Formation of deep-drawing in an open-die by pulsed-magnetic field pressure

Abstract

The deep-drawing process is considered one of the most important metal processing processes, which is used to form sheet metal of bowl-shaped structures in the field of mechanical engineering, aviation and rocket engineering under tension and compression without changing the sheet thickness. The present work is to evaluate the formability of an aluminum alloy sheet using an open-die in deep drawing process, an attractive manufacturing technique using electromagnetic force (Lorentz) to form metal parts. This work investigates the history of deformation (displacement, deformation, strain rate) in the process of electromagnetic deep drawing in an open-die using a numerical model. The research methods are the finite element method (FEM) associated with the boundary element method (BEM) using LS-DYNA software for the analysis of electromagnetic, mechanical and thermal solvers. Results analysis of the deformable solid thickness in the process of deformation showed that the thickness increased in the marginal zone and reached 1.77 mm. Further, the thickness in the middle zone decreased by 0.23 mm and decreased by 0.35 mm in the central zone. The plastic deformation of the workpiece gradually increased from zero to 26% for the middle zone, 31% for the marginal zone and 46% for the central zone.