双弧脉冲惰性气体保护焊耦合电弧稳定性控制  

Coupling Arc Stability Control for Dual-Arc Pulsed MIG Welding

作　　者：卢立晖[1] 李凯强[1] 辛鹏 石玗[3] 樊丁[3] LU Lihui LI Kaiqiang XIN Peng SHI Yu FAN Ding(School of Engineering, Qufu Normal University, Rizhao 276826, Shandong, China Mengshan Relay Station, Shandong Provincial Bureau of Press and Publication, Linyi 273300, Shandong, China State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China)

机构地区：[1]曲阜师范大学工学院,山东日照276826 [2]山东省新闻出版广电局蒙山转播台,山东临沂273300 [3]兰州理工大学甘肃省有色金属新材料重点实验室,兰州730050

出　　处：《上海交通大学学报》2016年第12期1921-1924,共4页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金项目(51405262);曲阜师范大学科技计划项目(xkj201406)资助

摘　　要：针对双弧脉冲惰性气体保护焊(MIG)的特点和控制要求,提出了视觉反馈并控制主弧弧长来稳定整个耦合电弧的控制策略.在此基础上,搭建了基于xPC的双弧脉冲MIG焊实时控制系统,设计了主弧弧长视觉提取方案,并进行了基于视觉反馈的耦合电弧稳定性控制实验.结果表明,通过视觉传感并控制主弧弧长的稳定来保证整个耦合电弧稳定的控制策略是可行的,能够满足双弧脉冲MIG焊的控制要求,保证焊接过程的稳定进行,焊接效果良好.Dual-arc pulsed MIG welding is a novel low-energy input method. The heat input acting on basemetal and the arc force which is required by droplet transfer can be adjusted separately by the matching and controlling of pulse current waveforms of the main and bypass. The process of dual-arc pulsed MIG welding is unstable due to the poor self-adjusting ability of coupling arc. Aimed at this problem, a control scheme was proposed to stabilize the coupling arc by adjusting the main arc length obtained by vision sens- ing. Based on this, a real-time control system based on xPC for dual-arc pulsed MIG welding was established and an image processing method to obtain the main arc length was designed. Then, control experiments for coupling arc length stability were conducted based on visual feedback. The results show that the control scheme can meet the control requirements of dual-arc pulsed MIG welding, improve the stability of welding process, and achieve fine welding quality.

关 键 词：双弧脉冲惰性气体保护焊 低能量焊接 耦合电弧稳定性 视觉反馈 

分 类 号：TG409[金属学及工艺—焊接]