Документ взят из кэша поисковой машины. Адрес оригинального документа : http://nuclphys.sinp.msu.ru/school/s08/s08_29.pdf Дата изменения: Tue Nov 18 10:31:01 2008 Дата индексирования: Tue Oct 2 00:31:02 2012 Кодировка: Windows-1251

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E-mail: : Zavalov_Yuri@yahoo.com The paper presents the results of pyrometric on-line diagnostics application in gas-assisted laser cutting of sheets from steel 6 and 10 mm thick. The fluctuation spectra of brightness temperature have been measured in the through channel that is formed under laser radiation, depending on the depth of local position of the melt zone undergoing the diagnostics, the velocity of the sample motion relative to the focused laser beam, and the assisted gas (oxygen) pressure. It has been shown that the spectrum of T* fluctuations contains the information on nonstationarities of the melt front motion under laser radiation and it can be used in on-line diagnostics with the aim of improving the quality of gas-assisted laser cutting of metals and their alloys.

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1. Sforza P., Santecesaria V., "Analytical dependence of the roughness of the cut edge on the experimental parameters and process monitoring", Proceed. SPIE, v.2207, pp. 836-847 1994. 2. Sforza P., de Blasiis D., Lombardo V. "Three -module sensor for CO2-laser welding and cutting processes", Proceed. SPIE, v.3097, pp. 97-107 (1997). 3. Takashi Fushimi, Hideyuki Horisawa, Shigeru Yamaguchi et al., "A fundamental studying of laser cutting using a high speed photography" Proceed. SPIE, v.2888, pp. 90-95 (2000). 4. Antonov A.A., Grishaev R.V., Dubrov V.D., et al. "The application of optical pyrometers for investigation of gas-assisted laser cutting quality" Proceedings of ILLA / LTL '2006 International Conference & Symposium, October 4-7, 2006, Bulgaria , pp.419-426, ISSN13120638 (2007).