FIELD: process engineering.
SUBSTANCE: invention relates to metal forming, particularly, to production of tubes. Forming assembly comprises cylinder to generate working force and pressure feed system with control elements. Said cylinder may be fitted inside the rube to displace therein. Note here that said forming element is composed of metal membrane engaged with one or several forming annular ledges. Note also that said metal membrane is secured to cylinder body to bend outward at pressure so that said annular ledges turn to penetrate into tube from inside.
EFFECT: expanded performances.
2 dwg
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