Working principle of spot welding machine
The metal is welded by a large current
A strong current (usually above 10 thousand A) through a secondary circuit, instantaneously produces a large amount of resistance heat at the point where welding is needed to fuse the metal and form a solder joint. Geneo port good spot welder.
The electrode and the weldment are respectively connected with the two output terminals of the power supply. When welding begins, contact the welding rod and the weldment first. At this time, the power supply is short circuited, and the current flowing through the contact is very large. Moreover, the contact surface of the electrode and the weldment is coarser, but only a few points of contact are in fact, and the contact resistance is large, so that the contact place produces great heat. The electrode is further removed, so that the electrode and weldment have a certain clearance.
