Abstract: An electromagnetic forming apparatus having an expandable electromagnetic forming coil supported within an associated clamping press and having a pulse power system continuously operatively associated therewith to facilitate magnetic forming or swaging of conductive work pieces together. The forming coil employs a pair of conductive shaper halves conductively connected together in a single turn coil, the shaper halves being supported for relative movement therebetween while maintained in substantially parallel relation. The shaper halves have mutually cooperating forming recesses which receive the work pieces when the shaper halves are in open position and which define electromagnetic forming areas to swage the work pieces together when the shaper halves are closed and subjected to one or more power pulses.