共 2 条
[1]
POWELL J, 1998, CO2 LASER CUTTING
[2]
*V S SCI, COMM LIT DUAL FOC LE
Laser cutting stainless steel with dual focus lenses
被引：8
作者：
Powell, J
Tan, WK
Maclennan, P
Rudd, D
Wykes, C
Engstrom, H
机构：
[1] Laser Expertise Ltd, Nottingham NG7 2TR, England
[2] Univ Nottingham, Div Mfg Engn & Operat Management, Nottingham NG7 2RD, England
[3] V&S Sci London Ltd, Potters Bar EN6 1BW, Herts, England
[4] Lulea Univ Technol, Div Mat Proc, SE-97187 Lulea, Sweden
关键词：
laser;
cutting;
dual focus lens;
focusing;
cut speed;
cut quality;
D O I：
10.2351/1.1324718
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this article the performance of a new type of lens is compared with traditional meniscus lenses for CO2 laser cutting of medium (>5 mm) section stainless steel. Dual Focus(TM) lenses produce two focus spots, one above the other. This type of optic was found to be capable of higher cutting speeds and better quality cuts. A phenomenological model is presented which explains the superior performance of Dual Focus lenses. The model concentrates upon the fact that during high speed cutting of medium section metals, the laser does not irradiate the lower portion of the cut zone. This lower part of the cut is heated by the melt flowing over it, which has been previously heated by the laser, This melt preheating involves narrower kerfs and higher cut speeds if a dual focus lens is used. (C) 2000 Laser Institute of America. [S1042-346X(00)00506-4].
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页码：224 / 231
页数：8
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