旋转陶瓷片约束TIG电弧形态分析  

TIG arc constricted by rotating ceramic plates

作　　者：朱亮[1] 张仁军[1] 田玉吉[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州730050

出　　处：《焊接学报》2007年第11期1-4,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50775105);兰州理工大学博士基金资助项目(SB01200702)

摘　　要：收缩电弧是提高TIG电弧的能量密度的有效途径。提出一种新的约束TIG电弧方法,用两片平行旋转的陶瓷片,对电极附近的电弧进行约束。通过电弧形态的观察分析,以及焊缝形状的测量,试验研究了不同旋转陶瓷片约束条件下电弧的形态和加热特性。结果表明,旋转陶瓷片可以有效地对TIG电弧进行非轴对称约束。在垂直于陶瓷片旋转平面的方向上,电弧中心的载流区域稳定收缩。两陶瓷片之间距离的减小,电弧进入陶瓷片深度的增加,都会使电弧中心载流区的宽度减小,从而使焊缝的熔深增加。同时发现,随电弧受约束程度的增加,电弧电压略有上升。Arc constriction is an effective approach to enhance the heat intensity of TIG(tungsten inert-gas) arc. A novel approach to constrict the TIG arc was presented. By means of double ceramic plates with parallel rotation, the arc near the electrode was constricted. Through observation of the arc shapes and measurement of the welds cross-sections, the arc shapes and its heat characteristics have been investigated at a variety of constriction conditions given by the rotating ceramic plates. The results show that the axially asymmetrical constriction of TIG arc was made by rotating ceramic plates. In the direction perpendicular to the rotating plane of ceramic plates, the central current carried column of the arc was constricted stably. Decrease of the distance between two ceramic plates, and increase of the depth for the arc entering into the ceramic plate gap gave rise to the further constriction of the central current carried column of the arc, and in turn increase the penetration of welds. Furthermore, the arc voltage was increase slightly when the constriction extent became stronger.

关 键 词：约束电弧 旋转陶瓷片 电弧形态 

分 类 号：TG444.74[金属学及工艺—焊接]