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IPC

B21B25/04(2006-01-01)

(21) (22)

Application

2011100725/02, 2011-01-12

(24)

Start date

2011-01-12

(22)

Actual filing date

2011-01-12

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Published

2012-07-20

(72)

Inventor

Pyshmintsev Igor' Jur'EvichMul'Chin Vasilij Vasil'EvichKurjatnikov Andrej Vasil'EvichMikhajlov Sergej MikhajlovichLevchenko Dmitrij Anatol'EvichSapunov Sergej Jur'EvichKhudjakov Nikolaj KonstantinovichPluzhnikov Nikolaj StepanovichKorol' Aleksej ValentinovichKorsakov Andrej Aleksandrovich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Nauchno-Issledovatel'Skij Institut Trubnoj Promyshlennosti"

METHOD OF PRODUCING SLEEVES Russian patent published in 2012 - IPC B21B25/04

Abstract RU 2456102 C1

FIELD: process engineering.

SUBSTANCE: invention aims at improving quality of inner surfaces of tubes and sleeves in production of seamless hot-rolled tubes and sleeves at rotary piercer with cooled mandrel. Proposed method comprises piercing heated billet in rotary piercer with forced coolant feed on inner and outer surfaces. Note here that coolant is fed at overpressure.

EFFECT: higher wear resistance of mandrel.

1 ex

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RU 2 456 102 C1

Authors

Pyshmintsev Igor' Jur'Evich

Mul'Chin Vasilij Vasil'Evich

Kurjatnikov Andrej Vasil'Evich

Mikhajlov Sergej Mikhajlovich

Levchenko Dmitrij Anatol'Evich

Sapunov Sergej Jur'Evich

Khudjakov Nikolaj Konstantinovich

Pluzhnikov Nikolaj Stepanovich

Korol' Aleksej Valentinovich

Korsakov Andrej Aleksandrovich

Dates

2012-07-20—Published

2011-01-12—Filed