Welding method of pe butt welder

PE butt welding machine can be divided into flash PE butt welding machine, steel bar PE butt welding machine and copper rod PE butt welding machine according to different welding methods. Flash butt welding mainly uses the contact resistance of the workpiece to generate heat to heat the workpiece. The metal surface melts, the temperature gradient is large, and the heat affected zone is relatively small. The welded joint is formed under plastic deformation of the solid metal opposite to the workpiece. The structure and composition of the weld are close to the base metal (or after heat treatment), so it is easier to obtain equal strength plastic welded joints. The flash evaporation process has the effect of exhausting air and reducing the self-protection of metal oxidation. Forging can also discharge liquid metal oxides from welds. There are fewer defects such as weld inclusions and incomplete penetration. The flash process has a strong self-adjustment function, low requirements for strict consistency of the specification, and stable welding quality. The welding cross-sectional area of the unit needs low electric power, and the welding of low carbon steel only needs (0.1-0.3) kVA/mm2 electric power. High welding productivity. It only takes a few seconds to tens of seconds to weld the joints.