Dual Electromagnetic Forming Using Single Uniform Pressure Coil

Abstract

Electromagnetic Forming (EMF) is a high-speed forming process that can be applied for shaping, joining and cutting of workpieces made of electrically conductive material eg. aluminium. This paper proposes a dual electromagnetic forming method. Energy efficiency of the dual electromagnetic forming is compared with the single sided electromagnetic forming using FEM simulations. In uniform pressure rectangular coil, the top layer of the coil assists in the deformation of the workpiece while the bottom layer hinders the workpiece deformation.To make the bottom layer of the coil also to assist in the deformation of the workpiece, a uniform pressure rectangular coil is designed and placed between the two sheet metal workpiece. The efficiency of the two processes are compared by determing the maximum deformation obtained for each case.

Development of alternative technology of dual forming of profiled workpiece obtained by buckling

“…Twin die-forging (dual forming) is a type of multiple stamping, cases of successful twin workpieces application for electric-hydraulic [10] and sheet [11,12] forging are known. The objective of twin forging can also be improvement of the indices of application of workpieces metal [13].…”

“…The process was developed for eye-bolt forgings, stamped in dolly-die on SFP with nominal force, equal to 6.3 MN. Construction of the epures of diameters (of a specified workpiece) and section epures was carried out in accordance with well-known rules [6,10], i. e. for each particular i-th section its area p.i S was determined as well as the area of two-sided fin ob 2S with due regard to stack filling. Then, the area of the epure in its i-th section = + .…”