EP 0417754 B1 19930908 - MECHANICAL OR HYDRAULIC PRESS WITH DRAWING OR PRESSING STATION FOR MULTIPLE STAGE PRESS
Title (en)
MECHANICAL OR HYDRAULIC PRESS WITH DRAWING OR PRESSING STATION FOR MULTIPLE STAGE PRESS
Publication
Application
Priority
DE 3930349 A 19890912
Abstract (en)
[origin: EP0417754A2] The invention proposes a mechanical or hydraulic press with a drawing device for drawing work or drawing station of a multiple stage press, in which the blank holding performed by a platen is effected by means of hydraulic clamping. In order to damp the impact which occurs when the top tool (7) strikes the platen (6) and, especially to damp the impact noise and to perform the subsequent drawing operation by means of positive control, the movement of the press ram (8) is transmitted to a pumping cylinder (12), the hydraulic fluid of which acts on a further pressure cylinder (17), which is connected to the die cushion (10) to give a preliminary acceleration. The clamping of the die cushion takes place via an accumulator (21) after the preliminary acceleration has been effected. <IMAGE>
IPC 1-7
IPC 8 full level
B21D 24/10 (2006.01); B21D 24/14 (2006.01)
CPC (source: EP)
B21D 24/10 (2013.01); B21D 24/14 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0417754 A2 19910320; EP 0417754 A3 19910612; EP 0417754 B1 19930908; DE 59002628 D1 19931014; ES 2045702 T3 19940116
DOCDB simple family (application)
EP 90117537 A 19900912; DE 59002628 T 19900912; ES 90117537 T 19900912