FIELD: metallurgy.
SUBSTANCE: invention can be used to form integral sheet thin-walled shells of axially symmetric shape from sheet blanks having constant thickness along the generatrix which is described by sections of second-order curves. The rotational extraction is carried out per one transition for several successive straight and reverse passes without taking into account temperature deformations.
EFFECT: prevention of temperature deformations against heating of process mandrel.
1 dwg
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