High current and speed welding technology for metal active gas arc welding

摘要

The present invention relates to a high-current magnetron high-speed welding method, and its object is also high speed steel constructions joints front chocheung welded to the surface at the same time, weld time, and improved so as to obtain a high penetration short machining process, and thereby efficient working high current magnetron capable of performing a high speed to provide a welding method.; The present invention is a first step of welding chocheung the joint front improvement unit root portion of the steel structure, the chocheung welding is over and the rest of the second step of jancheung welding, the chocheung welding and front improve weld by jancheung welding in the third step, and a joint welding method for steel structure consisting of a fourth step in which the front end of an improving part welded steel constructions joints back to the feed end of the joint portion of steel structures to improve the rear part the welding process; The joint front part chocheung improved welding is provided with a high welding current condition of use 1300-1500 amperes, operational voltage 23-28 V, it adopted 4.0㎜φ large-diameter wire, carbon dioxide (CO ₂₎ 95% with argon (Ar ) of 5% by using a mixed gas as protective gas, the angle of the welding electrode Jonggak (Travel angle) push (push) 5 ° ± 3, hoenggak maintain a 90 ° ± 1, and the wire projecting distance (electrode stick out length) MAG with a large current by the MAG welding can be arranged in high speed welding at speeds of 25~27㎜ 5~8m / min to provide a high-speed welding method.