What are automatic welding, semi-automatic welding and manual welding?

Mechanization and automation of welding process is an important development of modern welding technology. It not only marks higher welding production efficiency and better welding quality, but also greatly improves working conditions. In the process of manual arc welding, the main welding action is to ignite the arc, send it to covered electrode to keep a certain arc length, move the arc forward and extinguish it. If these actions are done automatically by the machine, it is called automatic welding. \ x0d \ x0d \ usually refers to manual arc welding with wire feeder, that is, welding wire is used for welding, and the welding wire is automatically fed, but the welding gun moves along the weld by hand, and common MIG, MIG and CO2 are semi-automatic welding; \ x0d \ x0d \ manual welding repair is a process step that requires excellent operation skills and good tools; An inexperienced operator may have a reliability nightmare. When equipped with adequate tools and training, operators should be able to create reliable welding points. Manual surface mount welding is sometimes more challenging than through-hole welding because the pin spacing is smaller and the number of pins is larger. During maintenance, care must be taken not to overheat the printed circuit board; Otherwise, the plated through holes and pads are easy to be damaged.