Flash butt welding

The principle of flash butt welding is to use a butt welder to make the two ends of the metal contact, through a low voltage strong current, after the metal is heated to a certain temperature and softened, the axial pressure upsetting is performed to form a butt welded joint.

Before the two weldments are in contact, they are clamped by the two clamp electrodes and connected to the power source. The movable fixture is moved. The end faces of the two weldments are lightly contacted to be energized and heated. The contact point blasts due to the heating to form liquid metal, and the jet sparks to form a flash. The movable fixture is continuously moved, flashing occurs continuously, and both ends of the weldment are heated. After reaching a certain temperature, the end faces of the two workpieces are squeezed to cut off the welding power source and welded together firmly. Use resistance to heat the weldment joint to make the contact point flash, melt the metal on the end face of the weldment, and quickly apply top force to complete the welding.