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Influence of the Interaction of Focused Laser Beam and Gas-Powder Stream on the Quality of Laser Processing

机译：聚焦激光束与气粉流相互作用对激光加工质量的影响

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摘要

Laser processing technologies like alloying, cladding and rapid prototyping that are based on blowing of gas-powder mixture in the zone of laser processing are very dependent on the alignment of caustic surface (conventional surface that surrounds laser beam) and gas-powder mixture regarding the workpiece surface. Deep knowledge of its behavior is very important for the technologies that use coaxial introduction of gas-powder mixture into the processing zone.By means of numerical modeling with further experimental verification it was found that the shape of the gas-powder stream and its cross-section could be varied with help of the nozzles of various inner shapes. Further investigation of laser cladding technology by means of experiment planning techniques showed statistically significant influence of the position of caustic surface, and gas-powder mixture and the workpiece on the productivity (the size) and quality (presence of cavities) of the clad.
机译：激光处理技术，例如合金化，熔覆和快速成型，是基于在激光处理区域中吹送气粉混合物而产生的，这在很大程度上取决于腐蚀性表面（围绕激光束的常规表面）和气粉混合物的对准。工件表面。对气体行为的深入了解对于将煤粉混合物同轴引入加工区的技术非常重要。通过数值建模和进一步的实验验证，发现了煤粉流的形状及其交叉可以借助各种内部形状的喷嘴来改变截面。通过实验计划技术对激光熔覆技术的进一步研究表明，苛性表面，气体粉末混合物和工件的位置对熔覆的生产率（尺寸）和质量（存在空腔）具有统计学上的显着影响。

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