焊接电流波形对波控短路过渡过程及焊缝形状尺寸的影响  

Effect of Welding Current Waveforms on Metal Transfer and Weld Geometry in Controlled Short Circuiting Transfer GMAW

作　　者：陈茂爱[1] 蒋元宁[1] 武传松[1] 

机构地区：[1]f山东大学材料液固结构演变与加工教育部重点实验室,济南250061

出　　处：《机械工程学报》2014年第4期85-91,共7页Journal of Mechanical Engineering

基　　金：山东省自然科学基金资助项目(ZR2010EZ005)

摘　　要：利用电参数与熔滴过渡图像同步检测系统研究波控短路过渡CO2焊峰值燃弧电流Iap、基值燃弧电流Iab以及拖尾时间tw(由峰值燃弧电流切换到基值燃弧电流所用的时间)等电流波形参数对过渡过程和焊缝成形尺寸的影响。结果表明,燃弧时间随着峰值燃弧电流和拖尾时间的增大而增大;短路时间随着峰值燃弧电流的增大而缩短,不随拖尾时间的变化而变化。基值燃弧电流对短路时间和燃弧时间的影响不大。平均燃弧电流随着峰值燃弧电流的增大而减小,随着基值燃弧电流和尾拖时间的增大而增大。随着峰值燃弧电流的增大,熔宽增大,余高减小;而熔深则先减小后增大。基值燃弧电流和拖尾时间的增大均会使熔深和熔宽增大,余高减小。The effect of waveform parameters of welding current （peak arcing current, basic arcing current and tail-out time, etc.） on metal transfer stability and weld geometry is investigated with a computer-based simultaneously sensing and visualizing system for images of droplet/wire and the transient data of welding current and arc voltage. The results shows that the arcing time increases and the short circuit time decreases with increasing the preset peak arcing current or tail-out time. The background arcing current has little effect on the arcing time and short circuit time. The mean arcing current decreases with increasing the peak arcing current and increases with increasing the background arcing current or tail-out time. With increasing the peak arcing current, the weld width increase, while the reinforcement decrease and the penetration first decreases then increases. An increase in background arcing current or tail-out time causes increases in weld wide and penetration and a decrease in reinforcement.

关 键 词：波控短路过渡 焊缝形状尺寸 电流波形 

分 类 号：TG115[金属学及工艺—物理冶金]