EP 3885058 A1 20210929 - DIE-CUSHION DEVICE AND PRESS MACHINE
Title (en)
DIE-CUSHION DEVICE AND PRESS MACHINE
Title (de)
STEMPELKISSENVORRICHTUNG UND PRESSMASCHINE
Title (fr)
DISPOSITIF COUSSIN PNEUMATIQUE ET PRESSE
Publication
Application
Priority
- JP 2018243620 A 20181226
- JP 2019036506 W 20190918
Abstract (en)
A die cushion apparatus (200) includes: a double-acting hydraulic cylinder (210) configured to move a cushion pad (140) up and down; a first hydraulic pump (P1) configured to supply a hydraulic oil from an oil tank (T) to a first port (210a) of the hydraulic cylinder (210) and to drive a piston (212) of the hydraulic cylinder (210) upward; a second hydraulic pump (P2) configured to supply the hydraulic oil from the oil tank (T) to a second port (210b) of the hydraulic cylinder (210) and to drive the piston (212) of the hydraulic cylinder (210) downward; and a control unit (260) configured to control a rotation speed of the first hydraulic pump (P1) and a rotation speed of the second hydraulic pump (P2) and to control a flow rate and a pressure of the hydraulic oil which the first hydraulic pump (P1) supplies to the hydraulic cylinder (210) and a flow rate and a pressure of the hydraulic oil which the second hydraulic pump (P2) supplies to the hydraulic cylinder (210).
IPC 8 full level
B21D 24/02 (2006.01); B30B 15/00 (2006.01); B30B 15/02 (2006.01)
CPC (source: EP)
B21D 24/02 (2013.01); B21D 24/14 (2013.01); B30B 15/14 (2013.01); F15B 11/08 (2013.01); F15B 2211/20515 (2013.01); F15B 2211/20561 (2013.01); F15B 2211/20584 (2013.01); F15B 2211/2658 (2013.01); F15B 2211/50518 (2013.01); F15B 2211/56 (2013.01); F15B 2211/6313 (2013.01); F15B 2211/6651 (2013.01); F15B 2211/7053 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3885058 A1 20210929; EP 3885058 A4 20220126; EP 3885058 B1 20230104; JP 2020104131 A 20200709; JP 6662445 B1 20200311; WO 2020137032 A1 20200702
DOCDB simple family (application)
EP 19902428 A 20190918; JP 2018243620 A 20181226; JP 2019036506 W 20190918