Research on laser-driven metal transfer of 2219 aluminum alloy in GMAW
-
摘要: 以2219铝合金为研究对象，搭建了激光驱动GMAW熔滴过渡试验系统，采用高速摄像系统拍摄熔滴过渡行为，分析了激光的加入对熔滴过渡行为的影响. 结果表明，通过改变工艺参数，激光的加入改变了熔滴的受力状态从而改变了熔滴过渡模式和飞行轨迹. 脉冲激光作用在熔滴缩颈处形成的蒸发反力可以有效促进熔滴过渡，得到“一脉一滴”的射滴过渡形式，提高熔滴过渡频率和熔滴过渡的稳定性，同时能够有效改善焊缝成形解决铝合金焊接射滴过渡工艺区间窄，对母材热输入高以及焊接过程稳定性差等问题.Abstract: Taking the 2219 aluminum alloy as the research object, a laser-driven GMAW metal transfer test system is built. High speed camera system is used to capture the metal transfer process and the effect of the addition of laser on the droplet transfer behavior is analyzed. The results demonstrate that by changing the process parameters, the addition of a laser changes the force state of the droplet, which in turn changes the droplet transfer mode and the flight trajectory. When the pulsed laser irradiates the neck of the droplet, the resulting recoil force can effectively promote the detachment of the droplet from the welding wire and the desirable one drop per pulse transfer is obtained. Better weld formation is obtained because the transfer process is more stable. The process can not only improve stability of the metal transfer, effectively improve the weld formation, but also appropriately solve the problems of narrow welding process transfer range of the aluminum alloy welding, high heat input to the base metal and poor stability of the welding process.
-
Keywords:
- laser-driven /
- aluminum alloy welding /
- metal transfer /
- high-speed camera
-
-
[1] Chang Yunlong, Liu Xiaolong, Lu Lin, et al. Research status and prospect of short-circuiting CO2 gas-shielded arc welding[J]. Welding Technology, 2013, 3: 1 − 5
[2] 常云龙, 刘晓龙, 路 林, 等. 短路过渡CO2焊研究现状及展望[J]. 焊接技术, 2013, 3: 1 − 5 [3] Tomoyuki Ueyama. Development of low heat input and spatter reduction CO2/MAG alternating current welding system by controlled bridge transfer process[J]. Electric Welding Machine, 2009, 39(9): 10 − 13
[4] 上山智之. 通过CBT方法开发低热输入低飞溅CO2/MAG交流焊接系统[J]. 电焊机, 2009, 39(9): 10 − 13 [5] 王 军. 磁场控制高效MAG焊接旋转射流过渡稳定性的研究[D]. 北京: 北京工业大学, 2003. [6] Wei Huiliang, Li Huan, Wang Xuyou, et al. Hybrid interaction of laser and pulsed MIG arc and its influence on metal transfer[J]. Transactions of the China Welding Institution, 2011, 32(11): 41 − 44
[7] Liu Liming, Huang Ruisheng, Cao Yunming. Behavior analysis of low power YAG laser-gas metal arc welding hybrid welding arc plasma[J]. Chinese Journal of Lasers, 2009, 36(12): 3167 − 3173
[8] 范阳阳. 超声-GMAW复合焊接方法及其熔滴过渡行为研究[D]. 哈尔滨: 哈尔滨工业大学, 2012. [9] 韦辉亮, 李 桓, 王旭友, 等. 激光-MIG电弧的复合作用及对熔滴过渡的影响[J]. 焊接学报, 2011, 32(11): 41 − 44 [10] 刘黎明, 黄瑞生, 曹运明. 低功率YAG激光-熔化极气体弧焊复合焊接电弧等离子体行为研究[J]. 中国激光, 2009, 36(12): 3167 − 3173 [11] 肖 珺. 基于脉冲激光与电弧力调控的GMAW熔滴过渡主动控制[D]. 哈尔滨: 哈尔滨工业大学, 2014. [12] Chen X, Wang H X. A calculation model for the evaporation recoil pressure in laser material processing[J]. Journal of Physics: Applied Physics, 2001, 34: 2637 − 2642.
计量
- 文章访问数: 166
- HTML全文浏览量: 3
- PDF下载量: 9
下载:
