A bending machine for bending workpieces is disclosed. The bending machine includes a lower beam and an upper beam for forming a workpiece by bending along a bending line. A tool holder for receiving bending tools is provided on the lower beam and each end of the tool holder is associated with a recessed region which is formed in the lower beam overlapping with the respective end. The lower beam includes a central element and at least one side element arranged adjacent to one another in the thickness direction of the lower beam. Recessed regions are provided in the central element and/or in the width direction adjacent to the central element. The lower beam also includes a central region in which, during a bending operation of a workpiece, a force is introduced via the tool holder both into the central element and into the at least one side element.

A press for pre-sintering or sintering silicon wafers that has a lower block and an upper block is provided. The lower block has a lower base and a lower plate. The lower plate rests exclusively on a top surface of a body of at least three compression load cells. The load cell bodies are supported by the lower base so that the top surfaces are substantially coplanar with each other.

A press (1) is described, for molding an ingot made of thermoplastic or thermosetting material, comprising a basement (10) integral with risers (20), a first and a second plane (30, 40) relatively sliding with respect to the risers (20), by means of first and second hydraulic cylinders (50, 60), respectively adapted to allow opening and closing a mold formed of a first half-mold fastened to the first plane (30) and a second half-mold fastened to the second plane (40), comprising actuators (70) adapted to exert a force whose direction is equal to or opposite with respect to the direction of the force adapted to allow opening or closing the mold; the first plane (30) connected to the basement (10) is moved by means of the first hydraulic cylinders (50) and of the actuators (70), while the second plane (40) is blocked by means of a blocking apparatus (80).

A slide motion control apparatus for a mechanical press comprising: a slide which is disposed so as to be relatively vertically movable with respect to a driven body to which a drive force is transmitted through a con rod of the mechanical press; a relative position commander that outputs a relative position command indicating a relative position of the slide with respect to the driven body; a relative position detector that detects a relative position of the slide with respect to the driven body, and outputs a relative position detecting signal indicating the detected relative position; a servomotor; a drive mechanism that relatively moves the slide with respect to the driven body by a drive force of the servomotor; and a controller that controls the servomotor based on a relative position command signal output from the relative position commander, and the relative position detecting signal output from the relative position detector.

A die assembly for use in a stamping press is provided. The die assembly includes a first die plate, a first curved die stiffener, and a first die shoe. The first die plate may be configured to form at least a portion of material into a desired configuration. The first curved die stiffener may be affixed to the first die plate on a first curved side of the first curved die stiffener. The first die shoe may be affixed to a second side of the first curved die stiffener. The first die shoe may be operatively configured to be mounted on a first press base.

A numerical controller drives, through pressure control, two motors which drives two tables of a driving apparatus while keeping these two tables parallel with each other. When there is a positional deviation between the two motors, the numerical controller calculates a correcting pressure based on correction gains indicating relationships between pressure and position stored in advance and corrects pressure command values of the two motors based on the correcting pressure.

The invention relates to a powder press having preferably a plurality of stamps (11) which are movable for a transverse press in a feed housing (10), said stamps partially delimiting a hollow chamber of a matrix in the feed housing (10) and being able to be coupled to a press device (40) by one connector piece each. An adjustable positioning means, which is formed from a wedge arrangement (20) having a stop surface (22) and placed crosswise to the moving direction of the stamp (11) is allocated to the respective stamp (11) for determining the pressing position thereof. Said wedge arrangement (20) comprises at least one wedge (21), which is adjustable crosswise to the moving direction of the stamp (11) and has the stop surface (22), which contacts a stop surface (11) at the stamp (11). Such a wedge arrangement can achieve very accurate pressing positions of the stamp, first of all, and extremely stable positioning of the stamp to be pressed with high pressure, second of all.

A press comprises a press frame, at least one upper punch plate with at least one upper press punch held on it and/or at least one lower punch plate with at least one lower press punch held on it. A die plate has at least one receiver for powdered material to be pressed by the press punches. At least two upper drives are mechanically coupled in the operation of the press, engaging at the upper punch plate for moving the upper press punch in the vertical direction and/or at least two lower drives mechanically coupled in the operation of the press, engaging on the lower punch plate and/or the die plate for moving the lower press punch and/or the die plate in the vertical direction. A method for setting up and operating the press for producing a pellet made of the powdered material, in particular metal powder, is described.

The invention relates to a method for compensating deviations in a deforming operation between two beams of a press, comprising of arranging one or more compensating element at a suitably chosen location in the press, detecting the deviations and moving the compensating element(s) relative to the beams by (electro) mechanical means during the deforming operation such that the detected deviations are compensated.

The compensating elements can be moved here to an over-compensating position prior to the deforming operation and pressed out of their over-compensating position during the operation by the load on the beam, wherein each compensating element exerts an adjustable resistance force on surrounding parts of the press.

It is conversely possible for the compensating elements each to be pressed stepwise to a position compensating the detected deviations during the deforming operation.

It is possible to use (piezoelectric) actuators to exert the resistance force and/or to move the compensating elements.

The invention further relates to a device with which this compensation method can be performed.

A slide motion control apparatus for a mechanical press comprising: a slide which is disposed so as to be relatively vertically movable with respect to a driven body to which a drive force is transmitted through a con rod of the mechanical press; a relative position commander that outputs a relative position command indicating a relative position of the slide with respect to the driven body; a relative position detector that detects a relative position of the slide with respect to the driven body, and outputs a relative position detecting signal indicating the detected relative position; a servomotor; a drive mechanism that relatively moves the slide with respect to the driven body by a drive force of the servomotor; and a controller that controls the servomotor based on a relative position command signal output from the relative position commander, and the relative position detecting signal output from the relative position detector.