Global Patent Index - EP 0768127 B1

EP 0768127 B1 2000-07-12 - Drawing apparatus for a press

Title (en)

Drawing apparatus for a press

Title (de)

Ziehvorrichtung für eine Presse

Title (fr)

Dispositif d'étirage pour une presse

Publication

EP 0768127 B1 (DE)

Application

EP 96116085 A

Priority

DE 19538316 A

Abstract (en)

[origin: EP0768127A2] The device has a piston rod (5) to retain a metal sheet in a holder, which can be accelerated before the application of a drawing element. An accelerating cylinder (5) is fixed to the press, and has an accelerating piston which combines with the rod, and which has a larger first pressure surface which opposes the drawing direction, than its opposing second pressure surface. The corresponding first and second pressure spaces (7,8) in the cylinder around the accelerating piston can be connected to a pressure reservoir (11), and the first pressure space can also be connected to a dosing cylinder (15), in which a dosing piston (16) is guided. A forward stroke cylinder (17) is fixed to the press parallel to the retaining piston rod, and has a forward stroke piston rod (18) and a piston (19), which is separated from it by a controlled first pressure volume (20). A second pressure volume (21) can also be displaced by this piston.

IPC 1-7 (main, further and additional classification)

B21D 24/14

IPC 8 full level (invention and additional information)

B21D 24/14 (2006.01)

CPC (invention and additional information)

B21D 24/14 (2013.01)

Designated contracting state (EPC)

DE ES FR GB IT SE

DOCDB simple family

EP 0768127 A2 19970416; EP 0768127 A3 19970423; EP 0768127 B1 20000712; CZ 290543 B6 20020814; CZ 9602989 A3 19970416; DE 19538316 A1 19970417; ES 2149413 T3 20001101; US 5746084 A 19980505