铝合金可变双脉冲MIG焊接工艺  

Study on varying double pulse MIG welding for aluminum alloys

作　　者：樊丁[1] 朱明[2] 卢立晖[2] 黄健康[2] 樊佳伟[2] 石玗[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试验室,甘肃兰州730050 [2]兰州理工大学甘肃省有色金属新材料重点试验室,甘肃兰州730050

出　　处：《电焊机》2010年第12期76-79,共4页Electric Welding Machine

基　　金：国家自然科学基金资助项目(50675093)

摘　　要：针对恒规范铝合金焊接时,随着母材热输入的增加,母材热积累效应会不断增强,焊缝熔宽会随之变宽甚至出现焊塌的问题,采用基于xPC Target的实时目标环境,设计了铝合金可变双脉冲MIG焊试验平台,并进行了铝合金可变双脉冲MIG焊接工艺方面的试验研究。试验结果表明:当双脉冲中的低能脉冲在每个周期中所占的比例从0%不断增加到80%时,通过降低每个周期的平均电流而减少的母材热输入,可以补偿母材增强的热积累效应,从而有效地控制焊缝熔宽。焊缝成形美观,焊接效果良好。Aiming at the problem of weld pool width becoming wider even collapse owing to the heat accumulation of base metal by using constant parameters in ＇aluminum alloy MIG welding,an experimental platform for aluminum alloy varying double pulsed MIG welding was established by using real-time target environment based on xPC Target.Then experimental research on ＂aluminum alloy varying double pulsed MIG welding was carried out.The results show that the method of using varyin~ double pu^se to reduce the beat input in aluminum .alloy MIG welding can control the weld width effectively while the percentage of low-energy was increased from 0% to 80%, besides the perfect weld appearance and good welding joints also can be obtained.

关 键 词：铝合金 可变双脉冲MIG焊 熔宽 

分 类 号：TG44[金属学及工艺—焊接]