METHOD OF LASER ENGRAVING OF METALS OR ALLOYS Russian patent published in 2013 - IPC B23K26/38 B41M5/24 

FIELD: process engineering.

SUBSTANCE: invention relates to metal or alloy laser engraving and may be used in various branches of machine building, medicine, etc. First, laser radiation power sufficient for structural alteration of metal or alloy surface sections. Plotted is calibration curve of metal or alloy fraction sprayed by laser radiation at definite power level trapped by fluid, in fact, translucent for laser beam and dependent upon depth of engraved metal or alloy surface in fluid. Then metal to be cut is dipped in fluid to depth defined by said calibration curve. Laser beam is spatially swept over metal or alloy surface in, at least, one coordinate. Said laser beam is translated and, at a tone, rotated with radius R. Said radius and angular rotation speed ω are defined from relationship: R=d/2-r, mcm and 2πR·ω>V, m/s, where: D is width of laser beam cutting width, mcm; r is laser beam radius, mcm; V is translation speed, m/s.

EFFECT: higher quality, no harmful effects to environments.

9 cl, 3 dwg, 1 ex