Pulsed Electromagnetic Attraction Processes for Sheet Metal Components
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Date
2014
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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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Keywords
electroforming, tool, metal forming