中国焊接
中國銲接
중국한접
CHINA WELDING
2014年
4期
8-12
,共5页
张国凯%武传松%刘新锋%张晨
張國凱%武傳鬆%劉新鋒%張晨
장국개%무전송%류신봉%장신
keyhole%weld pool%plasma arc welding%single vision sensor%infrared sensing
The dynamic behaviors ofthe keyhole and weld pool are coupled together in plasma arc welding,and the geometric variations ofboth the keyhole and the weld pool determine the weld quality.It is ofgreat significance to simultaneously sense and monitor the keyhole and the weld pool behaviors by using a single low-cost vision sensor in plasma arc welding process.In this study,the keyhole and weld pool were observed and measured under different levels ofwelding current by using the near infrared sensing technology and the charge coupled device (CCD)sensing system.The shapes and relative position ofweld pool and keyhole under different conditions were compared and analyzed.The observation results lay solid foundation for controlling weld quality and understanding the underlying process mechanisms.
