A theoretical and experimental study on keyhole effects in laser deep penetration welding

被引：2

作者：

Li, LJ ^{[1
]}

Jin, XZ ^{[1
]}

Zhang, Y ^{[1
]}

机构：

[1] Hunan Univ, Laser Inst, Changsha 410082, Hunan, Peoples R China

来源：

LASERS IN MATERIAL PROCESSING AND MANUFACTURING | 2002年 / 4915卷

关键词：

laser welding; glass; keyhole; fresnel absorption; self-regullation;

D O I：

10.1117/12.482870

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A technique of laser welding glass GG17 (Pyrex) was developed to get clear photographs of the keyhole for quantitative study. The geometrical characteristics of the keyholes are experimentally examined. Based on the known keyhole geometry, the Fresnel absorption and the conduction and convection heat flux loss of the keyhole wall were calculated and compared. A concept of self-regulation of the front keyhole wall for getting energy balance is proposed. The major force that balances the surface tension is also discussed.

引用

页码：107 / 116

页数：10