The principle of the welding machine

is to use the high-temperature arc generated when the positive and negative poles are short-circuited for a moment to melt the solder on the welding rod and the material to be welded, so as to achieve the purpose of combining them. The structure of the welding machine is very simple. To put it simply, it is a high-power transformer that converts 220/380V AC into a low-voltage, high-current power supply, which can be DC or AC. The welding transformer has its own characteristics, that is, it has the characteristic of a sharp drop in voltage. After the welding rod is ignited, the voltage drops. In the adjustment of the working voltage of the welding machine, in addition to the primary 220/380V voltage conversion, the secondary coil also has a tap to change the voltage, and there is also an iron core to adjust. The adjustable iron core welding machine is generally a high-power transformer, which is made based on the principle of inductance. The inductance will produce a huge voltage change when it is connected and disconnected. The high-voltage arc generated when the positive and negative poles are short-circuited for a moment is used to melt the solder on the welding rod to achieve the purpose of combining them. Voltage is applied between the electrode and the workpiece, the arc is ignited by scratching or contact, and the energy of the arc is used to melt the electrode and heat the parent material.