后中值波电流脉冲MIG焊工艺  

Pulsed MIG Welding Process of Backward Median Current Waveform

作　　者：朱强[1] 姚屏[2] 

机构地区：[1]广东交通职业技术学院电子与通信工程学院,广东广州510800 [2]广东技术师范学院机电学院,广东广州510635

出　　处：《广东技术师范学院学报》2016年第5期31-35,共5页Journal of Guangdong Polytechnic Normal University

基　　金：广东省自然科学基金(2015A030313663);广东省公益研究与能力建设项目(2015A010104010);广东省高等学校优秀青年教师培养计划项目(Yq2013106)资助

摘　　要：熔化极气体保护焊(GMAW)能适合多种金属的全方位焊接,焊接效率较高,具有广阔的应用领域.有规律的熔滴过渡对焊缝成形有重要的影响,后中值波电流脉冲焊接方法在峰值电流后增加一个中值脉冲电流,能有效控制熔滴过渡的过程.焊接电流工艺实验平台被搭建,分别在碳钢和铝合金材料商进行了多组后中值波电流焊接的实验,实验验证了后中值波是一种合适的焊接电流控制波形,焊接过程稳定,采集的实时电流与电压信号工整有规律,电弧声柔和,飞溅较少,焊缝成形良好.合适的后中值参数能在铝合金焊缝产生光亮、整齐的鱼鳞纹效果.Gas metal arc used to weld various metals in all positions. It has high efficiency and a broad range of applications. Regular droplet transfer mode has important effect for appearance of weld. Pulsed MIG welding of backward median current waveform is a peak pulse followed by a median pulse in a square wave pulse which is considered enhance droplet transfer controllability effectively. A welding process platform was built and a lot of welding experiments were carried out using carbon steel and aluminum alloy materials. The results show that backward median current is a proper welding control current waveform with stable welding process, real-time current and voltage signals neat and regular, the voice sound is soft with low splatter, weld seam surface is well. There are bright and regular ripples in aluminum alloy weld surface with proper backward median current parameters.

关 键 词：电流波形控制 中值波 熔滴过渡 铝合金焊接 

分 类 号：TG444[金属学及工艺—焊接]