CO_2激光焊接质量控制

Quality control of CO_2 laser welding

针对应用较为普遍的CO2激光焊接,介绍激光焊接的物理过程、光束模型及参数,总结分析小孔熔池的形成过程及数学模型影响因素对焊接过程稳定性的影响,利用光束数学模型分析模型各参数对焊接过程稳定性的影响。阐述等离子云产生的机理,总结等离子云对激光功率衰减的消除措施及实际生产中激光焊接缺陷的处置方法,保障焊接过程稳定,获得稳定熔深。

The physical process and beam model of CO2 laser welding are introduced. The forming process of welding pool and influencing factors of mathematical model are generalized. In order to guide the welding process design for the application of common CO2 laser welding,the influencing factors on the stability of laser welding pool are analyzed by welding beam model.Causes and eliminating methods of CO2 laser welding plasma cloud are reviewed. The solutions to abnormal welding phenomenon for CO2 laser welding are summarized.