DIE WITH BUILDUP ROLLERS FOR FORMING BY ROLLING AROUND Russian patent published in 1999 - IPC

FIELD: plastic metal working, namely manufacture of axially symmetrical products with stepped lateral surface. SUBSTANCE: apparatus includes punch mounted with possibility of rotation and axial motion relative to blank; stop mounted coaxially with punch with possibility of rotation and die with rollers arranged in parallel to blank axis with possibility of radial motion relative to blank axis and having discs mounted on common axle secured to housing. Each disc is mounted with possibility of autonomous rotation relative to other ones. EFFECT: enhanced quality of products due to rotation of each disc of buildup roller with its own angular velocity independently upon rotation speed of other discs of roller, elimination of slipping roller discs relative to lateral surface of blank. 1 dwg