Visualization of events inside kerfs during laser cutting of fusible metal
- 1 February 2009
- journal article
- Published by Laser Institute of America in Journal of Laser Applications
- Vol. 21 (1), 39-45
- https://doi.org/10.2351/1.3071497
Abstract
The subject of the research is mechanism of melt removal and striated roughness generation. Being the main obstacle limiting laser cutting process performance, these phenomena are widely discussed. Available theoretical descriptions are not conclusive, as they have nothing to be verified with. High temperatures and narrowness of the kerf severely limit visual access at a real facility. Observation will become possible if one wall of the kerf is made of glass. This possibility is utilized in present experiments, which reproduce the process at low temperatures. Rose’s alloy (melting at 96 °C) is cut by reduced power laser beam (below 300 W) and high-speed photographic recordings are done. The experiments are carried out for thick materials (10 and 20 mm) under cut. Examination of the video data brought out innovative views on the melt removal. The cutting front was noted to be upright. The striation structure was observed to be generated at a certain distance from the cutting front and without direct assistance of laser radiation. Adequacy of the model experiment to the real case was confirmed by direct comparison of surfaces and by analysis of similarity relations.Keywords
This publication has 11 references indexed in Scilit:
- Determination of the lower complexity limit for laser cut quality modellingModelling and Simulation in Materials Science and Engineering, 2004
- Boundary element method for resonances in dielectric microcavitiesJournal of Optics A: Pure and Applied Optics, 2002
- Flow structures around an inclined substrate subjected to a supersonic impinging jet in laser cuttingOptics & Laser Technology, 2002
- Gas Dynamic Effects on Laser Cut QualityJournal of Manufacturing Processes, 2001
- Adjoint problems of mechanics of continuous media in gas‐laser cutting of metalsJournal of Applied Mechanics and Technical Physics, 2001
- Striation formation and melt removal in the laser cutting processJournal of Manufacturing Systems, 1999
- Dynamics of ripple formation and melt flow in laser beam cuttingJournal of Physics D: Applied Physics, 1999
- Dynamic characteristics of gas jets from subsonic and supersonic nozzles for high pressure gas laser cuttingOptics & Laser Technology, 1998
- A new technique to characterize and predict laser cut striationsInternational Journal of Machine Tools and Manufacture, 1995
- A three-dimensional analysis of gas entrainment operating during the laser-cutting processJournal of Physics D: Applied Physics, 1995