放電成形に関する研究

Abstract

The deforming behaviors of electrohydraulic forming were studied with the plastic strain gages directly attached to sheet. The first part of this study is intended to study the effect of the experimental conditions, especially the size effect of the water tank. In the second part, the strain-time diagrams of the first and the second deformations are measured and studied. The main results obtained are as follows.1) The deforming process is generally divided into several stages in the large tank and the volumes of the first and second deformations take the large part of total deformation.2) The volume of the first deformation decreases with the size of the tank, and the volumes of the others increase with the size of the tank.3) The strain-time diagrams are measured. The duration of the deformation, the strain rate and so on are cleared up.4) The effect of the air bag on the deforming process is cleared up and the result coincides with that of the high speed photograph.