| 摘要: |
| 介绍了一种新型MAG焊熔滴调控的方法,基于前期研究,首次将超声驻波场引入MAG焊. 在不同保护气体成分(CO2含量)条件下,探索研究超声对MAG焊熔滴过渡的影响. 结合高速摄像拍摄的电弧与熔滴图像,研究了电弧长度以及熔滴导电区域夹角变化,结果表明,低CO2含量条件下超声作用更加明显,但随着CO2含量增加,特别是超过20%时,短路过渡中超声对电弧压缩效果趋于恒定并最低. 滴状过渡中阻碍熔滴过渡的电磁力逐渐增强,最终也抵消了超声的促进作用. 显示出超声作用效果对CO2含量的选择性. 最后利用纯CO2保护的超声-MAG复合焊试验验证了试验的有效性. |
| 关键词: 超声-MAG焊接 CO2含量 电弧压缩率 导电区域夹角 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51275134) |
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| Effect of CO2 content for droplet transfer in ultrasound-MAG hybrid welding |
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FAN Chenglei1, XIE Weifeng1, YANG Chunli1, ZHUANG Xiaowei2, LIN Sanbao1
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1.State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;2.South Sichuan Machinery Factory, Aerospace Science and Technology Corporation, Luzhou 646000, China
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| Abstract: |
| Since the presence of CO2, the droplet control to MAG welding has always been a difficult problem. Based on preliminary studies, ultrasonic standing wave field, as a new method of droplet regulation, was introduced into MAG welding in this paper. In different conditions of shielding gas composition, the effect of ultrasound on droplet transfer was also studied. Under the conditions of low CO2 content, ultrasonic effect was still very significant. But with the increase of CO2 content, especially more than 20%, in short transition, the compression effect of ultrasound-arc tended to a constant and minimum. In droplet transition, this electromagnetic force gradually increased and eventually offset the downward ultrasound radiation force. Finally,the conclusions of the above analysis was verified by pure CO2 ultrasonic-MAG welding experiment. |
| Key words: ultrasound-MAG hybrid welding CO2 content arc compression ratio conductive region angle |
