FIELD: process engineering.
SUBSTANCE: proposed workpiece comprises cylindrical central body with one end open and closed opposite end. Closed end central section has additional hollow element extending from the workpiece to accommodate workpiece drawing bar end. Said hollow additional element and remaining side section of workpiece end may be spherical, conical, elliptical or parabolic.
EFFECT: higher physical properties and decreased weight.
7 cl, 1 dwg
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