Fundamental Study of Electrospark Forming : Deformation of Cylindrical Shell and Circular Diaphragm

Abstract

In order to put electrospark forming method to practical use, generalized informations are necessary. Present paper is concerned with the analyses on the deformation of a cylindrical shell and a circular diaphragm in electrospark forming. The analyses are based on the Newtonian equation of motion, the maximum shear stress theory and a few assumptions. The applicability of the analyses was confirmed by the experiments with specimens of aluminum, copper and steel. Finally, the laws of similarity which can predict the deformation of the cylindrical shell and the circular diaphragm are obtained on the basis of the analyses and the experimental results.