水下湿法药芯焊丝焊接气泡动态演变与其声脉冲分析  

Study on dynamic evolution and acoustic pulse of bubbles in underwater welding

作　　者：李志刚 祝林 黄卫 徐翔 叶建雄[2] LI Zhigang;ZHU Lin;HUANGWei;XU Xiang;YE Jianxiong(Key Laboratory of Vehicle Tools and Equipment,Ministry of Education,East China Jiaotong University,Nanchang,330013,China;Nanchang Institute of Technology,Nanchang,330099,China)

机构地区：[1]华东交通大学,载运工具与装备教育部重点实验室,南昌330013 [2]南昌工程学院,南昌330099

出　　处：《焊接学报》2021年第4期36-41,I0002,共7页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51665016)。

摘　　要：水下湿法药芯焊丝焊接(FCAW)以操作适用性好等优点在海洋设施维修中占有重要地位,焊接区域周围动态变化的气泡生长会影响焊接电弧的稳定性.文中通过搭建水下湿法焊接试验平台,进行了湿法药芯焊丝焊接试验,利用传感器对焊接过程中的电弧电流电压信号,气泡声信号以及气泡高速图像进行了同步采集;研究了气泡声信号与气泡高速图像的对照关系,并对气泡声信号与电弧电流电压信号进行同步分析,获得了不同电弧燃烧状态下的气泡演变行为,以气泡声信号的变化来反映气泡演变对水下湿法焊接电弧燃烧的稳定状态的影响.结果表明,气泡声信号可以清晰地反映焊接电弧燃烧的各种状态,能对不同气泡演变模式进行分类,并可从中分析其与电弧燃烧特性的对应关系.Underwater wet flux cored wire welding(FCAW)plays an important role in the maintenance of marine facilities due to its good operational applicability and other advantages.The dynamically changing bubble growth around the welding area will affect the stability of the welding arc.An underwater wet welding test platform was built and wet flux cored wire welding experiments was conducted.Sensors was used to synchronously collect the arc current and voltage signal,the bubble sound signal and the bubble high-speed image in the welding process The contrast relationship between the bubble acoustic signal and the high-speed bubble image was studied.The bubble acoustic signal and the arc current voltage signal were analyzed simultaneously.The evolution behavior of the bubble under different arc combustion conditions was obtained.The effect of bubble evolution on the steady state combustion of underwater wet welding arc was reflected from the change of bubble acoustic signal.The results show that the bubble acoustic signals can clearly reflect the various states of welding arc combustion,can classify different bubble evolution patterns,and analyze the corresponding relationship with arc combustion characteristics.

关 键 词：水下湿法焊接 气泡声信号 电弧特性 同步采集 

分 类 号：TG456.5[金属学及工艺—焊接]