Main parts of electric welding machine

The main component of the electric welding machine is a step-down transformer. The two ends of the secondary coil are welded and welding rods. The arc is ignited when working, and the electrode is fused to the slot in the high temperature of the arc. Because the iron core of the welding transformer has its own characteristics, it has the characteristic of sharp drop of voltage, that is, the voltage drops after the electrode is ignited, and the voltage drops sharply when the electrode is short circuited by adhesion. In the welding operation, although the current in the circuit is equal everywhere, but because of the different resistance, the maximum resistance at the unfixed contact is the contact resistance, according to the law of the thermal effect of the current (also called the jar’s law), that is, Q=IR.t can know that the higher the resistance is, the higher the heat is in the current phase. So when welding, the contact of the electrode is the most contact resistance at the contact of the metal body, and the electric heating is the most natural in this area, and the welding rod is the alloy with low melting point, and it is easy to melt. After melting, the alloy welding rod is bonded to the welded object, and then the welding object is bonded to one piece after cooling.