling is carried out to develop the fundamental understanding of the high power density laser process. The model used in this study adopted mathematical scheme called the level-set technique to capture the transient liquid-vapour interface during the laser-material interaction. The model has the capabilities of simulating major laser-material interaction physics such as heat transfer, vaporization, fluid flow and multiple reflections. Cooling and solidification phenomenon between successive laser pulses were also modeled to simulate the pulsed laser process. This study presents the influence of different pulse formats on drilling performance indicated by drilling speed, hole geometry and recast layer thickness.