FIELD: metallurgy.
SUBSTANCE: prior to forming the radial outer surface of the tubular blank and a conical portion snap antifriction coating is applied. As deforming medium is gas or high temperature flexible liquid container. During radial moulding is carried out heating the tubular workpiece to a temperature of 60-70% of the melting temperature of the material of the tubular blank, and regulate the pressure applied to the distorting medium.
EFFECT: reduced thinning of the wall parts.
3 cl, 18 dwg
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