Affiliation:
1. Dept. of Mechanical Engineering, University of California, Berkeley, CA
Abstract
This paper presents an analytical description of the evaporative and fusion laser cutting process. The model incorporates the effects of heat conduction, phase change, beam divergence, surface absorption and plasma absorption (for fusion cutting of metals) to estimate the geometry of the cutting front for given process parameters, material properties and workpiece geometry. Model estimates for kerf shape were developed for continuous-wave CO2 laser cutting of polymethyl-methacrylate (PMMA), aluminum oxide and 304 stainless steel. Comparison of model estimates with experimental results showed good agreement for cutting front geometries for PMMA, good kerf width agreement for aluminum oxide and model underestimation of kerf profile for 304 stainless steel. Results for the comparison of predicted and measured profile and centerline angles of inclination are also presented.
Subject
Industrial and Manufacturing Engineering,Computer Science Applications,Mechanical Engineering,Control and Systems Engineering
Reference23 articles.
1. Bang
S.
, RoyS., and ModestM., 1993, “CW Laser Machining of Hard Ceramics—II. Effects of Multiple Reflections,” Int. J. Heat Mass Transfer, Vol. 36, No. 14, pp. 3529–3540.
2. Beyer, E., and Petring, D., 1990, “State of the Art in Laser Cutting with CO2 Lasers,” Proc. ICALEO ’90, Nov. 4–9, Boston, MA, pp. 199–212.
3. Biyikli
S.
, and ModestM., 1988, “Beam Expansion and Focusing Effects on Evaporative Laser Cutting,” ASME Journal of Heat Transfer, Vol. 110, No. 2, May, pp. 529–532.
4. Bunting, K. A., and Cornfield, G., 1975, “Toward a General Theory of Cutting: A Relationship Between the Incident Power Density and the Cut Speed,” ASME Journal of Heat Transfer, Feb., pp. 116–122.
5. Cambel, A. B., 1963, Plasma Physics and Magnetofluid-Mechanics, McGraw-Hill, NY, pp. 115–119, 169–174, 190–191.
Cited by
24 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献