To meet the precision requirement of aluminum MIG welding under magnetic field, the influences of process parameters on the geometry of bead and surface morphologies were studied and the reasonable match of process parameters was analyzed. The results show that the welding speed plays a decisive role to reinforcement and its contribution rate reaches up to 83.25%. The other factors' descending order of contribution rate for bead width is wire feed speed, welding speed, arc blowout correction, exciting current, frequency of magnetic field and arc length correction. With the increase of exciting current, the bead width increases and the depth decreases, and the surface morphologies quality is improved. But, the exciting current and arc correction have to match better. When these two parameters are all too large, the weld defects of incomplete fusion appear or the bead can not be formed.
Key words
machinofacture technique and equipment /
magnetic field /
aluminum alloy /
MIG welding
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
［1］ 刘志华,赵兵,赵青. 21世纪航天工业铝合金焊接工艺技术展望[J]. 导弹与航天运载技术, 2002,(5): 63-64.
LIU Zhi-hua, ZHAO Bing, ZHAO Qing. Prospects for welding technology of aluminum alloy in aerospace industry in 21st century[J]. Missiles and Space Vehicles, 2002,(5): 63-64. (in Chinese)
[2] 梁媛媛,朱胜. 再制造成形系统中的焊接路径规划[J].中国表面工程,2006,19(5):274-276.
LIANG Yuan-yuan, ZHU Sheng. Path planning for MIG surfacing of remanufacturing system[J]. China Surface Engineering, 2006, 19(5):274-276. (in Chinese)
[3] 国旭明,杨成刚. 磁搅拌对铝铜合金MIG焊缝形状、组织及性能影响[J]. 航空材料学报, 2007, 27(2):18-20.
GUO Xu-ming, YANG Cheng-gang. Effect of electromagnetic stirringon the shape, structure and mechanical properties of Al-Cu alloyMIG weld[J]. Journal of Aeronautical Materials, 2007, 27(2):18-20. (in Chinese)
[4] WangH, Jiang W, Ouyang J, et al. Rapid prototyping of 4043 Al-alloy parts by VP-GTAW[J]. Journal of Materials Processing Technology, 2004, 148: 93-102.
[5] 常云龙,李多,李大用,等. 纵向磁场作用下MIG焊熔滴过渡过程的分析[J]. 焊接学报, 2009, 30(3): 21-24.
CHANG Yun-long, LI Duo, LI Da-yong, et al. Analyses of process of MIG droplet transfer with longitudinal magnetic[J]. Transactions of the China Welding Institution, 2009, 30(3): 21-24. (in Chinese)
{{custom_fnGroup.title_en}}
Footnotes
{{custom_fn.content}}
