Model of the final borehole geometry for helical laser drilling

2018 ◽  
Vol 7 (3) ◽  
pp. 183-188
Author(s):  
Alexander Kroschel ◽  
Andreas Michalowski ◽  
Thomas Graf
Keyword(s):  
Experimental Data ◽  
Stainless Steel ◽  
Cross Sections ◽  
Ablation Threshold ◽  
Laser Pulses ◽  
Laser Drilling ◽  
Ultrashort Laser Pulses ◽  
Threshold Fluence ◽  
Different Shapes ◽  
Ultrashort Laser

Abstract A model for predicting the borehole geometry for laser drilling is presented based on the calculation of a surface of constant absorbed fluence. It is applicable to helical drilling of through-holes with ultrashort laser pulses. The threshold fluence describing the borehole surface is fitted for best agreement with experimental data in the form of cross-sections of through-holes of different shapes and sizes in stainless steel samples. The fitted value is similar to ablation threshold fluence values reported for laser ablation models.

scholarly journals High-quality percussion drilling with ultrashort laser pulses

2021 ◽  
Vol 127 (9) ◽  
Author(s):  
A. Feuer ◽  
R. Weber ◽  
R. Feuer ◽  
D. Brinkmeier ◽  
T. Graf
Keyword(s):  
Stainless Steel ◽  
Laser Fluence ◽  
Ablation Threshold ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
High Quality ◽  
Edge Quality ◽  
Ultrashort Laser ◽  
Percussion Drilling

AbstractThe influence of the laser fluence on the quality of percussion-drilled holes was investigated both experimentally and by an analytical model. The study reveals that the edge quality of the drilled microholes depends on the laser fluence reaching the rear exit of the hole and changes with the number of pulses applied after breakthrough. The minimum fluence that must reach the hole’s exit in order to obtain high-quality microholes in stainless steel was experimentally found to be 2.8 times the ablation threshold.

Burst mode ablation of stainless steel with tunable ultrashort laser pulses

2021 ◽  
Vol 33 (2) ◽  
pp. 022005
Author(s):  
Peter Lickschat ◽  
Daniel Metzner ◽  
Steffen Weißmantel
Keyword(s):  
Stainless Steel ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Burst Mode ◽  
Ultrashort Laser

Determination of the Ion Temperature in a Stainless Steel Slab Exposed to Intense Ultrashort Laser Pulses

2012 ◽  
Vol 109 (2) ◽  
Author(s):  
E. Principi ◽  
R. Cucini ◽  
A. Filipponi ◽  
A. Gessini ◽  
F. Bencivenga ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Ion Temperature ◽  
Steel Slab ◽  
Ultrashort Laser

scholarly journals Ultrashort laser pulses: a comparison between a mathematical model and experimental data

2000 ◽  
Author(s):  
Roberto Ortega-Martinez ◽  
Carlos J. Roman-Moreno ◽  
Antonio A. Rodriguez-Rosales ◽  
Cesar A. Juarez-Melchor
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Ultrashort Laser

scholarly journals D-Scan measurement of ablation threshold incubation effects for ultrashort laser pulses

2012 ◽  
Vol 20 (4) ◽  
pp. 4114 ◽  
Author(s):  
Leandro Matiolli Machado ◽  
Ricardo Elgul Samad ◽  
Wagner de Rossi ◽  
Nilson Dias Vieira Junior
Keyword(s):  
Ablation Threshold ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Ultrashort Laser
Sign in / Sign up

Export Citation Format

Share Document