针对纵向磁场作用下的电弧难提取焊缝信息的问题,设计一种由 3个纵向分布磁感线圈组成的'山'形分布纵向磁场传感器.利用COMSOL软件模拟非对称纵向磁场作用电弧形态.取焊接过程电弧电压分布对应的磁感应强度作为焊缝识别试验的磁感应强度.用高速摄影仪拍摄非对称纵向磁场作用下的电弧运动轨迹,并与新型传感器设计的电弧运动轨迹进行比较,验证纵向磁场传感器产生非对称纵向磁场的电弧形态变化.结果表明,非对称纵向磁场能控制电弧进行焊缝识别,并能解决窄间隙焊接过程中的咬边和侧壁不融合.该方法为磁控焊缝跟踪传感器在窄间隙焊接的应用开辟了新的方向.

In the case of thick plate components, a large-groove multi-layer arc welding method is generally used. Because the plate thickness is large and the amount of welding consumables is large, the welded joints are easily deformed, and the welding technology is more difficult. It is not necessary to narrow the thick plates. The multi-wire submerged arc welding multilayer welding process is studied. In this regard, this article first describes the development status of the narrow groove welding technology, and then analyzes the application advantages of the narrow-groove submerged arc welding technology. Combined with examples, the multiwire submerged arc welding of thick plate narrow groove multi-layer Welding process points for detailed exploration.