研究目的
To gain further insights into the striation formation process on cut edges during fiber laser fusion cutting of AISI 304 stainless steel sheets.
研究成果
The focal plane position is the most decisive factor affecting cut edge roughness, kerf geometry, and cutting speed. The study revealed strong correlations between experimental roughness values and the numerically computed rear-directed shear stress component, supporting the hypothesis that the characteristics of the boundary layer zone of the cutting gas flow affect the structure and roughness of cut edges.
研究不足
The conclusions are restricted to the defined parameter space of the study.
1：Experimental Design and Method Selection:
A factorial Design-of-Experiment (DoE) approach was used with laser power, focal plane position, gas pressure, nozzle stand-off, and nozzle diameter as control factors.
2：Sample Selection and Data Sources:
AISI 304 stainless steel sheets of 10 mm thickness were used.
3：List of Experimental Equipment and Materials:
A 4 kW multi-mode fibre laser, nitrogen gas, and various nozzle diameters and stand-off distances.
4：Experimental Procedures and Operational Workflow:
Cutting trials were performed with different parameter constellations, and responses such as cutting speed, kerf geometry, and edge roughness were analyzed.
5：Data Analysis Methods:
The data was analyzed to identify significant factors affecting the responses, and numerical simulations of the cutting gas flow were conducted.
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