Hydraulic press to cut sheet - has cross connected cylinders with double acting pump controlled by cam

摘要

The press frame (1) inside a cylinder block (2) has two pistons (3) and rods (4) connected to a slide (5). There is also a piston pump (6) fed on each side and a piston rod (7). The cylinders (8,9) above the pistons (3) and pump (6) are connected by pipes (10). Cylinders (11,12) below the pistons are joined by pipes (13). The pump piston stroke is controlled by a cam or by an eccentric or by a linear electric motor. Between the driving motor (20) and a shaft (21) is a flywheel (22) on the shaft itself.