FIELD: process engineering.
SUBSTANCE: invention relates to metal forming, particularly, to production of tubes. Device housing has axial and radial channels to feed working fluid and radial cylindrical grooves communicated with the latter to make hydraulic cylinders with plungers fitted therein. Said plungers are furnished with shaped wedge-like punches and return springs. Said shaped punches may be replaced.
EFFECT: expanded performances.
3 dwg
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