Research on Assist-Gas Dynamics and Nozzle Design for Laser Cutting

9400119达成协议，该奖项是为了提高对激光切割所用辅助气体动力学的了解，以吹走熔化材料和等离子体，以期提高性能。超音速微喷技术将转移到激光切割领域，通过保持整个切割边缘的超音速流动来提高切割速度和效率。增强了熔体的去除，并避免了材料在开缝中的再沉积。还将通过改进喷嘴设计来寻求对传统同轴辅助气体输送的重大改进。这项工作主要是试验性的，包括开发合适的喷嘴和微喷嘴，以及使用实际的商业激光设备进行切割试验。这项研究有望对气体动力学相关的基础知识库以及激光切割关键制造技术的效率产生影响。辅助气体动力学的改进有望直接转化为更快、更清洁的激光切割。更强大的激光现在变得可用，也将受益于这项研究预期的改善的辅助气体动力学。

9400119 Settles The award is for research to improve understanding of the dynamics of the assist gas used with laser cutting to blow away molten material and plasma, with a view to improving performance. The technology of supersonic microjets will be transferred to the field of laser cutting to improve cutting speed and efficiency by maintaining supersonic flow along the entire cutting edge of the kerf. Melt removal is enhanced and material redeposition in the kerf is avoided. Significant improvements in conventional coaxial assist-gas delivery will also be sought by improving nozzle design. The work is primarily experimental and involves development of appropriate nozzles and microjets, and cutting trials using actual commercial laser equipment. The research is expected to impact the fundamental knowledge base related to gas dynamics as well as the efficiency of the key manufacturing technology of laser cutting. Improvements in assist gas dynamics are expected to translate directly into faster, cleaner laser cuts. More powerful lasers now becoming available would also benefit from the improved assist gas dynamics expected as a result of this research.