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Proceedings Paper

Increase of hole-drilling speed by using packs of laser pulses
Author(s): Sergey G. Gorny; A. M. Grigoriev; Vitaliy A. Lopota; Gleb A. Turichin
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Paper Abstract

For realization of the optimum mode of hole drilling the packs of laser pulses of high intensity were used, when average level of intensity of radiation is not too high, that reduces specific energy of destruction, and the peak intensity is reasonably great, that the pulse of pressure of effect at evaporation has completely deleted the liquid from the zone of processing. The high peak intensity of radiation permits in this case to place a target not in focus of a optical system, creating on its surface the image with the help of masks. It permits to receive in metal plates the holes of any section, to execute marking of surfaces and deep engraving of sample material with the help of laser. With the using of focused radiation the cutting of thin materials can be executed without a auxiliary gas. The condition of melt replacement is excess of power of recoil pressure above the power of viscous forces and forces of inertia. The decision of the hydrodynamic problem permits to evaluate the necessary parameters of laser radiation, frequency and longitude of packs of pulses which provide increases of process speed in several times. The conducted experiments confirm the indicated theoretical analysis of process of removing of the material under action of packs of pulses of laser radiation. The given process is realized in laser technological installations for holes drilling and marks of materials.

Paper Details

Date Published: 20 September 1999
PDF: 7 pages
Proc. SPIE 3822, Computer-Controlled Microshaping, (20 September 1999); doi: 10.1117/12.364226
Show Author Affiliations
Sergey G. Gorny, St. Petersburg State Technical Univ. (Russia)
A. M. Grigoriev, St. Petersburg State Technical Univ. (Russia)
Vitaliy A. Lopota, St. Petersburg State Technical Univ. (Russia)
Gleb A. Turichin, St. Petersburg State Technical Univ. (Russia)

Published in SPIE Proceedings Vol. 3822:
Computer-Controlled Microshaping
Vadim P. Veiko; Tamas Szoerenyi, Editor(s)

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