Different welding methods have different welding processes. The welding process is mainly determined according to the material, brand, chemical composition, structure type and welding performance requirements of the welded parts. First of all, the welding method should be determined, such as hand arc welding, submerged arc welding, tungsten electrode argon arc welding, melting electrode gas welding and so on. After the welding method is determined, the welding process parameters are formulated. The types of welding process parameters are different. For example, manual arc welding mainly includes: electrode model (or brand), diameter, current, voltage, welding power source type, polarity connection method, welding layer number, trace number, inspection method and so on.