Explanation

Also called contact welding. After the weldment is assembled, apply pressure through the electrode, and use the resistance heat generated by the current passing through the joint contact surface and adjacent areas to conduct weld. When the weldment is assembled into a lap joint, the resistance heat causes the weldment to melt at the pressed contact to form a nugget, which forms a welding spot after condensation. This is called sport welding; If a pair of roller electric wheels is used to replace the cylindrical electrode of sport welding, with the relative movement with the weldment, a sealed weld with overlapping nuggets will be produced, which is called seam welding. When welding components are assembled into butt joints, resistance heat heats the contact surface and adjacent areas to a thermoplastic deformation state, and then applies top forging force to complete the connection, which is called resistance butt welding; Resistance heat causes metal to splatter and form a flash, which is then applied with forging force to complete the connection, which is called flash butt welding; high frequency resistance welding refers to the process of using high-frequency current to generate resistance heat in the joint area.

Classification