窄坡口MAG焊摆动参数对焊缝成形的影响  

Effect of narrow groove MAG welding oscillation parameters on weld formation

作　　者：罗雨[1] 张中亮[1,2] 周灿丰[1,2] 杨成功[1] 周卫[1] 

机构地区：[1]北京石油化工学院能源工程先进连接技术研究中心,北京102617 [2]北京化工大学机电工程学院,北京100029

出　　处：《河北科技大学学报》2017年第1期7-12,共6页Journal of Hebei University of Science and Technology

基　　金：国家自然科学基金(51305037);北京市属高校创新团队建设提升计划项目(IDHT20130516);北京石油化工学院URT资助项目(2015J00083)

摘　　要：为了解决窄坡口侧壁熔合问题,改善焊缝成形,采用窄坡口高速摆动MAG焊枪,进行了不同摆动宽度和摆动频率的焊接试验。通过测量焊缝宏观金相获得焊缝截面尺寸,对焊缝截面尺寸随摆动宽度、摆动频率的变化趋势进行曲线拟合,研究了高速摆动电弧窄坡口MAG焊摆动参数对焊缝成形的影响规律。结果表明,增加摆动宽度和频率都能减小焊缝熔深,增加侧壁熔深,当焊枪摆动宽度使侧间距大于-0.5mm、小于1mm时会获得好的焊缝成形,摆动频率增加到5Hz以上时,能消除焊缝指状熔深,但是当摆动频率高于9Hz时,增加摆动频率,焊缝截面尺寸的变化不明显。获得的这些摆动参数对焊缝成形的影响规律能够为焊接工艺参数的选择提供指导。In order to solve the problem of narrow groove wall fusion, improving the weld formation, the welding test of differ-ent oscillation width and frequency is carried out by adopting the narrow high-speed swing MAG welding torch. On the basis of measuring the macro metallographic to determine the weld cross section size, the curve fitting of the variation trend of the weld section size with the swing width and the swing frequency is carried out. The effect of the high speed swing arc narrow groove welding MAG parameters on weld formation is studied. The results show that increasing the swing width or frequency can reduce the weld penetration and increase lateral wall penetration; when the swinging width makes side spacing greater than -0. 5 mm and less than 1 mm, good weld forming will be gained; when the oscillation frequency increases to more than 5 Hz, weld finger penetration can be eliminated, but when it is above 9 Hz, increasing the swing frequency cannot cause obvious change of the dimension of weld. The effects of these oscillating parameters on weld formation can provide guidance for the selection of welding parameters.

关 键 词：焊接工艺与设备 窄坡口 MAG焊枪 摆动宽度 摆动频率 焊缝成形 

分 类 号：TG444[金属学及工艺—焊接]