A bank of capacitors is first charged to a high voltage and then discharged across a gap between two electrodes causing explosions inside the hollow work piece which is filled with some suitable medium generally water. Bending is the forming of a sheet metal work about an axis. Among these techniques electromagnetic forming is a high speed process using a pulsed magnetic field to form the work piece made of metals such as copper and aluminum alloys with high electrical conductivity which results in increased deformation higher hardness reduced corrosion rate and good formability.
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