Abstract
The work is dedicated to EMF attraction processes which can deform both ferromagnetic and non-ferromagnetic sheet metal materials (low carbon steels, stainless steels and aluminum alloys) using low frequency discharges. The analytical models of both tooling configurations are based upon the solution of Maxwell equations in axially symmetrical formulation. For ferromagnetic materials, the attraction effect is based upon magnetic forces prevailing over the Lorentz forces for low frequency discharges. For nonferromagnetic materials, the attraction forces are created by employing the auxiliary screen which attracts the sheet metal blank. The concept of attraction in this inductor system is based upon inducing currents flowing in the same directions in the screen and in the sheet metal blank. In addition to the analytical models, the described concepts are illustrated by the experimental results on attraction of sheet metal blanks employing a single turn inductor.
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