TOOL FOR RING TYPE BLANKS ROLLING OUT Russian patent published in 1997 - IPC

FIELD: metals mechanical shaping, that is production of free forging tools used in forging during ring type blanks rolling out. SUBSTANCE: tool for ring type blanks rolling out is made in the form of mandrel made of shaped and cylindrical sections. Working surface of shaped section has pattern in the form of gauze with protrusions height in limits from 0.005 to 0.01 and linear dimensions of gauze cell in limits from 0.02 of mandrel flat cylindrical section diameter. Gauze presence on tool allows to avoid blank sliding during its turning after each single reduction. So rolling out duration is decreased, operations of rolling out and butts upsetting are joined for one heat, that allows to save power for heating. Rational form of tool working section allows to avoid appearance of surface cracks, that increases quality of forging product and also raises process productivity due to avoiding operation of mandrel change during final finishing stages of rolling out. EFFECT: decreased rolling out duration, power consumption, number of working operations, increased quality and productivity. 3 dwg, 1 tbl