Abstract
This paper describes a new seam welding technique and its experimental results. When an impulse current from an energy-storage capacitor bank passes through a flat one-turn coil, a high-density magnetic flux is suddenly generated around the coil. Eddy currents are induced inside the overlapped ends of two sheets of various Aluminum alloy (thickness 1 mm) placed outside the coil. The sheets have a gap between them. The ends can be joined both by the Joule heat generated in them and by the impact effect with pulsed magnetic pressure applied to them from one side. Bank energies required for seam welding an area 5x100 mm^2 are less than 1.3 kJ for A1050 sheets and 3.5 kJ for A5182 sheets, respectively.
