| 摘要: |
| 采用TIG-MIG复合焊电弧改善传统单一TIG及MIG焊的不足.基于PID闭环控制,实现恒流恒压外特性输出,从而实现TIG-MIG电弧复合.研究了复合电弧的电弧特性、熔滴过渡形式及不同极性接法对焊缝的影响.结果表明,TIG焊电弧对MIG焊电弧具有良好的维弧作用.TIG-MIG焊电弧复合熔滴过渡过程,TIG焊电弧稳定燃烧,为了保持最小的能量消耗而作用于熔滴上,对熔滴具有加热作用.直流反接具有良好的阴极雾化清理作用.TIG-MIG焊电弧复合能够有效降低焊接飞溅,促进焊缝铺展及成形,实现高效化、优质化的焊接. |
| 关键词: 电弧复合 熔滴过渡 焊缝成形 高效化焊接 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(50974046;50904020) |
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| Analysis of mechanism for TIG-MIG hybrid arc properties |
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YANG Tao1, ZHANG Shenghu1, GAO Hongming1, WU Lin1, XU Kewang2, LIU Yongzhen2
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1.State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;2.Offshore Oil Engineering Co. Ltd, Tianjin 300451, China
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| Abstract: |
| TIG-MIG hybrid arc is adopted to change deficiencies existing in TIG or MIG welding method.With PID theory, current and voltage of welding power is constantly controlled to achieve TIG and MIG hybrid arc.Thus, property of hybrid arc, transitional form of droplet and influence of different polarity connections to welding seam are studied.Results from above research show that presence of TIG arc made good effect for stability of MIG arc.In the hybrid welding, following minimum voltage rule, TIG arc burns on droplet to heat metal and DCEP has good effect in cleaning oxide film of workpiece.In conclusion, TIG-MIG hybrid arc efficiently reduce welding splash, promote wetting of droplets and formation of welding seam, and realize welding with higher efficiency and better quality. |
| Key words: hybrid arc droplet transfer weld formation high-efficiency welding |
