Patent EA-001306-B1 (EA)
Title: Multistage metal-forming machine tool
Inventor: RUCHTI DANIEL
IPC: B21K1/04
Filed: 1998-06-09
Abstract: 1. A multistage metal-forming machine tool having a last metal-forming station (1) which divides combined pieces (2) into two finished pieces (21, 22), and at least one delivery device (3, 4) for transferring the finished pieces, characterized in that comprises at least two delivery devices (3, 4) to transfer the finished pieces, each device is equipped with a transfer device (5, 6, 7), which transfers a finished piece (21, 22) from the last forming station (1) to the delivery device (3, 4) for transferring the finished pieces. 2. A multistage metal-forming machine tool as claimed in claim 1, characterized in that comprises tongs (11', 11) for transferring combined pieces (2) from one position (1'', 1', 1) to a next one, wherein the tongs (11', 11) are mounted on, at least, one common holder or holders (12, 13) to enable joint displacement in a transverse direction, while one of the transfer devices (5) comprises a transfer collet (51), which is positioned on the common holder(s) (12, 13) of the tongs. 3. A multistage metal-forming machine tool comprises upper (12) and lower (13) tong holders as claimed in claim 1, characterized in that the transfer tongs having an upper claw (52) positioned on the upper holder (12) and a lower claw (53), positioned on the lower holder (13). 4. A multistage metal-forming machine tool as claimed in claim 3, characterized in that the lower claw (53) has only one clamping jaw (531) arranged so, that, facing the corresponding device (3) for transfer the finished piece the side of gripped portion (21, 22) of a piece is free. 5. A multistage metal-forming machine tool as claimed in claim 3 or 4, characterized in that the upper claw (52) with the help of a device of compulsory displacement, which can have a spring of preliminary tension, enable to move in the direction of claw and can be provided a device for an advance opening, which comprises, for example, an inclined stage (55) for lifting the upper claw (52), which before reaching the device (3) for transferring the finished piece, moves the upper claw (52) to a predetermined distance in the direction of opening. 6. A multistage metal-forming machine tool as claimed in claims 1 to 5, characterized in that one of the transfer devices (6, 7) comprises a slide way (61, 71) for receiving a finished piece (22) from the last forming station (1), said slide way is positioned between the last forming station (1) and associated with it the device (4) for transferring the finished piece, as well as a device for pushing a finished piece (22) from the slide way (61, 71) to the device (4) for transferring a finished piece. 7. A multistage metal-forming machine tool as claimed in claim 1, characterized in that the pushing device comprises a pivoting kick handle (62) for pushing a finished piece (22) situated on the slide way (61) to the delivery device (4). 8. A multistage metal-forming machine tool as claimed in claim 6, characterized in that the pushing device comprises a push rod (72) for transferring a finished piece, situated on the slide way, to the device (4) for transferring a finished piece. 9. A multistage metal-forming machine tool as claimed in claim 7 or 8, characterized in that the pivoting kick handle (62) or the push rod (72), directly or through, at least, one clamp or a carriage (73) can be activated by a tong (51, 11, 11'), the tong's holder (12, 13), a punch or an ejector of the last forming station, driving means of one of said elements or a separate driving means. 10. A multistage metal-forming machine tool as claimed in claims 1 to 9, characterized in that at least one delivery device (3, 4) for transferring finished pieces comprises an inclined trough (31, 41), which can have a movable terminal part (11) or a belt conveyer on the side facing the corresponding transfer device (5, 6, 7).