脉冲MIG焊工艺研究与优化控制  

Study on the optimization control of pulsed MIG welding

作　　者：林放[1,2] 崔龙彬[1] 魏仲华[1] 陈小峰[1] 高理文[1] 薛家祥[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640 [2]江门职业技术学院机电技术系,广东江门529000

出　　处：《电焊机》2011年第10期67-70,共4页Electric Welding Machine

基　　金：广国家自然科学基金资助项目(50875088);广东省科技攻关资助项目(2008B010400006);番禺区攻关资助项目(2010-Z-22-1);黄埔区攻关资助项目(1021)

摘　　要：研制了数字化脉冲MIG焊电源,研究其焊接工艺过程的优化控制。优化起弧方式,提高了起弧成功率,起弧点熔深效果良好;在电源输出端采用R-C滤波电路可以滤除电压中的高频干扰,达到降低弧压的目的;对熔滴过渡进行优化控制研究,对各种不同焊丝的一脉一滴临界电流曲线进行标定;采用变频控制方案对弧长进行有效控制,并引入先进先出(FIFO)的队列结构求弧压平均值;通过试验验证了采用上述优化控制方法,可以使得焊接过程稳定,焊缝成形良好。Based on the designed digital pulsed MIG welding power source, the optimized control of welding process was studied.The optimization not only guaranteed an easy and successful arc starting, but also provided better are starting penetration effect, comparing with normal arc starting method.Through experiments demonstration,the adopted R-C filter in the output terminal of the welding power source was proved to help eliminating the high-frequency interferences and decreasing the arc voltage.The optimum control of the droplet transfer was given, including the calibration of the One-Pulse-One-Droplet critical current curve for different wires.The proposed variable frequency arc length control and First Input First Output （FIFO） data structure were applied to calculate the average voltage.The result showed that stable welding and high-quality welding seams were achieved.

关 键 词：脉冲MIG焊 优化控制 R—C滤波 变频弧长控制 队列结构 

分 类 号：TG444.72[金属学及工艺—焊接]