METHOD OF MAKING ROD PRODUCTS, HAVING END FLANGE AND BEAD IN THEIR MEAN PORTION AND APPARATUS FOR PERFORMING THE METHOD 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, into a lower die-half, having a through groove with cavities for a bead and a flange; by action of an effort of the press clamping the blank in its portion between the bead and the flange; performing upsetting of the end flange in a clamping groove of an assembly of the die-halves, being moved one opposite to another; simultaneously acting upon the other end of the blank by a flat upsetting punch, mounted in a slider, being moved along a lower plate with the aid of an additional wedge, mounted on an upper plate. An inclination angle of an additional wedge is more, than an inclination angle of main wedges, and in the result the upsetting punch and the die-halves perform different motions. Due to different motions of these unit members the bead in the mean portion of the rod blank is being formed by extrusion of the blank material with the aid of the punch into the cavity of the assembly of the die-halves. EFFECT: enhanced efficiency. 3 cl, 4 dwg