First of all, we should know that any swing mode of welding has a great relationship with weld bead position, groove form and welding layer number.
The main purpose of welding swing is to control the uniform heat input, fully fuse with the base metal, and then weld formation.
As the saying goes, swing welding: mainly because of the large weld width or technical requirements, in order to form beautiful (mostly fish scales) and a welding swing mode. The swing speed, amplitude and frequency are related to the parent material and power supply current. The material conducts heat quickly, so the relative current is small and the swing is fast.
For example, when many people swing, they all take the porcelain mouth as their back, or even the gun handle as their back. This has advantages and disadvantages, so I won't say much here.
Regarding the pendulum shape, in fact, argon can effectively protect the molten pool as long as attention is paid to feeding the wire to the edge of the molten pool during welding. Don't forget, welders are painters, inventors and artists, whether it's figure 8, Z or crescent.
Finally, add a sentence: Exercise arm strength and stability at ordinary times, pay attention to breathing frequency and amplitude, and enhance arm stability.