GMAW焊接熔滴长大和脱离动态过程的数学分析  

DYNAMIC ANALYSIS OF DROPLET GROWTH AND DETACHMENT IN GMAW

作　　者：武传松[1] 陈茂爱[1] 李士凯[1] 

机构地区：[1]山东大学材料连接技术研究所,济南250061

出　　处：《机械工程学报》2006年第2期76-81,共6页Journal of Mechanical Engineering

基　　金：山东省自然科学基金(Y2002F24)高等学校博士学科点专项科研基金(20010422001)资助项目

摘　　要：考虑GMAW焊接过程中熔滴过渡的主要特点,利用“质量-弹簧”理论建立了熔滴过渡的数学模型,对连续电流条件下GMAW焊接熔滴过渡过程进行了动态力学分析。定量分析了熔滴过渡形式、振荡速度等对熔滴过渡行为的影响,预测出了不同焊接电流条件下的熔滴脱离尺寸和过渡频率。结果表明,在同一焊接电流条件下, 上一个熔滴的脱离会影响到下一个熔滴在焊丝末端的振荡,并影响熔滴的尺寸和过渡周期:熔滴尺寸和过渡频率的理论计算值与试验数据基本吻合。Considering the main characteristics of metal transfer in GMAW, a mathematical model for metal transfer is developed based on the ＂mass-spring＂ theory. Dynamic analysis of metal transfer in GMAW process is conducted. The effects of transfer mode and oscillation velocity on metal transfer behaviors arc quantitatively analyzed. The detached droplet size and transfer frequency are predicted under different levels of welding current. It is found that under the condition of the same welding current the detachment of a molten droplet has a marked effect on the oscillation of successive droplet at the end of wire, the droplet size and transfer frequency. The predicted droplet size and transfer frequency are in agreement with the experimental results.

关 键 词：GMAW焊接 熔滴过渡 力学分析 

分 类 号：TG156[金属学及工艺—热处理]