摘要
采用高速摄影的方法清晰、完整地观测了激光深熔焊接GG17玻璃时的小孔 ,并根据观测到的小孔的形状和尺寸 ,计算比较了小孔孔壁的反射吸收以及由于热传导和对流所引起的热损失 ,分析了小孔形成时平衡表面张力的主要作用力 ,建立了基于小孔孔壁前沿能量平衡的自适应模型 。
A technique of laser welding glass GG17 was developed to get clear photographs of the keyhole for quantitative study. The geometrical characteristics of the keyholes were experimentally investigated. 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 was proposed. The major force that balances the surface tension was discussed.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2004年第5期121-124,128,共5页
Transactions of The China Welding Institution
关键词
激光焊接
小孔
反射吸收
自适应调节
Absorption
Carbon dioxide lasers
Glass
Optical systems
Reflection
Surface tension
