Affiliations: [a] Accelerator & Pulse Power Division, Bhabha
Atomic Research Centre, Mumbai-400 085, India | [b] ADS Target Development Section, Bhabha Atomic Research
Centre, Mumbai-400 085, India | [c] Mechanical Metallurgy Section, Bhabha Atomic Research
Centre, Mumbai-400 085, India
Abstract: In Electromagnetic Welding process, the electromagnetic parameters
govern the welding process. The collision velocity is the crucial parameter
that decides the quality of the weld joint. The EMW process is comparatively
less efficient for low electrical conductivity metals. However, the efficiency
of the process can be improved by using high electrical conductivity metals,
such as copper, aluminum (named as `drivers') which are placed adjacent to the
job piece. In this paper, the performance of different driver materials is
analyzed. This exercise is important from the point of view of minimization of
input energy. The computation of the collision velocity is carried out by
commercial software's. The results are verified with experimental observations.
The job pieces chosen are flat strips of aluminum, copper and S.S. Needless to
say, the conclusions drawn are applicable to any other geometry. Since the EM
forming process precedes the EMW process, the conclusions are also applicable
in the case of the former process.
Keywords: Electromagnetic welding, impact collision velocity, capacitor bank, Lorentz force, ringing frequency, current skin depth
