DRIVE DEVICE FOR A BENDING PRESS

The invention relates to a drive device (1) for a bending press (3), in particular a press brake, with a press frame (10) comprising a stationary press beam (2) and having a press beam (4) which can be displaced relative to the press beam (2) by means of a beam adjusting device (6) formed by a closed hydraulic system (5) comprising a hydraulic pump (46) with a controllable drive motor (47), at least one control valve (48) and at least one hydraulic linear actuator (7). The linear actuator (7) comprises a first piston arrangement (25) with a first piston (27) dividing a cylinder chamber (34) into a first pressure chamber (35) and a second pressure chamber (37) and, in another cylinder chamber (39), a second piston arrangement (26) with another piston (28) and at least one other pressure chamber (40). The first piston arrangement (25) and the second piston arrangement (26) are coupled with one another.