A forming machine for forging, in particular stretch-forging, metal workpieces, which have been heated and/or are in flowable condition, comprising
- a) at least two forming tools (4A, 4B),
- b) at least one driving device for driving at least one of the forming tools in an approach motion (R) of the forming tools toward one another or in a return motion of the forming tools away from one another,
- c) wherein the driving device comprises at least one eccentric element (22A, 22B) and at least one hydraulic drive element (11A, 11B),
- d) wherein the at least one hydraulic drive element (11A, 11B) is coupled hydraulically directly or indirectly to the eccentric element (22A, 22B) in such a way that an eccentric motion of the eccentric element produces a working motion of the hydraulic drive element by way of a hydraulic medium, and
- e) wherein the at least one hydraulic drive element (11A, 11B) is coupled to the at least one forming tools (4A, 4B) and, in the working motion thereof, drives the at least one forming tool,
- f) in which at least part of the hydraulic drive element (11A, 11B is arranged in a hydraulic chamber (13A, 13B) filled with hydraulic medium and divides the hydraulic chamber (13A, 13B) into a front subchamber (15A, 15B) and a rear subchamber (14A, 14B),
- g) in which the rear subchamber (14A, 14B) of each hydraulic chamber is assigned a hydraulic setting device (C64A, 64B, 54A, 54B, 34A, 34B) for setting an end position of the hydraulic drive element (11A, 11B) in the working motion, by setting a supplied volume or pressure of the hydraulic medium in the rear subchamber (14A, 14B), wherein the hydraulic setting device has a hydraulic pump (64A, 64B) and a port (34A, 34B) on the rear subchamber (14A, 14B) and an associated hydraulic connection (44A, 44B) of the hydraulic pump (64A, 64B) to the port (34A, 34B),
- h) wherein the hydraulic pump (64A, 64B) is a hydraulic servopump and has a position-controlled servomotor (54A, 548), which holds the at least one hydraulic drive element firmly in position,
- i) wherein the front subchamber (15A, 15B) is in fluid communication with an intermediate chamber (26A, 26B) via a front connecting duct (25A, 25B), said chamber in turn being in fluid communication with a reset device (65, 75A, 75B), wherein the reset device (65, 75A, 75B) is connected to a hydraulic connection (45), in which a pressure measuring device (56) is arranged and which divides into two parallel branches (45A, 45B), each of the two branches (45A, 45B) being connected to one of the intermediate chambers (26A, 26B) in such way that the reset device (65, 75A, 75B) is coupled hydraulically to the front subchamber (15A, 15B) for exerting a resetting force on the associated hydraulic drive element (11A, 11B).