The invention relates to a gas shielded
welding method and device of a
narrow gap or a super-
narrow gap impulse jet current consumable
electrode controlled by electromagnetic of the heavy section part with middle and high strength. The invention uses a magnetic coil (3) to provide
excitation current processed by an excitation source, which can generate an extra
magnetic field. Under the conditions of
narrow gap or super-narrow gap, high feed rate, fused drop spray transfer and impulse
welding current, the process of the gas shielded
welding of the rotating jet current consumable
electrode with high-melting frequency pulse that is controlled by the electromagnetic for the heavy section part with middle and high strength can be realized. The device of the invention comprises the excitation source, excitation equipment, auxiliary equipment and a
water cooling system. The excitation equipment is the magnetic coil (3) with or without a conducting core (5). The excitation equipment is fixed on a welding burner (6), which is positioned above a work piece (9). The
excitation current provided by the excitation source (10) produces stationary or time-varying electromagnetic mixing
magnetic field that has the combination control over the processes of
arc welding, wire burn-off, drop transfer, melting bath flow and welding line coagulation, which finally forms the welding line of good quality.