强弱脉冲比率对AA6061铝合金双脉冲焊焊缝质量影响分析

发布时间：2018-02-25 22:18

本文关键词： 强弱脉冲焊接稳定性双脉冲焊缝质量　出处：《焊接学报》2015年12期 　论文类型：期刊论文

【摘要】：针对AA6061铝合金材料双脉冲熔化极气体保护焊,研究了强弱脉冲个数比率的影响.利用小波分析仪采集焊接电参数,分析了电流波形图、U-I图、电流电压概率密度分布图,并且进行了显微维氏硬度测量.结果表明,不同强弱脉冲个数比率形成的焊缝是比较均匀的,但随着比率的增大,成形效果变差,焊缝上有明显的飞溅颗粒;余高与强弱脉冲个数比率成反比,熔宽与之成正比;随着强弱脉冲个数比率的增加,焊接的稳定性较好,但有下降的趋势;不同的强弱脉冲个数比率下得到的焊缝硬度差别不大且分布较均匀.
[Abstract]:In this paper, the influence of the ratio of strong and weak pulse number on AA6061 aluminum alloy material by double pulse gas arc welding is studied. The welding electric parameters are collected by wavelet analyzer, and the current waveform diagram and current voltage probability density distribution diagram are analyzed. The results show that the weld formed by different ratio of strong and weak pulses is uniform, but with the increase of the ratio, the forming effect becomes worse, and there are obvious spatter particles on the weld. The residual height is inversely proportional to the ratio of the number of strong and weak pulses and the melting width is proportional to the ratio of strong and weak pulses, and the welding stability is better with the increase of the ratio of strong and weak pulses, but there is a tendency to decrease. The hardness of the weld is not different and the distribution is more uniform under the different ratio of the number of strong and weak pulses.
【作者单位】：龙岩学院机电工程学院;华南理工大学机械与汽车工程学院;
【基金】：广东省省部产学研资助项目(2013B090600098) 龙岩市先进机械设计制造技术公共服务平台(2012LY01) 龙岩市科技计划资助项目(2014LY61)
【分类号】：TG441.7

【参考文献】