Geometry and absorptance of the cutting fronts during laser beam cutting
Source abstract
Abstract
The geometry of the cutting front and the cutting kerf was measured with an online high-speed x-ray diagnostic system. X-ray videos from fusion cutting of 10 mm thick stainless steel samples were recorded with a frame rate of 1000 Hz. A three-dimensional reconstruction of the time-averaged geometry of the cutting front and cutting kerf out of these images made it possible to apply ray-tracing for calculating the overall absorptance and the distribution of the absorbed irradiance at the cutting front. When increasing the feed rate, it was observed that the local inclination of the lower part of the cutting front with respect to the laser beam increased as well as the locally absorbed irradiance on the cutting front. This also leads to an increase in the overall absorptance with increasing feed rates.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Laser Material Processing Techniques · Welding Techniques and Residual Stresses · Additive Manufacturing Materials and Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institut fuer Strahlwerkzeuge (IFSW) 1 , Pfaffenwaldring 43, 70569 Stuttgart, Germany
Precitec GmbH & Co. KG 2 , Draisstraße 1, 76571 Gaggenau, Germany
References (17)
Show source-provided references
1. Optimization of parameters for fibre laser cutting of a 10 mm stainless steel plate10.1177/2041297510394078 ↗
2. Characterization of the melt flow direction and cut front geometry in oxygen cutting with a solid state laser10.2351/1.4983262 ↗
3. The mechanism of laser cutting10.22486/iwj.v25i2.148338 ↗
4. Influence of the real geometry of the laser cut front on the absorbed intensity and the gas flow10.1007/s40516-018-0077-z ↗
5. Advanced trim-cut technique to visualize melt flow dynamics inside laser cutting kerfs10.2351/1.4983261 ↗
6. Study of melt flow dynamics and influence on quality for CO2 laser fusion cutting10.1088/0022-3727/44/13/135501 ↗
7. Visualization of events inside kerfs during laser cutting of fusible metal10.2351/1.3071497 ↗
8. Experimental investigation of transient temperature characteristic in high power fiber laser cutting of a thick steel plate10.1016/j.optlastec.2016.05.005 ↗
9. Fibre laser cutting stainless steel: Fluid dynamics and cut front morphology10.1016/j.optlastec.2016.08.002 ↗
10. Experimental observation of hydrodynamics of melt layer and striation generation during laser cutting of steel10.1016/j.phpro.2011.03.070 ↗
11. Generation of striations during laser cutting of mild steel10.15764/APHY.2014.02010 ↗
12. Real-time observation of laser cutting fronts by x-ray transmission10.1016/j.jmatprotec.2016.05.029 ↗
13. Forecasting, structural time series models and the Kalman filter, Andrew C. Harvey Cambridge University Press, 1939 - Fore casting, structural time series models and the Kalman filter10.1017/S0266466600012822 ↗
14. In situ high speed diagnosis—A quantitative analysis of melt flow dynamics inside cutting kerfs during laser fusion cutting with 1μm wavelength10.2351/1.5096091 ↗
15. High-speed x-ray imaging system for the investigation of laser welding processes10.2351/1.5110595 ↗
16. Theoretical and experimental studies of ultra-short pulsed laser drilling of steel10.1117/12.2058936 ↗
17. 1995