Laser turning with ultrashort laser pulses

  • We report on a comprehensive micromachining study of rotationally symmetric parts using femtosecond laser. A laser turning process with tangential impingement of the laser radiation complemented by a trepanning optics is implemented as to accomplish a true laser lathe micromachining approach. With the objective of optimized ablation rate and reduced surface roughness, the influence of pulse energy, feed rate, trepanning diameter and angular beam incidence, respectively, is investigated for processing stellite rods. We find the smallest feasible feature sizes of 8.5 μm in diameter and smoothest surfaces with an arithmetic average of the roughness profile as low as 0.18 μm. The surface roughness, however, appears to be limited by the occurrence of laser induced periodic surface structures provoked by the femtosecond laser radiation. Furthermore, the variation of the fluence in accordance to the incidence on a curved surface is discussed and the heat input into the material is examined through a longitudinal cross section.

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Metadaten
Author:Julian Zettl, Maximilian Klar, Stefan RungORCiD, Cemal Esen, Ralf HellmannORCiD
DOI:https://doi.org/10.1016/j.jmapro.2021.06.025
Parent Title (English):Journal of Manufacturing Processes
Document Type:Article
Language:English
Year of Completion:2021
Release Date:2021/09/20
Tag:Ablation rate; Tangential processing; Trepanning optic; Turning; Ultrashort laser pulses
GND Keyword:Ultrakurzer Lichtimpuls; Laserbearbeitung; Mikrobearbeitung; Femtosekundenlaser
Volume:2021
Issue:68
First Page:1562
Last Page:1568
Urheberrecht:0
research focus :Intelligent Systems / Intelligent Sensors and Signals
Materials / Innovative Material Processing
Materials / Material Testing & Sensor Technology
Licence (German):Keine Lizenz - es gilt das deutsche Urheberrecht
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