Stamping press and method for stamping a round blank

Stamping press (10) for stamping a round blank (14) comprising:

• a ram (11) that is movable in a stroke direction (H) to a stamping position (P) for stamping the round blank (14) and opposite to the stroke direction (H) in a return stroke direction (R) by means of a rain drive (12);
• a first stamping tool (13) that is arranged at the rain (11), having a second stamping tool (15) that is arranged at a press framework (16) and having a stamping ring (22);
• an ejector device (30) that comprises an ejector pin (31) that is configured to move the second stamping tool (15) in the return stroke direction (R) out of the stamping position (P) in an ejecting position (E) in order to eject a stamped round blank (14) out of the stamping ring (22), the rain (11) and the ejector pin (31) linearly moveable in operative arrangement along a common working axis (A);
• a connection device (33) comprising an actuating device (32) supporting the ejector pin (31) and at least one connection rod (34) that movably couples the rain (11) and the actuating device (32) with each other;
• a coupling device (55) is arranged between the actuating device (32) and the ejector pin (31) that is configured to couple the actuating device (32) and the ejector pin (31) in a coupling position (K) in the return stroke direction (R) with each other and to decouple the actuating device (32) and the ejector pin (31) in a decoupling position (D) in the return stroke direction (R) from each other;
• the coupling device (55) comprises a first coupling part (56) coupled with the actuating device (32), a second coupling part (57) coupled with the ejector pin (31), the first coupling part (56) and the second coupling part (57) in the coupling position (K) coaxially arranged along the common working axis (A) positioned in direct contacting relationship with each other, the first coupling part (56) and the second coupling part (57) in the decoupling position (D) positioned in non-contacting relationship with each other, and a coupling drive (58) configured to at least move from the coupling position (K) one of the first coupling part (56) and the second coupling part (57) orthogonally or obliquely relative to the common working axis (A) to the decoupling position (D);
• wherein in the decoupling position (D) any movement of the actuating device (32) in the return stroke direction (R) does not cause a movement of the ejector pin (31) in the return stroke direction (R);
• and,
• wherein the ejector pin (31) does not engage the second stamping tool (15) with a force in the return stroke direction (R) until the second stamping tool (15) has reached the stamping position (P) and the coupling drive (58) at least moves one of the first coupling part (56) and the second coupling part (57) from the decoupling position (D) to the coupling position (K) and the rain (11) is moved in the return stroke direction (R) by means of the rain drive (12) after the round blank (14) has been stamped.