When this method is used for welding, the end of the welding rod is zigzagged and continuously swings and moves forward, and stops for a moment on both sides.
The purpose of the swing is to control the flow of molten metal and obtain the necessary weld width to obtain better weld formation.
Positive and negative crescent shaped electrode manipulation
When this method is used for welding, the end of the electrode will swing left and right in crescent shape along the welding direction.
The swing speed shall be determined according to the weld position, joint type, weld width and welding current value.
At the same time, it is necessary to stay on both sides of the joint for a while to make the weld edge have enough penetration to prevent undercut.
The advantages of this method are that the metal melts well, the heat preservation time is long, the gas is easy to separate out, the slag is easy to float to the weld surface, the weld quality is high, but the weld reinforcement is high.
Splayed strip method
When this method is used for welding, the end of the electrode will move in a figure of eight and move forward continuously, as shown in Fig. i.
The key point of this method is to ensure that the weld edge can be fully heated, uniformly melted, and fully welded.
It is applicable to butt welds with grooves on thick plates.
If two weldments with different thicknesses are welded, the electrode should stay on the side with greater thickness for a while to ensure uniform heating, full melting, and good weld formation.