Transfer system for presses and press assembly

A press assembly, comprising:

• a first press;
• and
• a second press, wherein each of the first press and the second press comprises:
• at least two fastening units arranged opposite one another, wherein each of the fastening units has a first fastening region;
• a press transfer unit comprising two movement arms arranged opposite one another and a crossbar connected thereto for receiving and transporting a workpiece,
• wherein each of the movement arms has a first drive unit connected to the first fastening region, a first lever arm, a second drive unit and a second lever arm, and
• wherein the first lever arm is connected at a first end thereof, or between the first end and a second end, to the first drive unit, and at the second end thereof is connected to the second drive unit, and
• wherein the second lever arm is rotatably connected at a first end thereof to the second drive unit, and is movably connected with a second end thereof to the crossbar;
• and
• at least one energy-storing element for each movement arm, the at least one energy-storing element being formed and arranged such that a force or a force component thereof points in an acceleration direction of the crossbar with or without the workpiece, wherein at least one of:
• a second fastening region is provided on each fastening unit, and the at least one energy-storing element is connected directly or indirectly with a first end thereof to the second fastening region, and is fastened on a second end thereof at a specified region of the movement arm, or
• the at least one energy-storing element is fastened with a first end to the first lever arm and with a second end thereof to the second lever arm,
• wherein the movement arms have an initial position, in which at least the first lever arm stands virtually in a vertical axis, and are moved from the initial position into a first position by means of a specified motion sequence, and are moved into a second position and back by passing the initial position;
• and
• wherein the at least one energy-storing element is configured such that it has a minimally stored energy in the initial position, and is charged with energy to a specified degree in a movement phase between the initial position and the first position or between the initial position and the second position, and
• outputs the stored energy in a movement phase between the second position and the initial position or between the first position and the initial position;
• and
• wherein the second press is arranged behind the first press and in a specified machining direction such that the workpiece is configured to be transferred from the first press to the second press by the movement arms.