WATER-COOLED MANDREL OF PIERCING MILL Russian patent published in 2024 - IPC B21B25/04 B21B19/04

Abstract RU 2819688 C1

FIELD: various technological processes.

SUBSTANCE: invention relates to a water-cooled mandrel of a piercing mill of screw rolling, which is installed on a tip of a hollow rod containing a tube for supply of cooling liquid. Mandrel is made with cavity of variable cross-section in shape coaxially to outer surface of mandrel so that cavity diameter increases towards rod. Mandrel is equipped with frame arranged in mandrel wall, which is formed by a set of annular elements increasing in diameter towards the rod coaxially to the outer surface of the mandrel, and longitudinal ribs connecting said rings.

EFFECT: as a result, the mandrel resistance is increased.

1 cl, 4 dwg, 1 ex

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RU 2 819 688 C1

Authors

Akimenko Sergej Viktorovich

Romantsev Boris Alekseevich

Dates

2024-05-22—Published

2023-10-23—Filed