光纤激光焊接熔池和小孔的高速摄像与分析

采用主动光源和光学窄带滤光片等辅助器件,利用高速摄像技术对光纤激光焊接过程中的熔池和小孔进行了拍摄,获得了较为清晰的熔池和小孔图像,以及不同激光功率下光纤激光焊接熔池和小孔的实际尺寸,可以为光纤激光焊接熔池和小孔的模拟提供可靠的参考依据。对高速摄像图片和焊缝熔深波动以及焊缝形貌进行了分析。结果表明:小孔前沿附近是光纤激光焊接过程中飞溅产生的主要区域;利用高速摄像可以监测焊缝的熔深变化;熔池温度最低的区域为熔池后部的中轴线两侧,而非熔池边界处。

High-speed photograph and the analysis of the welding pool and keyhole in fiber laser welding

The high-speed photograph technology,including the illumination source and bandpass filter,was utilized to shoot the molten pool and keyhole in the process of fiber laser welding,some clear images of them were obtained.The actual sizes of the molten pool and keyhole in the process of the fiber laser welding with different laser power were got,and these would provide reliable reference foundation for the simulation of the weld pool and keyhole in the process of fiber laser welding.The images,weld penetration...