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2 268 798

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IPC

B21B25/00(2006-01-01)

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Application

2004103233/02, 2004-02-04

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Start date

2004-02-04

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Actual filing date

2004-02-04

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Published

2006-01-27

(72)

Inventor

Saf'Janov Anatolij Vasil'EvichVol'Berg Isaak IosifovichSokolinskij Boris JakovlevichLapin Leonid Ignat'EvichRomantsov Igor' AleksandrovichKlimov Nikolaj PetrovichLogovikov Valerij AndreevichVlasov Lev Anatol'EvichBusuev Vladimir FedorovichSulatskov Viktor IvanovichZykova Natal'Ja BorisovnaBalandina Nadezhda Aleksandrovna

(73)

Holder

Oao Truboprokatnyj Zavod"

MANDREL FOR PILGER ROLLING OF HOT ROLLED TUBES Russian patent published in 2006 - IPC B21B25/00

Abstract RU 2268798 C2

FIELD: rolled tube production, namely designs of manufacturing tools such as mandrels for pilger rolling of hot rolled tubes.

SUBSTANCE: mandrel for pilger rolling of tubes includes locking, working and guiding portions and it is made of heat- and wear-resistant steel with linearly increased forging reduction from guiding to locking portion. Guiding portion consisting 0.3 - 0.35 of total length of mandrel is made of steel with less heat resistance subjected to the same heat treatment and having almost the same linear expansion factor as steel of other portions.

EFFECT: low cost of mandrels for pilger rolling of large- and mean-diameter hot rolled tubes due to making guiding portion of mandrel of steel with less heat resistance and less cost, lowered cost of conversion process of hot rolled tubes in tube rolling aggregates with pilger mills.

3 cl, 1 dwg

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RU 2 268 798 C2

Authors

Saf'Janov Anatolij Vasil'Evich

Vol'Berg Isaak Iosifovich

Sokolinskij Boris Jakovlevich

Lapin Leonid Ignat'Evich

Romantsov Igor' Aleksandrovich

Klimov Nikolaj Petrovich

Logovikov Valerij Andreevich

Vlasov Lev Anatol'Evich

Busuev Vladimir Fedorovich

Sulatskov Viktor Ivanovich

Zykova Natal'Ja Borisovna

Balandina Nadezhda Aleksandrovna

Dates

2006-01-27—Published

2004-02-04—Filed