FIELD: plastic working of metals, possibly manufacture of annular blanks of parts such as races of bearings.
SUBSTANCE: method comprises steps of punching central portion of blank for making preliminary opening less than opening of ready part; placing blank between die and punch and drawing it at stretching said opening; selecting size of flat blank according to calculated condition for making two blanks; before drawing forming in flat blank preset shaped profile of parts and performing drawing in the form of U-shaped circular profile; dividing parts by removing excess material.
EFFECT: increased factor of using material, lowered labor consumption, improved accuracy of formed parts.
3 dwg, 1 ex
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