| CHARACTERISTICS OF DROPLET TRANSFER IN CO_2 LASER-MIG HYBRID WELDING WITH SHORTCIRCUITING MODE |
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| 作者姓名： | LEI Zhenglong CHEN Yanbin LI Liqun WU Lin State Key Laboratory of Advanced Welding Production Technology Harbin Institute of Technology Harbin China |
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| 作者单位： | LEI Zhenglong CHEN Yanbin LI Liqun WU Lin State Key Laboratory of Advanced Welding Production Technology，Harbin Institute of Technology，Harbin 150001，China |
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| 摘 要： | LF6 aluminum alloy plates with 4.5 mm thickness are welded in this experiment.Welding is carried out by using the CO2 laser-MIG paraxial hybrid welding in flat position. The experimental results indicate that the inherent droplet transfer cycle time of conventional MIG arc is changed due to the interaction between CO2 laser beam and MIG arc in the short-circuiting mode of laser-MIG hybrid welding. Because of the preheating action of CO2 laser to electrode and base material, the droplet transfer frequency of MIG arc is increased in the hybrid welding process. When laser power is increased to a certain degree, the droplet transfer frequency is decreased due to the effect of laser-induced keyhole. Furthermore, through analyzing the MIG welding current and arc voltage waveforms and the characteristics of droplet transfer in the hybrid welding process, the effect of laser energy and the action point between laser beam and arc on the frequency of droplet transfer and weld appearance is investigated in details.
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| 关 键 词： | MIG焊接 激光焊接 铝合金 溶滴过渡 焊接电流 |
CHARACTERISTICS OF DROPLET TRANSFER IN CO2 LASER-MIG HYBRID WELDING WITH SHORT-CIRCUITING MODE |
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| LEI Zhenglong CHEN Yanbin LI Liqun WU Lin State Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin ,China.CHARACTERISTICS OF DROPLET TRANSFER IN CO_2 LASER-MIG HYBRID WELDING WITH SHORTCIRCUITING MODE[J].Chinese Journal of Mechanical Engineering,2006,19(2):172-175. |
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| Authors: | LEI Zhenglong CHEN Yanbin LI Liqun WU Lin |
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| Affiliation: | State Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin 150001, China |
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| Abstract: | LF6 aluminum alloy plates with 4.5 mm thickness are welded in this experiment.Welding is carried out by using the CO2 laser-MIG paraxial hybrid welding in flat position. The experimental results indicate that the inherent droplet transfer cycle time of conventional MIG arc is changed due to the interaction between CO2 laser beam and MIG arc in the short-circuiting mode of laser-MIG hybrid welding. Because of the preheating action of CO2 laser to electrode and base material, the droplet transfer frequency of MIG arc is increased in the hybrid welding process. When laser power is increased to a certain degree, the droplet transfer frequency is decreased due to the effect of laser-induced keyhole. Furthermore, through analyzing the MIG welding current and arc voltage waveforms and the characteristics of droplet transfer in the hybrid welding process, the effect of laser energy and the action point between laser beam and arc on the frequency of droplet transfer and weld appearance is investigated in details. |
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| Keywords: | Laser-MIG hybrid welding Aluminum alloy Droplet transfer Weld appearance Welding current and voltage |
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