Patent ID: 7752878

Claim:
A press installation ( 1 ), particularly for forming large parts, comprising: a number of presses ( 2 , 3 , 4 ) representing different press stages, each including a stationary press table ( 14 - 16 ), a plunger ( 5 , 6 , 7 ) movable relative to the press table ( 14 - 16 ) and a servo-drive ( 8 - 13 ) for operating the presses ( 2 , 3 , 4 ); a parts transport arrangement ( 22 ), with workpiece engagement structures ( 23 , 24 ) for moving workpieces into and out of the presses ( 2 , 3 , 4 ) and a servo-drive ( 20 , 21 ) for operating the transport arrangement; a DC voltage intermediate circuit ( 34 ) connected to a power supply grid ( 46 ) via an AC/DC converter ( 45 ) and to the servo-drives ( 8 - 13 , 20 , 21 ) via servo converters ( 28 - 33 ); a fly-wheel storage device ( 48 ) including a motor ( 49 ) operatively connected to a fly-wheel ( 50 ), the motor ( 49 ) connected to the DC intermediate circuit ( 34 ) via a voltage converter ( 52 ) for supplying energy to the DC intermediate circuit ( 34 ) and for recapturing excess energy therefrom; and, a control arrangement ( 35 ) connected to the converters ( 45 , 28 - 33 , 52 ) for controlling the flow of power between the DC intermediate circuit ( 34 ) and the servo-drives ( 8 - 13 , 20 , 21 ), the fly-wheel storage device ( 48 ) and the power supply grid ( 46 ).