Abstract: The device serves to receive a tool for calibrating of workpieces (83), preferably workpieces manufactured by a powder metallurgical process. On the example shown the tool comprises the lower stamps (77, 78, 79) and the upper stamps (80, 81, 82) located on tool supports (31, 32, 33; 31?, 32?, 33?). These stamps may be moved up and down individually or together parallel to the axis (40). Also movable up and down is the tool support (41) on which, if required, a center pin (85) is mounted. The device is particularly suitable for the calibration of complicated workpieces, such as represented for example by the workpiece (83) having the form of a body of rotation.

Abstract: The device serves to receive a tool for calibrating of workpieces (83), preferably workpieces manufactured by a powder metallurgical process. On the example shown the tool comprises the lower stamps (77, 78, 79) and the upper stamps (80, 81, 82) located on tool supports (31, 32, 33; 31?, 32?, 33?). These stamps may be moved up and down individually or together parallel to the axis (40). Also movable up and down is the tool support (41) on which, if required, a center pin (85) is mounted. The device is particularly suitable for the calibration of complicated workpieces, such as represented for example by the workpiece (83) having the form of a body of rotation.

Abstract: To form and compact a powdered metal workpiece (W) having an outer spiral circumference, for example a helical gear, the apparatus has a press mold (21) in a compaction press. This mold can be used for manufacture or for sizing or calibrating workpiece dimensions. A first rotatable and axially movable plunger, punch or ram (16) is movable towards the press mold, and a second rotatable or axially movable plunger or punch or ram (27) is movable through the press mold. To ensure and control rotation of the first (16) plunger, a helical cam system (13, 15) formed by a core element (15) having a spiral outer contour in engagement with a matrix or nut element (13) is provided, the system being coupled to the first plunger (16) by a gear transmission (11, 12) coupled to the matrix element and to the first plunger, punch or ram (16).

Abstract: In a press having an upper punch and lower punch and a tool mount to be inserted into the press and connected to the lower punch via a lower coupling plate and to the upper punch via an upper joining piece, and a framework mounted displaceably on a base plate of the mount and consisting of connecting rods rigidly connecting the lower coupling plate with the matrix holding plate, die carriers being moved relative to the base plate from their filling position downward into the compacting position and from the compacting position into the ejecting position, which corresponds to the filling position (the so-called ejection method), at lease one additional die carrier, like the matrix holding plate, works by the withdrawal method, this die carrier being moved from the filling position downward into the compacting position and from the compacting position downward into the withdrawing position.