激光切割：辅助气体影响的综述

Laser Cutting: A Review on the Influence of Assist Gas.

作者信息

Riveiro Antonio, Quintero Félix, Boutinguiza Mohamed, Val Jesús Del, Comesaña Rafael, Lusquiños Fernando, Pou Juan

机构信息

Department of Applied Physics, University of Vigo, EEI, Lagoas-Marcosende 9. Vigo 36310, Spain.

Department of Materials Engineering, Applied Mechanics and Construction, University of Vigo, EEI, Lagoas-Marcosende, Vigo 36310, Spain.

出版信息

Materials (Basel). 2019 Jan 6;12(1):157. doi: 10.3390/ma12010157.

DOI:10.3390/ma12010157

PMID:30621346

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6337310/

Abstract

Assist gas plays a central role in laser fusion cutting. In this work, the aerodynamic interactions between the assist gas and the workpiece are reviewed. An insight into those phenomena that hinder the cutting quality and performance is provided. These phenomena include shock waves, choking, boundary layer separation, etc. The most relevant and promising attempts to overcome these common problems related to the gas dynamics are surveyed. The review of the current scientific literature has revealed some gaps in the current knowledge of the role of the assist gas dynamics in laser cutting. The assist gas interactions have been investigated only under static conditions; and the dynamic interaction with the molten material on the cutting front has not been addressed. New nozzle designs with improved efficiency of molten material removal are required to improve cut quality; and cutting speed in current industrial laser cutting machines; especially in those assisted by new high-brightness laser sources.

摘要

辅助气体在激光熔合切割中起着核心作用。在这项工作中，对辅助气体与工件之间的空气动力学相互作用进行了综述。深入了解了那些影响切割质量和性能的现象。这些现象包括冲击波、阻塞、边界层分离等。对克服这些与气体动力学相关的常见问题的最相关且有前景的尝试进行了调查。对当前科学文献的综述揭示了目前在辅助气体动力学在激光切割中作用的认识方面存在一些空白。辅助气体相互作用仅在静态条件下进行了研究；并且尚未涉及与切割前沿熔融材料的动态相互作用。需要新的喷嘴设计来提高熔融材料去除效率，以改善切割质量；以及提高当前工业激光切割机的切割速度；特别是那些由新型高亮度激光源辅助的切割机。