Compression of a tubular workpiece by electromagnetic forming<br>When the switch is closed, electrical energy stored in the capacitor bank (left) is discharged through the <b>forming coil</b> (orange) producing a rapidly changing magnetic field which induces a current to flow in the metallic <b>workpiece</b> (pink). The current flowing in the workpiece produces a correspondingly opposite magnetic field which rapidly repels the workpiece from the forming coil, reshaping the workpiece. The reciprocal forces acting against the forming coil are resisted by the <b>supportive coil casing</b> (green).
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GFDL
<a href="//commons.wikimedia.org/wiki/File:Magnetumformung1.jpg" title="File:Magnetumformung1.jpg">File:Magnetumformung1.jpg</a>