Investigation into Development of Liquid Layer and Formation of Surface Plasma During CO2 Laser Cutting Process
- 1 November 1992
- journal article
- review article
- Published by SAGE Publications in Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
- Vol. 206 (4) , 287-298
- https://doi.org/10.1243/pime_proc_1992_206_085_02
Abstract
Interaction studies between the liquid metal and gas jet during laser cutting were made and relationships between the various parameters influencing the cutting action were identified theoretically. In the theoretical analysis, the effect of the jet on the process, due to jet momentum and the interface (gas-liquid) shear stress, were considered. On the experimental side, the work was carried out in two parts. In the first part, cutting of mild steel at the different thickness levels was carried out using an argon/oxygen gas mixture at 5/1 pressure ratio and 138 kPa total pressure. The depth of resolidification around the keyhole resulted from the cutting process and was examined microscopically. In the second part, the motion of plasma generated during the laser cutting process was monitored using a CCD (icharge coupled device) camera, fibre-optic probe and microlens camera. In this case oxygen was used as the assisting gas.Keywords
This publication has 3 references indexed in Scilit:
- Study into the Measurement and Prediction of Penetration Time during CO2 Laser Cutting ProcessProceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 1990
- The Examination of Optimal Focus Settings with Material Thickness at Atmospheric and Subatmospheric Pressures of Air and Oxygen in Laser Drilling of MetalsProceedings of the Institution of Mechanical Engineers, Part B: Management and engineering manufacture, 1988
- Effects of plasma on CO2 laser cutting qualityOptics and Lasers in Engineering, 1988