Characteristics of arc in variable polarity plasma arc welding of aluminum alloy  

作　　者：洪海涛 韩永全 杜茂华 吴永军 

机构地区：[1]College of Materials Science and Engineering, Inner Mongolia University of Technology, Huhhot, 010051.

出　　处：《China Welding》2014年第3期73-77,共5页中国焊接（英文版）

基　　金：This work was supported by the National Nature Science Foundation of China （ Grant No. 50764007）.

摘　　要：A double invert variable polarity plasma arc （VPPA） power source based on 16-bit MCU applied for aluminum alloys was developed. Mechanics, electrical and the produced heat mechanism of VPPAW arc were tested and analyzed. Results indicate that during the VPPA welding procedure of aluminum alloy, the arc of electrode negative （EN） has more effect on force, whereas the arc of electrode positive （ EP ） has more effect on heat. It should be noted that keeping the balance of the force and heat is the critical element of VPPAW. This power source had been successfully used to weld aluminum alloy with a 15 mm thickness in vertical welding. The conclusions are applicable to the variable polarity plasma arc welding technique used in the aerospace industry.A double invert variable polarity plasma arc （VPPA） power source based on 16-bit MCU applied for aluminum alloys was developed. Mechanics, electrical and the produced heat mechanism of VPPAW arc were tested and analyzed. Results indicate that during the VPPA welding procedure of aluminum alloy, the arc of electrode negative （EN） has more effect on force, whereas the arc of electrode positive （ EP ） has more effect on heat. It should be noted that keeping the balance of the force and heat is the critical element of VPPAW. This power source had been successfully used to weld aluminum alloy with a 15 mm thickness in vertical welding. The conclusions are applicable to the variable polarity plasma arc welding technique used in the aerospace industry.

关 键 词：variable polarity plasma arc arc pressure aluminum alloy 

分 类 号：TG439.5[金属学及工艺—焊接] TG146.21[一般工业技术—材料科学与工程]