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.
Author: | Julian Zettl, Maximilian Klar, Stefan RungORCiD, Cemal Esen, Ralf HellmannORCiD |
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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 |