MAGNETODYNAMIC WELDING APPARATUS Russian patent published in 1995 - IPC

FIELD: welding practice. SUBSTANCE: apparatus comprises a folding inductor with coaxial winding in its circular slot. The winding has a loop above the joint of folds, and a plug connector for all winding coils on plates which are secured to fold jaws. On encompassing the joint of parts to be welded and applying alternating current to the winding, two parallel unidirectional mutually-attracted currents are induced under said winding. Edges are fused by heating with current and magnetic interaction of currents draws metal into the joint gap. As inductor is cut off, said joint solidifies and forms a weld. EFFECT: improved design. 4 dwg