EP 0207639 A1 19870107 - Control device for a hydraulic press.
Title (en)
Control device for a hydraulic press.
Title (de)
Vorrichtung zur Regelung einer hydraulischen Presse.
Title (fr)
Dispositif de commande d'une presse hydraulique.
Publication
Application
Priority
GB 8513955 A 19850603
Abstract (en)
A hydraulically operated cutting press of the moving bed type has four piston-and-cylinder arrangements (C1-C4) arranged at or adjacent each corner of the cutting bed (24) and a balancing mechanism (58) including two balancing valves (BV1, BV2) connected across diagonally opposite corners of the bed. The balancing valves (BV1, BV2) are so connected to their associated piston-and-cylinder arrangements (C1-C4) that during a cutting stroke they control the flow of exhaust fluid from said arrangements, while during a return stroke they control the flow of fluid supplied to said arrangements. In addition, the two sides of each piston-and-cylinder arrangement (C1-C4) are connected by a line in which is disposed a valve (CV13, CV23, CV33,CV34) which is closed during a cutting stroke of the press and open during a return stroke of the press, thereby enabling fluid exhausting from the one side of each arrangement during a return stroke to be admitted to the other side thereof.
IPC 1-7
IPC 8 full level
B26D 5/12 (2006.01); B30B 15/24 (2006.01)
CPC (source: EP)
B26D 5/12 (2013.01); B30B 15/24 (2013.01)
Citation (search report)
- FR 2082710 A5 19711210 - CHAPUIS SIMON
- GB 1128716 A 19681002 - PACIFIC PRESS & SHEAR CORP
- GB 1274082 A 19720510 - NIAGARA MACHINE & TOOL WORKS [US]
- US 3464320 A 19690902 - RICHARDSON ROLLAND A
- FR 2196861 A1 19740322 - USM CORP [US]
Designated contracting state (EPC)
DE GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 86304206 A 19860603; GB 8513955 A 19850603