Formaplode: Project Background

Electrohydraulic sheet metal forming is one of a number of techniques for high velocity metal forming. Electrohydraulic forming uses the explosive force generated by a high energy underwater discharge to deform a workpiece into a die. A basic apparatus for electrohydraulic forming includes a pressure vessel containing the water and electrodes, a matching die, a capacitor bank, an electronic control system to trigger the discharge, and the workpiece.

In general, high velocity metal forming techniques have advantages in forming complex parts with close tolerances, from alloys that might not be formable by stamping. These advantages come from interesting differences in the behaviors of metals being deformed at high velocitys, versus metals deformed slowly. Theoretical explanations of these phenomena center on the effects of inertia at very high rates of strain, which appear to inhibit necking and void formation in the workpiece, and thus delay failure.

Resources on Electromagnetic and High Velocity Forming


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