FIELD: plastic metal working, possibly manufacture of ring blanks by expansion.
SUBSTANCE: method comprises steps of placing blank between central and pressure rolls and two stop rollers; arranging stop rollers symmetrically relative to deformation plane that passes through axes of central and pressure rolls; determining arrangement of outer cylindrical surface of ready article; providing engagement of stop rollers and outer surface at predetermined effort directed along lines normal to outer cylindrical surface of ready article while arranging normal lines by angle relative to deformation plane; inclining normal lines by predetermined angle selected in range given in claims of invention; at expanding and sizing operations, arranging stop rollers with possibility of displacing them from deformation plane.
EFFECT: enhanced accuracy of articles due to lowered out-off-roundness of blanks, reduced vibration of blanks and apparatus.
3 dwg
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RU2194589C2 |
