Abstract: The drawing press according to the invention includes a support structure for supporting a metal sheet holder which is part of a tool and supported on the press frame via the support structure. The metal sheet holder is assigned a plunger with a die tool, whereas the plunger is moved by means of a plunger drive which includes a blocking position. The blocking position is obtained, for example, by a drive which, in the blocking position does not transmit any movement of the drive output to the driving servomotor. This can be achieved, for example, by an eccentric drive in the stretched position thereof. For performing the actual drawing stroke, the stamping tool is vertically movably supported. A carriage is raised or lowered by the press table by means of a table drive. As table drive, preferably a servomotor with a non-linear drive, such as an eccentric drive is used.

Abstract: The drawing press according to the invention includes a support structure for supporting a metal sheet holder which is part of a tool and supported on the press frame via the support structure. The metal sheet holder is assigned a plunger with a die tool, whereas the plunger is moved by means of a plunger drive which includes a blocking position. The blocking position is obtained, for example, by a drive which, in the locking position does not transmit any movement of the drive output to the driving servomotor. This can be achieved, for example, by an eccentric drive in the stretched position thereof. For performing the actual drawing stroke, the stamping tool is vertically movably supported. A carriage is raised or lowered by the press table by means of a table drive. As table drive, preferably a servomotor with a non-linear drive, such as an eccentric drive is used.

Abstract: The invention relates to a drawing press (10) having a first ram (17) and a second ram (18). The first ram (17) is moved in a working direction (A) by an electromotive first ram drive (25) and the second ram (18) by an electromotive second ram drive. The drawing press (10) also has a coupling means (35) which can be switched between an uncoupling state and a coupling state. In the uncoupling state, the two rams (17), (18) can move independently of one another in the working direction (A). In the coupling state, the coupling means (35) ensures that a relative movement between the two rams (17, 18) is prevented. The drawing press (10) can therefore be operated as a single-acting or double -acting press.

Abstract: A method of operating a servo press and apparatus therefore, including a press plunger and a servo drive and such a press, the press plunger is operated in accordance with a predetermined guide angle/position-curve based on a guide angle ? and the movement of the plunger is controlled in accordance with this curve with a tolerance which depends on the guide angle ?.

Abstract: The invention relates to a drawing press (10) having a first ram (17) and a second ram (18). The first ram (17) is moved in a working direction (A) by an electromotive first ram drive (25) and he second ram (18) by an electromotive second ram drive. The drawing press (10) also has a coupling means (35) which can be switched between an uncoupling state and a coupling state. In the uncoupling state, the two rams (17), (18) can move independently of one another in the working direction (A). In the coupling state, the coupling means (35) ensures that a relative movement between the two rams (17, 18) is prevented. The drawing press (10) can therefore be operated as a single-acting or double-acting press.

Abstract: The drawing press according to the invention includes a support structure for supporting a metal sheet holder which is part of a tool and supported on the press frame via the support structure. The metal sheet holder is assigned a plunger with a die tool, whereas the plunger is moved by means of a plunger drive which includes a blocking position. The blocking position is obtained, for example, by a drive which, in the locking position does not transmit any movement of the drive output to the driving servomotor. This can be achieved, for example, by an eccentric drive in the stretched position thereof. For performing the actual drawing stroke, the stamping tool is vertically movably supported. A carriage is raised or lowered by the press table by means of a table drive. As table drive, preferably a servomotor with a non-linear drive, such as an eccentric drive is used.

Abstract: A method of operating a servo press and apparatus therefore, including a press plunger and a servo drive and such a press, the press plunger is operated in accordance with a predetermined guide angle/position-curve based on a guide angle ? and the movement of the plunger is controlled in accordance with this curve with a tolerance which depends on the guide angle ?.

Abstract: In a press installation including a press with at least one press station and a multi-station press between arranged at a distance from each other which is a non-integral multiple of the press station distance of the multi-stage press. The installation also includes a transport arrangement for moving workpieces from press station to press-station concurrently by a step corresponding to the distance between the press station of the multi-station press. To compensate for an increased distance between the press station of the press and the adjacent press station of the multi-station press a deposit stage is arranged between the press and the multi-station press and includes a movable support an which the workpiece removed from the press can be deposited and from which, after appropriate movement of the support in the transport direction, it can be picked up by the transport arrangement for placement in the adjacent press station of the multi-stage press.

Abstract: In a press installation including a number of presses with servo-drives for operating the presses and auxiliary equipment such as workpiece handling devices wherein an energy management system is provided including a DC voltage intermediate circuit connected to a power supply grid via an AC/DC converter and to the servo-drives via servo-converters, a fly-wheel storage device is connected to the intermediate circuit for supplying energy thereto and recapturing energy therefrom under the control of a control arrangement which controls the flow of power between the intermediate circuit, the servo-drives, the fly-wheel storage device and the power supply grid.

Abstract: In a press installation including a press with at least one press station and a multi-station press between arranged at a distance from each other which is a non-integral multiple of the press station distance of the multi-stage press. The installation also includes a transport arrangement for moving workpieces from press station to press-station concurrently by a step corresponding to the distance between the press station of the multi-station press. To compensate for an increased distance between the press station of the press and the adjacent press station of the multi-station press a deposit stage is arranged between the press and the multi-station press and includes a movable support an which the workpiece removed from the press can be deposited and from which, after appropriate movement of the support in the transport direction, it can be picked up by the transport arrangement for placement in the adjacent press station of the multi-stage press.

Abstract: An arrangement and a method for the programming of presses is described. The programming is performed interactively by an input of points on a display screen, wherein the points determine the movement strategy x? (?). For calculating the resulting plunger-time curve or plunger-guide angle-curve, preferably a Fourier analysis or, respectively Fourier transformation and back transformation of the curve determined by the input values is performed. In this way, a smooth and well executed kinematics plunger movement is obtained.

Abstract: In a press installation including a number of presses with servo-drives for operating the presses and auxiliary equipment such as workpiece handling devices wherein an energy management system is provided including a DC voltage intermediate circuit connected to a power supply grid via an AC/DC converter and to the servo-drives via servo-converters, a fly-wheel storage device is connected to the intermediate circuit for supplying energy thereto and recapturing energy therefrom under the control of a control arrangement which controls the flow of power between the intermediate circuit, the servo-drives, the fly-wheel storage device and the power supply grid.

Abstract: In a transfer arrangement and method for transferring a workpiece between first and second spaced locations along a guide rail with a carriage movably supported on the guide rail, a transfer arm is pivotally supported on the carriage and carries at its free end a workpiece holder which is accelerated by the carriage with the arm essentially stretched out in the movement direction out of, and decelerated into, the end positions, and, in an intermediate position, the carriage movement is slowed down or even reversed while the workpiece holder is moved along by a pivot movement of the arm.

Abstract: In a transfer arrangement and method for transferring a workpiece between first and second spaced locations along a guide rail with a carriage movably supported on the guide rail, a transfer arm is pivotally supported on the carriage and carries at its free end a workpiece holder which is accelerated by the carriage with the arm essentially stretched out in the movement direction out of, and decelerated into, the end positions, and, in an intermediate position, the carriage movement is slowed down or even reversed while the workpiece holder is moved along by a pivot movement of the arm.

Abstract: A multistation press, particularly a suction device press, for machining sheet metal parts is provided for the successive machining of workpieces in several stages. Several press stations are arranged behind one another so that workpieces pass through the stations successively. At least one transfer device transports the workpiece. A common driving device for all press stations has a drive shaft divided into shaft sections. At least one press station is assigned to each shaft section. Slides are driven by the drive shaft and are assigned to one press station, respectively. An adjustable coupling is provided between two successively arranged shaft sections for adjusting a specific phase shift between two successive press stations.

Abstract: In a large-part transfer press, several forming stations are arranged below a common slide in order to minimize cost. The bedplate construction has two longitudinal or basic supports. On each support, one bedplate per forming station is transversely placed and fastened as required. Driving of the slide takes place by two mutually independent head pieces which, depending on the number of stations, are arranged side-by-side at a distance. Each of the head pieces spans only one forming station.