Estimation of charging voltage for electromagnetic welding

Electromagnetic welding (EMW) is a solid state impact welding technique in which pulsed electromagnetic field is used for welding electrically conductive work pieces. The technique has become an accepted welding process because it enables to join similar, as well as dissimilar metals, which is very difficult to weld by conventional techniques due to differences in melting points. In EMW process, the input energy is the capacitive energy and the job piece to be welded is placed very close to the electromagnetic coil. The welding is accomplished by impact, when the colliding job pieces are accelerated towards each other by the Lorentz force. The electromagnetic and mechanical properties and parameters of the equipment, tool and the job govern the overall welding process. In this paper a proposed analytical model is investigated and parameters such as magnetic Pressure, magnetic field and Voltage for weld formation is theoretically found and is further validated with data available in the literature & simulation using FEM software.