| 超快变换高频变极性方波TIG电弧行为 |
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| 引用本文： | 从保强,齐铂金,周兴国. 超快变换高频变极性方波TIG电弧行为[J]. 焊接学报, 2009, 30(6): 87-90 |
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| 作者姓名： | 从保强 齐铂金 周兴国 |
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| 作者单位： | 北京航空航天大学,机械工程及自动化学院,北京,100191;北京航空航天大学,机械工程及自动化学院,北京,100191;北京航空航天大学,机械工程及自动化学院,北京,100191 |
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| 摘 要： | 基于一种新型电路变换拓扑实现频率达超音频段且具有超快速电流上升沿和下降沿变化速率的高频变极性方波电流输出,将其用于铝合金TIG焊接过程,研究分析高频变极性TIG电弧行为.结果表明,变极性电流频率和变化速率具有对电弧形态、稳定性及电弧力的控制能力,提高电流极性变换频率,电弧清除氧化膜的能力增强,电弧表现出明显的收缩效应,电弧电压和电弧等效电阻增大,但电弧偏吹作用加剧.在一定频率范围内,增加变极性电流频率,减小负极性电流幅值及其持续时间,可增大焊缝熔透率,有利于提高焊接效率和质量.
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| 关 键 词： | 超快变换 超音频 变极性 电弧行为 收缩效应 |
| 收稿时间： | 2008-04-28 |
TIG arc behavior of ultrafast-convert high-frequency variable-polarity square wave |
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| CONG Baoqiang,QI Bojin and ZHOU Xingguo. TIG arc behavior of ultrafast-convert high-frequency variable-polarity square wave[J]. Transactions of The China Welding Institution, 2009, 30(6): 87-90 |
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| Authors: | CONG Baoqiang QI Bojin ZHOU Xingguo |
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| Affiliation: | School of Mechanical Engineering and Automation;Beijing University of Aeronautics and Astronautics;Beijing 100191;China |
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| Abstract: | Based on a novel main circuit topology of ultrafast-convert power supply,variable polarity current with the ultrafast current rate of rise and fall was achieved,and the arc behavior of high-frequency variable-polarity tungsten inert-gas welding for aluminum alloy was investigated.The experimental results show that with the increase of current frequency,the cleaning action of ultrafast-convert high-frequency variable-polarity arc for surface oxide is significantly enhanced,arc plasma has an obvious pinch eff... |
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| Keywords: | ultrafast convert ultrasonic variable polarity arc behavior pinch effect |
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