阳极温度分布对耦合电弧AA-TIG高速焊焊缝成形的影响  

Effect of distribution of anode temperature on weld appearance in arc coupled AA-TIG high speed welding

作　　者：黄勇[1,2] 瞿怀宇[2] 王新鑫[2] 樊丁[1,2] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料国家重点实验室,兰州730050 [2]兰州理工大学有色金属材料先进加工成形技术教育部重点实验室,兰州730050

出　　处：《焊接学报》2013年第9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(51074084);甘肃省自然科学基金资助项目(1010RJZA037)

摘　　要：针对耦合AA-TIG电弧采用热电偶法测量了阳极温度分布.在垂直于主钨极和辅助钨极连线方向上,随着距连线的距离增大,耦合AA-TIG电弧的阳极温度逐渐降低,在主钨极位置处的温度最高,辅助钨极位置处次之,钨极中心点位置处最低.在主钨极和辅助钨极连线方向上,随着钨极间距增大,耦合AA-TIG电弧中心区域温度逐渐降低,外围区域温度逐渐增高,由单峰分布向双峰分布过渡.当钨极间距较大时,耦合AA-TIG电弧热源在主钨极和辅助钨极连线方向上被拉长,有利于消除高速焊时的咬边和驼峰焊道等缺陷.The distribution of anode temperature during arc coupled AA-TIG welding was measured with the thermocouple method. In the vertical direction of connection line between the main and aided tungsten electrodes,the temperature gradually descended outward from the connection line. The maximum temperature appeared in the main electrode,and the minimum temperature occurred at the center between two electrodes. In the direction of the connection line of two electrodes,with the increase of the distance between two electrodes,the temperature in the central region of the coupled arc gradually decreased,while that in the outer region increased. The distribution of temperature transferred from single-peak mode to double-peak mode. When the distance between the main electrode and aided electrode was large,the arc heat source in the direction of connection line between two electrodes was stretched,which would help to eliminate undercut and humping defects during high speed welding.

关 键 词：耦合电弧AA-TIG焊 阳极温度分布 热电偶法 高速焊 

分 类 号：TG403[金属学及工艺—焊接]