Analytical model for the depth progress of percussion drilling with ultrashort laser pulses
Daniel Holder, Rudolf Weber, Thomas Graf, Volkher Onuseit, David Brinkmeier, Daniel J. Förster, Anne Feuer
Abstract
Abstract A simplified analytical model is presented that predicts the depth progress during and the final hole depth obtained by laser percussion drilling in metals with ultrashort laser pulses. The model is based on the assumption that drilled microholes exhibit a conical shape and that the absorbed fluence linearly increases with the depth of the hole. The depth progress is calculated recursively based on the depth changes induced by the successive pulses. The experimental validation confirms the model and its assumptions for percussion drilling in stainless steel with picosecond pulses and different pulse energies.
Topics & Concepts
Laser drillingFluenceDrillingLaserPicosecondConical surfaceMaterials sciencePulse (music)OpticsUltrashort pulseUltrashort pulse laserMechanicsPhysicsComposite materialMetallurgyDetectorLaser Material Processing TechniquesAdvanced Surface Polishing TechniquesAdvanced machining processes and optimization