铝合金AC-P-MIG焊接电弧行为及熔滴过渡过程

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (07): 1092-1096.

铝合金AC-P-MIG焊接电弧行为及熔滴过渡过程

袁磊a,b,华学明a,b,张旺a,b ,李芳a,b,吴毅雄a,b,c

（上海交通大学 a. 材料科学与工程学院焊接工程技术研究所；b. 上海市激光制造与材料改性重点实验室； c. 金属基复合材料国家重点实验室，上海 200240）

收稿日期:2011-10-11 出版日期:2012-07-30 发布日期:2012-07-30

Arc Behavior and Droplet Transfer Analysis in AC-P-MIG Welding of Aluminum Alloys

YUAN Lei-a, b , HUA Xue-Ming-a, b , ZHANG Wang-a, b , LI Fang-a, b , WU Yi-Xiong-a, b , c

(a.Welding Engineering Institute of Material Science and Engineering; b.Shanghai Key Laboratory of Materials Laser Processing and Modification; c. State key Laboratory of Metal Matrix Composites，Shanghai Jiaotong University, Shanghai 200240, China)

Received:2011-10-11 Online:2012-07-30 Published:2012-07-30

摘要/Abstract

摘要： 为了研究交流脉冲熔化极气体保护焊（ACPMIG）焊接过程中电弧形态特征及熔滴过渡控制，采用基于LabView的数据采集系统与高速摄像拍摄系统对焊接过程中电信号、电弧形态及熔滴过渡过程进行同步采集与拍摄.研究过程显示，焊丝为负极性（EN）阶段时电弧左右摆动并“上爬”越过熔滴而包裹焊丝，从而加速焊丝的熔化；焊丝为正极性（EP）阶段时电弧形态为典型的“钟罩形”，在脉冲阶段亮度与面积达到最大.熔滴在EN阶段长大速度加快，并在脉冲下降沿发生熔滴过渡.研究结果显示，EN与EP极性的交替变化，有利于降低电弧等离子流力及电弧对熔池的作用，控制合适的EN比率可以得到较快的焊丝熔化速度与较浅的熔深；控制脉冲阶段电流和时间可以实现稳定的一脉一滴过渡方式.

关键词: 交流脉冲熔化极气体保护焊, 电流电压信号, 电弧形态, 熔滴过渡

Abstract: The variation in arc behavior, stability and control of droplet transfer in ACPMIG welding were studied by data acquisition system and high speed video photography system. The research reveals that the arc in EN polarity moves around the droplet and climbs up to the wire end, as a result of this behavior the wire melting rate increases, while in EP polarity the shape of arc is a typical “bell jar” and its size and brightness become the largest during the pulse stage. The droplet grows rapidly in EN stage and transfers in falling stage of EP. The alternative transformation between EN polarity and EP polarity is beneficial to the reduction in both plasma arc flow power and welding pool arc force. By controlling the EN ratio, a rapidly wire melting rate and shallow penetration appear; by controlling the pulse stage current and time, a stable one pulse one drop transfer process forms.

Key words: alternative current pulse metal inert gas(MIG) welding, electrical current and voltage, arc behavior, droplet transfer

中图分类号:

TG 444

袁磊a, b, 华学明a, b, 张旺a, b, 李芳a, b, 吴毅雄a, b, c. 铝合金AC-P-MIG焊接电弧行为及熔滴过渡过程[J]. 上海交通大学学报（自然版）, 2012, 46(07): 1092-1096.

YUAN Lei-a, b , HUA Xue-Ming-a, b , ZHANG Wang-a, b , LI Fang-a, b , WU Yi-Xiong-a, b , c . Arc Behavior and Droplet Transfer Analysis in AC-P-MIG Welding of Aluminum Alloys[J]. Journal of Shanghai Jiaotong University, 2012, 46(07): 1092-1096.

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