Welding gun with excitation device

The invention provides a welding gun with an excitation device. The welding gun is provided with the excitation device arranged outside. The excitation device comprises an excitation body and a coil wound around the excitation body. After the excitation device is electrified, a magnetic field used for controlling arc swinging of the welding gun is generated. The excitation device is designed and installed outside under the condition that the integral size and welding performance of the welding gun are not influenced; and welding gun arc swinging control is achieved through the controllable square wave alternating magnetic field principle, the problems of arc deflection and edge staying in the welding process are greatly solved, operation is simple, and the welding gun conforms to the minimization tendency. 本发明提供了种具有励磁装置的焊枪，所述焊枪具有设置在外部的励磁装置，所述励磁装置包括励磁主体和绕设在励磁主体上的线圈，所述励磁装置通电后产生用以控制焊枪电弧摆动的磁场。本发明在不影响焊枪整体尺寸及焊接性能的条件下，在外部设计安装个励磁装置，采用可控的方波交变磁场原理实现了对焊枪电弧的摆动控制，极大改善了焊接过程中偏弧及边缘停留问题，操作简单且顺应小型化趋势。