激光-MIG复合焊熔透状态视觉检测方法的研究  

Study on the method of vision detection on penetration status in Laser-MIG hybrid welding

作　　者：双元卿[1] 单际国[1] 陈武柱[1] 张永强[2] 

机构地区：[1]清华大学机械工程系,北京100084 [2]首钢技术研究院,北京100041

出　　处：《电焊机》2008年第12期45-49,共5页Electric Welding Machine

基　　金：国家自然科学基金资助项目(50175061)

摘　　要：激光-MIG复合对接焊中,熔透状态是反映焊缝成形质量的重要指标。为获得反映熔透状态的信息,在此采用视觉传感器对焊接过程中的熔池正面、小孔图像、熔池背面分别进行了检测。结果表明,在复合对接焊条件下,采用熔池正面图像检测或小孔热辐射图像检测的方法,不能判断出熔透状态。采用主动照明的拍摄方式并选用合适滤光片的熔池背面图像的视觉检测方法,能够获得反映焊缝熔透状态的图像。Penetration status is an important criterion to evaluate the weld quality of laser-MIG hybrid welding in gapped butt welding.In order to acquire the information of penetration status ,vision sensors have been applied to detect the topside image of molten pool, image of keyhole and the backside image of molten pool in hybrid welding respectively.The results show that penetration status can＇t be identified by the methods of detecting the topside image of molten pool and image of keyhole with vision sensors in gapped butt hybrid welding.The backside image of molten pool recognizing the weld penetration status has been acquired by the vision detection method of applying an external illumination source and an appropriated filter.

关 键 词：激光-MIG复合焊 熔透状态 视觉检测 熔池背面 

分 类 号：TG456.9[金属学及工艺—焊接]