Welding machine in resistance welding machine series. Broadly speaking, it also belongs to the category of welding machines.
Using the upper and lower water-cooled electrodes for pressurization, a short period of high current is required to generate molten nuclei in the electrode contact area. The no-load voltage is low to prevent electrode melting and adhesion to the base material. A welding process that achieves welding results.
Narrowly defined welding machines refer to manual arc welding machines with welding rods. Belongs to melting electrode welding (where the welding rod serves as the electrode and melts and fills to form a weld seam). The no-load voltage and working voltage are relatively high. High no-load voltage facilitates arc ignition; High working voltage facilitates the melting of electrodes (welding rods). And ensure the depth of weld penetration.
Welding machines generally do not use welding rods, but directly weld the two parts of the metal together
1. Common methods include resistance welding - using high resistance at the contact point to raise the temperature of the material near the melting point under electrical conditions, and then applying pressure to bond them together.
2. Friction welding - using high-speed rotation of two contact ends, the high temperature generated by friction raises the temperature of the material at the contact point to near the melting point, and then pressurizes it to bond together.