METHOD AND APPARATUS FOR MAKING ROD PRODUCTS, HAVING END FLANGE AND BEAD IN THEIR MEAN PORTION Russian patent published in 1995 - IPC

FIELD: metal pressure forming. SUBSTANCE: method comprises steps of placing a blank, had been heated up to a forging temperature, in a through groove of a connectable die; performing radial extrusion of the blank with applying of deforming efforts at two sides by two punches; performing formation of a flange by moving the die opposite relative to motion direction of the first upsetting punch; performing formation of a bead by motion of the second punch in a direction, identical with the motion direction of the die. The apparatus for performing the method includes a lower plate, an upper plate, having a multiple-inlet wedge for clamping and moving the die assembly, a device for returning an upper part of the die assembly in its initial position. The lower plate is provided by two sliders, supporting the punches, mounted in them. The upper plate has two wedges for moving the sliders with the punches, being moved one towards another with different speed values and along different distances, depending upon an inclination angle of the wedges. At this operation a motion of one punch coincides with the motion of the die. The other punch moves towards the die. EFFECT: enlarged manufacturing possibilities of the method. 3 cl, 4 dwg