VPTIG焊接电流参数对电弧形态及焊缝质量的影响  

Effects of VPTIG welding current parameters on arc shape and weld quality

作　　者：方臣富[1] 俞加俊[1] 陈树君[2] 宋永伦[2] 

机构地区：[1]江苏科技大学先进焊接技术省级重点实验室,江苏镇江212003 [2]北京工业大学机械与应用电子技术学院,北京100022

出　　处：《焊接学报》2007年第12期21-25,共5页Transactions of The China Welding Institution

基　　金：船舶行业国防预研基金资助项目(98.J56.2.2(1));江苏省高新技术研究项目(2142X1C033)

摘　　要：采用高速录像系统、记忆示波器同步实时采集变极性氩弧(VPTIG)焊接电流、电弧形态信息,比较分析了VPTIG焊接电流频率、直流电极接负(DCEN)时间和直流电极接正(DCEP)时间、DCEN及DCEP电流幅值5个参数对电弧形态及焊缝质量的影响。结果表明,通过调节以上5个参数,可以控制电弧形态、电弧力及焊接热输入,从而控制熔深及焊缝正反面成形;控制焊缝两侧清理区宽度;减少钨极烧损。采用平板对接低频脉冲调制铝合金VPTIG焊接工艺,单道焊熔深可达6 mm,焊缝成形良好、质量可靠。With high-speed video system and memory real-time oscilloscope gathering welding current and arc shape information of variable polarity TIG(VPTIG) welding,effects of five parameters including welding current frequency,DCEP(direct current electrode positive) and DCEN(direct current electrode negative) time,DCEP and DCEN current amplitude on arc shape information and quality of weld were analyzed.The experiment showed that arc shape,arc welding pieces of power and heat input can be controlled by regulating the five parameters,which not only could control penetration,both sides of weld and liquidation district width on both sides of weld,but also reduced the loss of tungsten electrode.VPTIG welding craft for aluminum alloy with plate docking and low frequency impulse modulation were adopted,and the depth of fusion of single pass welding could reach 6 mm.Meanwhile,good appearance of weld and reliable quality of welded joint could be obtained.

关 键 词：变极性氩弧焊 焊接电流 电弧形态 焊缝质量 

分 类 号：TG148[一般工业技术—材料科学与工程]