PRESS AGGREGATE FOR PUNCHING HOLES IN STEEL SHEET Russian patent published in 2003 - IPC

FIELD: plastic metal working, possibly forging equipment designed for punching holes in steel sheet. SUBSTANCE: press aggregate includes layer of upper beams and layer of lower beams. Die sets are mounted on lower beams; on upper beams hydraulic cylinders are mounted. Number of hydraulic cylinders corresponds to number of die sets. Press aggregate also includes hydraulic drive unit with pump and hydropneumatic accumulator. EFFECT: possibility for punching holes in any size sheets without limiting size of die sets, enlarged range of efforts realized in press aggregate. 2 dwg