ժҪ Cable-type welding wire (CWW) CO2 welding is an innovative process arc welding with high quality, high efficiency and energy saving, in which CWW is used as consumable electrode. The CWW is composed of seven wires with a diameter of 1��2 mm. One is in the center, while others uniformly distribute around it. The diameter of twisted wire is up to 3��6 mm, which can increase the deposition rate significantly. With continual wire-feeding and melting of CWW, the formed rotating arc improved welding quality obviously. The arc behavior and droplet transfer were observed by the electrical signal waveforms and corresponding synchronous images, based on the high speed digital camera and electrical signal system. The results showed that the shape of welding arc changed from bell arc to beam arc with the increase of welding parameter. The droplet transfer mode changed from repelled transfer, globular transfer to projected transfer in turn. Droplet transfer frequency increased from 18��17 Hz to 119��05 Hz, while the droplet diameter decreased from 1��5 times to 0��3 times of the CWW diameter.
Abstract��Cable-type welding wire (CWW) CO2 welding is an innovative process arc welding with high quality, high efficiency and energy saving, in which CWW is used as consumable electrode. The CWW is composed of seven wires with a diameter of 1��2 mm. One is in the center, while others uniformly distribute around it. The diameter of twisted wire is up to 3��6 mm, which can increase the deposition rate significantly. With continual wire-feeding and melting of CWW, the formed rotating arc improved welding quality obviously. The arc behavior and droplet transfer were observed by the electrical signal waveforms and corresponding synchronous images, based on the high speed digital camera and electrical signal system. The results showed that the shape of welding arc changed from bell arc to beam arc with the increase of welding parameter. The droplet transfer mode changed from repelled transfer, globular transfer to projected transfer in turn. Droplet transfer frequency increased from 18��17 Hz to 119��05 Hz, while the droplet diameter decreased from 1��5 times to 0��3 times of the CWW diameter.
��������:Research on multi-arc rotating and coupling mechamism of GMAW with cable-type wire;Research of automatic seven-wire-rotating-arc EGW and regulation mechanism of weld-joint properties
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Fang Chenfu
E-mail: 13952846832@163.com
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Zhi-dong YANG,Chen-fu FANG,Yong CHEN,Guo-xiang XU,Qing-xian HU,Xiao-yan GU. Arc Behavior and Droplet Transfer of CWW CO2 Welding[J]. �й������ڿ���, 2016, 23(8): 808-814.
Zhi-dong YANG,Chen-fu FANG,Yong CHEN,Guo-xiang XU,Qing-xian HU,Xiao-yan GU. Arc Behavior and Droplet Transfer of CWW CO2 Welding. Chinese Journal of Iron and Steel, 2016, 23(8): 808-814.
2016, Vol. 23 
