PERCUSION-ACTION ELECTROHYDRAULIC VIBRATOR Russian patent published in 1997 - IPC

FIELD: plastic metal working, namely production of heavy large-size double-curvature sheet parts in stretching presses. SUBSTANCE: electrohydraulic percussion-action vibrator includes housing with working table and discharge chamber filled by liquid. Electrodes being part of discharging circuit connected with power source are mounted in said discharge chamber. Working table may perform oscillation motion in vertical direction by action of pressure pulses. At last one additional discharging circuit connected with power source is also arranged inside discharge chamber. Electrodes of said circuit and electrodes of main discharge circuit may be moved for adjustment and for changing spark gap value. Working table is provided with adjustable rests limiting oscillation motion amplitude and it is spring-loaded relative to said rests towards said discharge chamber. EFFECT: improved design. 1 dwg