Abstract: The quantitative model for the continuous-wave laser cutting of metals without chemical reactions is presented. The cutting gas flow is investigated experimentally using a geometrically similar model. Gas pressure and velocity distribution over the cutting front have been measured. Simplified mathematical algorithms for the heat problem have been developed and the maximum depth and cutting speed have been calculated depending on the laser beam parameters. The possible nonstationarities in motion of the melt and the cutting front have been considered. A thermal mechanism for regular cut ripple formation is suggested. The mechanism involves a balance of the capillary forces and those caused by the gas flow and acting on the melt near the upper edge of a cutting front. The simple formulae have been obtained for the magnitude and period of the ripples. !12
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