Abstract: A transfer device in a metal forming machine, particularly a transfer press, bulky-part transfer press, press facility and the like, is provided with a slide which can be moved up and down by means of driving devices for the metal forming of sheet metal parts 16, having sliding tables for the tool change, having a cam drive for a transfer movement of connecting rods to which travelling carriages 2, 15 are pivotally connected which travel on transfer rails 3. Two opposite travelling carriages 2, 15 respectively are connected with one another by means of at least one cross traverse 12. On each side, the cross traverse 12 is connected with the respective travelling carriages 2, 15 by way of a lifting and lowering device 1.

Abstract: A press is provided with gripping rails for moving workpieces in work stations. The press is provided with a motor and a shaft moved thereby, on which shaft cams are mounted. Swing levers follow the shape of the cams, and connecting tabs direct the movements of swing levers toward driving movements of the gripping rails. At least two rollers are rotatably mounted on swing levers. The rollers run on the shaft cams. At least one of the two rollers is pressable with zero play against one of cams by a pretensioning device.

Abstract: A method serves to actively perform vibration damping of driven elements of workpiece transport devices in and on shaping machines, especially presses and punches. A measured state value of the driven element or one reconstructed by an observer is determined. The state value is then entered into a damping regulator which affects the drive of the driven elements. A damping regulating circuit is provided in addition to a position regulating circuit.

Abstract: An arrangement is used for transferring workpieces through a succession of machining stations of a press, a simulator or similar machining or tool-setting machine. Two parallel transport rails are spaced at a distance from one another and can be moved by motors horizontally in their longitudinal direction, vertically up and down and optionally horizontally toward one another. The motors are arranged on one traverse respectively, the transport rail being hinged to the traverse. Between the transport rails and the motors arranged on the traverse, a compensating guide is provided for the horizontal movement of the transport rails. The compensating guide has at least two struts and a double-armed lug with three hinge points, each of the struts being mounted on the traverse side in a hinged manner at one point respectively.

Abstract: A process supplies energy to electronically controlled drives, particularly drives for workpiece handling devices, in and on a press having a press slide. The workpiece handling devices are electromechanically driven and electronically controlled. In the event of a power supply system outage, at least the workpiece handling devices are supplied at least for a short time by an intermediate circuit of a drive amplifier or an uninterruptable power supply system with voltage. Thereby, all devices important for the movement of the workpiece handling devices are supplied with voltage from the intermediate circuit or the uninterruptable power supply system.

Abstract: A coining press is provided with a machine frame, a coining drive for slides and coining dies, an ejector coining die against which the coining die can be pressed with the interposition of the coining blank and can partially yield for this purpose, a drive for the ejector movement of the ejector coining die and one device respectively for feeding the coining blank and for removing the finished coined part. The coining drive has a coupling dwell gear which is hinged to a toggle joint gear. The coupling dwell gear has a connecting rod moved by an eccentric shaft, the longitudinal axis of the connecting rod extending substantially in parallel to the coining plane and the end of the connecting rod facing away from the coining die being hinged to a booster device. The toggle joint gear has three pressure lugs which, on one end respectively, are hinged to one another on a pin while the end of a first pressure lug is hinged to the connecting rod.

Abstract: A method and an arrangement are used for transmitting data, signals and/or energy from stationary parts in or on metal-forming machines, particularly presses and/or stamping machines, or the environment to at least one sliding table and/or the transfer system of the metal-forming machine. For this purpose, a stationary device is provided as well as a movable device which complements the stationary device. The stationary device comprises at least one transmitter, a first coupler, a coupling loop, and a first antenna. The movable device, in each case, has at least one second transmitter and a second antenna. The stationary device and/or the movable device are arranged on base plates in this case.

Abstract: In the case of transfer presses and similar metal-forming machines, transfer devices must be provided for the transport of the sheet metal parts through the metal-forming stages. The lifting and lowering movement should be freely programmable, yet, a drive for the lifting and lowering movement is to be permitted which is free from play. This is achieved by the use of servo motors or similar motors with a hollow-shaft rotor and high-resolution position generators for the direct application on the transfer device, in which case the hollow-shaft rotor of each of the servo motors is provided with a spindle nut which, interacts with a spindle which is fastened on the transfer device in a non-rotatable manner.

Abstract: A multiple stand press or similar press facility for the forming of sheet metal parts has a bedplate, several press stands, and a press slide 7 which can be moved up and down by the press drive via drive gear boxes and connection rods. Tools in progressive stations follow a drawing station. In order to be able to reduce the size of the press facility, the press slide extends along at least two stand areas, and the introduction of force takes place via the connecting rods into the press slide in the stand areas.

Abstract: An arrangement for changing the lever ratio of a two-armed rocker lever, particularly for the transfer movements in a press. The rocker lever is pivotally connected in a lever arm and the starting movement is capable of being tapped by another lever arm. This arrangement includes a frame, a slide guide for the rocking bearing of the rocker lever, a control device, a rotation transmission device and a nut-spindle connection for the sliding movement of the slide guide relative to the rocker lever. The rocker lever, by means of the slide guide, is disposed in a pivot bearing of a support. The support is slidably guided in the frame. The support includes the nut of the nut-spindle connection for interacting with the spindle. The control device, rotation transmission device and the spindle are arranged in the frame, and a device for fixing the position of the pivot bearing in the rocker lever is connected with the rocker lever in an operatively connected manner.

Abstract: A press having a drawing apparatus has a sheet metal part that is drawn in the drawing stage. This sheet metal part is to be taken over by a transfer device in a stage of the upward movement of the drawing apparatus that is as early as possible in order to utilize the long time period of the upward movement of the slide for the transfer movement. After the drawing, passing through the lower dead center of the slide movement and the drawing apparatus movement, the sheet metal holder is temporarily stopped in a removal position and is therefore temporarily prevented from continuing to move upward.

Abstract: A drawing apparatus in drawing stages of a press, having a pressure cheek divided into segments, to the corner areas of which pressure cylinders are applied. The pressure cylinders are fixed to the press. Their piston rods, by way of pressure rods, act upon a liftable and lowerable console. At least one locking cylinder which is fixed to the frame is provided which, by way of a lift bridge, is applied to the console and, corresponding to the pressure which acts upon it, prevents an upward movement of the console and thus of the pressure cheek. The point in time of the stop stage in the upward-moving stage can be determined by the valve control of the pressure in the locking cylinders.

Abstract: In the case of a drive for a male-die-side ejector slidably disposed in a slide of a mechanical metal-forming press having an angle lever which is pivotably disposed at the slide, one leg of the lever acting upon the end of the ejector facing way from the male die and the other leg thereof being acted upon by a control cam which is driven in a timed manner and being held in contact with this control cam, a free adjustability of the moving characteristics of the ejector is achieved in that the control cam is provided at a control carriage which is slidable in a guide fixed at the frame in parallel to the moving direction of the slide, and at which a control connecting rod is applied in a bearing, this control connecting rod, at one end, being disposed eccentrically on a shaft serving also as the drive of the slide.

Abstract: A press drive with a central cam shaft actively connected through a connecting rod with a slide guided in a linear guide. Side bars are symmetrically articulated with respect to each other on the slide. Mass balancing weights are driven in opposed directions corresponding to reciprocating masses of the press, with the weights being connected with the slide by other linkages. Pairs of toggle joint linkages are disposed symetrically with respect to the cam shaft. The pairs of toggle joint linkages include a first almost horizontally disposed toggle joint linkage that is articulated on the respective side bars and presents a bearing point on the press frame. A second almost vertically disposed toggle joint linkage that is connected with the first toggle joint linkage and is articulated so as to be guided by the press frame on the mass balancing weight.