大厚度铝合金变极性等离子弧穿孔立焊技术  

VARIABLE POLARITY PLASMA ARC WELDING PROCESS FOR THICK ALUMINUM ALLOY

作　　者：韩永全[1,2] 陈树君[1] 殷树言[1] 吕耀辉[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院 [2]内蒙古工业大学材料科学与工程学院 呼和浩特 010062

出　　处：《机械工程学报》2006年第9期144-148,共5页Journal of Mechanical Engineering

基　　金：北京市教委科技发展计划资助项目(KM200510005021)

摘　　要：研制以16位单片机为控制核心的双逆变型铝合金变极性等离子弧穿孔立焊专用设备,测试并分析变极性等离子电弧力学特性,对变极性等离子弧稳定性、电弧力和电弧能量的传递特征进行了深入的探讨。研究发现铝合金变极性等离子穿孔焊接中正极性电弧对力更具影响,而反极性电弧对热更具影响,实时保持穿孔熔池上热和力的平衡是厚板变极性等离子弧稳定穿孔焊接关键所在。用自行研制的设备成功实现了15 mm LD10铝合金变极性等离子弧穿孔立焊工艺,研究结果对于将变极性等离子弧焊接工艺应用到我国航空航天等领域具有重要的现实意义。A double invert variable polarity plasma arc（VPPA） power source based on 16-bit MCU which is used for aluminum alloys is introduced. The mechanics characteristics of VPPA are analyzed. The arc stability, arc energy, the transferring characteristics of the arc pressure and the reliability of VPPA power source as well have been researched. It is found that during the VPPA welding procedure of aluminum alloy, the arc of EN has more effect on force; the arc of EP has more effect on thermal, and to keep the balance of the force and thermal is the sticking point of VPPA. This power source is used to weld aluminum alloy with 15 mm thickness successfully. The conclusions will make sense to the application of the variable polarity plasma arc welding technique in the aerospace industry.

关 键 词：变极性等离子弧 电弧力 铝合金 

分 类 号：TG456.2[金属学及工艺—焊接]