METHOD AND APPARATUS OF BEARINGS COILED SEMIRETAINERS PRODUCTION Russian patent published in 1996 - IPC

FIELD: metals machining, bearings coiled semiretainers production in particular. SUBSTANCE: two ring-type blanks are cut out of band so, that inner diameter of one (outer) blank is equal to outer diameter of another (inner) blank. Then each blank is bent to produce uniform number of corrugations. Corrugations depth of outer blank is increased as compared with corrugations depth of inner blank by value, that after bending provides equality of outer diameters of both blanks. Apparatus has multiposition press with row of setting holes, several per operation stamps and grab of blanks step by step motion. Setting holes, per operation stamps and grab catching teeth are divided for two groups. Each group setting holes number exceeds the group stamps number by one. Grab additionally has pairs of pins-pushers. EFFECT: increased productivity. 2 cl, 5 dwg