Trepanning drilling of stainless steel using a high-power Ytterbium-doped fiber ultrafast laser: influence of pulse duration on hole geometry and processing quality

John Lopez; Mathieu Dijoux; Raphael Devillard; Marc Faucon; Rainer Kling

doi:10.1117/12.2039360

7 March 2014 Trepanning drilling of stainless steel using a high-power Ytterbium-doped fiber ultrafast laser: influence of pulse duration on hole geometry and processing quality

John Lopez, Mathieu Dijoux, Raphael Devillard, Marc Faucon, Rainer Kling

Author Affiliations +

Proceedings Volume 8972, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIV; 89721E (2014) https://doi.org/10.1117/12.2039360
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

Percussion drilling is a well-established technique for several applicative markets such as for aircraft and watch industries. Lamp pumped solid state lasers and more recently fiber lasers, operating in millisecond or nanosecond regimes, are classically used for these applications. However, due to their long pulse duration, these technologies are not suitable for emerging applicative market such as fuel injectors for automotive industry. Only the ultrashort laser technology, combined with special drilling optics like trepanning head, has the potential to fulfill the needs for this new market in terms of processing quality, custom-shape capabilities and short drilling time. Although numerous papers dealing with percussion drilling have been reported in the literature, only few papers are dedicated to trepanning drilling. In this context, we present some results on the influence of pulse duration on gas-assisted laser drilling of stainless steel using a trepanning head and a high power Ytterbium doped fiber ultrafast laser (20W). The influence of pulse energy (7- 64μJ), fluence (3-25 J/cm²), drilling time (1-20s), processing gas pressure and drilling strategy will be discussed as well.

Citation Download Citation

John Lopez, Mathieu Dijoux, Raphael Devillard, Marc Faucon, and Rainer Kling "Trepanning drilling of stainless steel using a high-power Ytterbium-doped fiber ultrafast laser: influence of pulse duration on hole geometry and processing quality", Proc. SPIE 8972, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIV, 89721E (7 March 2014); https://doi.org/10.1117/12.2039360

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