METHOD FOR RADIAL HAMMERING Russian patent published in 1994 - IPC

FIELD: hammering. SUBSTANCE: blank is simultaneously effected by pairs of block heads in radial and tangential directions at least in two sections. The sections are located along the blank axis at a distance equal to the block head width. A torsion force is applied to the blank zone positioned between these sections. This is achieved by pairs of block heads acting on the blank, the block heads move in opposite directions along circular arcs centered on the blank axis. Moreover, the pairs of block heads may have tapered working surfaces, the working surfaces of one pair of block heads are inclined opposite to the working surfaces of the block heads of the other pair. EFFECT: improved structure. 3 cl, 2 dwg