METHOD FOR FORMING BLANKS AND PRESS FOR PERFORMING THE METHOD Russian patent published in 2003 - IPC

FIELD: plastic metal working. SUBSTANCE: forming press includes group of lower dies having stationary die and movable die turned to stationary die and spaced from it by some distance along axis of press and restricting volume for blank; and outer circumferential wall. Movable die has zone of basic level laying in plane of blank normal relative to axis of press and three rotatable symmetrical sectors raised over zone of basic level. Each sector is angular sector of disc and it is arranged at angular shift relative to other sectors. Mechanism of press includes axial drive for moving movable die in direction parallel relative to press axis and also drive for periodic circular feed for rotating movable die around axis of press by angle of periodical circular feed. At operation axial drive performs reciprocation motion, drive for periodical circular feed rotates die by angle less than sector angle while axial drive performs another stroke. At repeating such steps cyclic forming of the whole blank is realized. EFFECT: possibility for forming blank at nominal effort less than that during standard forming process. 17 cl, 11 dwg