CO_2激光拼焊熔透性实时监测  

Real-time monitoring of penetration in CO_2 laser welding

作　　者：朱琼玉[1] 王春明[1] 吴松坪[1] 胡伦骥[1] 胡席远[1] 

机构地区：[1]华中科技大学,湖北武汉430074

出　　处：《电焊机》2006年第7期56-60,共5页Electric Welding Machine

摘　　要：在利用统计分析工具对激光拼焊等离子体的可听声(Audible Sound)、UV(Ultraviolet Emission),熔池IR(Infrared Emission)的RMS均值进行统计分析的基础上,进一步对特征信号进行时域和频域分析。在此基础上提取的曲线能够很好地反映激光拼焊过程的状态变化。研究了焊接工艺参数和熔透状态发生改变时3路信号的变化规律,发现当改变激光功率时,紫外信号和声信号的变化规律最能反映熔透状态的改变;改变焊接速度时,紫外信号和红外信号的变化规律最能反映熔透状态的改变。With the statistic analysis software,it analyzes the time domain and frequency domain of characteristic signals.Based on it, the curve extracted can reflect the process of CO2 laser welding well.In the study of features of three signals with different welding technical parameters and penetration states,it is found that,when laser power is changed,the signals of ultraviolet emission and audible sound can correctly reflect penetration states.While welding speed is changed,the signals of ultraviolet emission and infrared emission can do this.

关 键 词：激光焊接 信号处理 质量检测 熔透状态 

分 类 号：TG456.7[金属学及工艺—焊接]