基于电弧电压概率密度铝合金脉冲MIG焊稳定性分析  

Evaluation method of pulsed MIG welding of aluminum alloy based on probability density of arc voltage signal

作　　者：石玗[1] 聂晶[2] 黄健康[2] 卢立晖[2] 樊丁[1] 

机构地区：[1]兰州理工大学有色金属合金及加工教育部重点实验室,兰州730050 [2]兰州理工大学甘肃省有色金属新材料重点实验室,兰州730050

出　　处：《焊接学报》2010年第5期13-16,113,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50675093);甘肃省自然科学基金资助项目(3ZS062-B25-028);兰州理工大学优秀青年教师培养计划资助项目(Q200901)

摘　　要：针对铝合金脉冲MIG焊过程稳定性评估问题,提出了基于电弧电压信号概率密度的分析方法.利用焊接过程电弧电压信号概率密度分布中的第一个峰值与第二个峰值的比值作为评价铝合金脉冲MIG焊过程稳定性的指标,通过对80组焊接试验中的电弧电压信号进行概率密度计算得到每一组概率密度分布中两个峰值的比值以此建立铝合金脉冲MIG焊过程稳定性评价体系.电压概率密度分布中两个峰值的比值越小,焊接过程越稳定;反之越不稳定.According to the assessment on stability of alu-minum alloy pulsed MIG welding,the analytical method was pro-posed based on the probability density of arc voltage signal.The ratio of first peak value and second peak value in voltage signal probability density distribution was taken as the criterion to as-sess the stability of pulsed MIG welding of aluminum alloy.The arc voltage signal probability density was calculated for 80 groups test and the ratio of two peak values in each group probability density distribution was obtained.Then a stability evaluation sys-tem for pulsed MIG welding of aluminum alloy was established.The result shows that the ratio is smaller,the stability is better,vice versa.

关 键 词：铝合金 脉冲MIG焊 电弧电压 概率密度 稳定性 

分 类 号：TG431[金属学及工艺—焊接]