Melting welding: When welding by this method, the welding joint needs to be heated to a melted state without applying pressure.
There are many welding welding methods, which can be divided into arc welding, gas welding and electric slag welding lamp.
Pressure welding: this method in the welding process, the need to apply pressure on the welding parts, to the nut to complete the welding. The commonly used pressure welding methods are resistance welding, ultrasonic welding and friction welding, each welding method is different.
Braze: this method is to use the metal material with low melting point, the welding parts are heated to a certain temperature, to complete the nut welding work.