EP 1302252 B1 20040901 - High performance bending machine with reduced energy dispersion
Title (en)
High performance bending machine with reduced energy dispersion
Title (de)
Hochleistungsbiegepresse mit verringertem Energieverlust
Title (fr)
Presse à plier à performance élevée avec perte d' énergie réduite
Publication
Application
Priority
JP 2001006636 U 20011011
Abstract (en)
[origin: EP1302252A1] A bending machine comprises a bending unit (8) moved by hydraulic actuators (12, 15) controlled by a variable displacement hydraulic pump (16) provided with an electronic closed-loop flow rate, pressure and power control system (25, 29, 35, 37, 39) including an electrically controlled proportional valve (25). The valve (25) includes a valve spool (26) for the control of the swivel angle of the pump (16) and a proportional solenoid (27) for moving the valve spool (26) to a position corresponding to a desired swivel angle of the pump (16). The control system (25, 29, 35, 37, 39) includes an inductive position transducer (35), a pump swivel angle transducer (37), a pump pressure transducer (39) and a programmed electronic control unit (29) which receives position, swivel angle and pressure signals (34, 36, 38) from said transducers (35, 37, 39) and predefined pressure, power and flow rate commands (30, 31, 32) and supplies a control signal (28) to said proportional solenoid (27). <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP KR US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
EP 1302252 A1 20030416; EP 1302252 B1 20040901; AT E275009 T1 20040915; CA 2397422 A1 20030411; DE 60201114 D1 20041007; DE 60201114 T2 20050901; ES 2227392 T3 20050401; JP 3085306 U 20020426; KR 100880244 B1 20090128; KR 20030030954 A 20030418; US 2003070463 A1 20030417
DOCDB simple family (application)
EP 02079123 A 20021004; AT 02079123 T 20021004; CA 2397422 A 20020809; DE 60201114 T 20021004; ES 02079123 T 20021004; JP 2001006636 U 20011011; KR 20020061835 A 20021010; US 26686202 A 20021008