2219铝合金变极性TIG焊熔透状态识别方法

Recognition Method Research for Variable Polarity TIG Welding Penetration State of 2219 Aluminum Alloy

铝合金焊接熔透状态有效识别是其焊缝成形及接头质量表征的一个关键因素.设计了2219铝合金变极性TIG多元信息传感系统,实时获取焊接动态过程熔池宽度、送丝速度、焊接电流、间隙和错边等多元信息,并以此信息作为模型输入变量,构建了2219铝合金变极性TIG熔透状态预测模型,通过支持向量机建模对2219变极性TIG焊接熔透状态:未熔透、熔透和过熔透进行分类,支持向量机的核函数和惩罚因子通过网格搜索法寻优获得,模型分类准确率达93.294 1%.

Aluminum alloy welding penetration state effective recognition is the weld and the joint quality characterization of one of the key factors.Variable polarity TIG 2219 aluminum alloy was developed in this paper,multiple information sensing system,real-time dynamic process of welding pool width,wire feed speed,welding current,clearance and wrong side of multivariate information,and information as the model input variables,and build the 2219 aluminum alloy variable polarity TIG fusion state prediction model,through the support vector machine(SVM)modeling of variable polarity TIG welding penetration condition:2219not penetration,penetration and fusion classification,the kernel function of support vector machines(SVM)and punishment factor through grid search method optimization and model classification accuracy of 93.294 1%.