DESIGN OF ELECTROHYDROIMPULSE SHEET METAL FORMING USING LS-DYNA

Abstract

Stages of the transferring processes of electrical energy stored in the capacitor battery into the energy of plastic deformation were considered. Model of a discharge circuit with the variable part of resistance defined by electrical resistance of the discharge channel and model of formation and extension of plasma - vapour cavity during electric discharge in a liquid were presented. Using the example of manufacturing a part of complex geometry, the possibility of estimating pressure parameters in computer modelling of combined electrohydraulic sheet forming in the LS-DYNA complex is considered. An equivalent axisymmetric die model with the same volume and depth was constructed. Appearing of the pulsed and quasistatic nature of the workpiece deformation during the different stage of electrohydraulic discharge in large - volume chambers were carried out. The developed computer model of multi-digit sheet forming made it possible to evaluate the pressure parameters and determine the required changes in the parameters of the technological process.