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2 497 613

(13)

(51)

IPC

B21B25/04(2006-01-01)

(21) (22)

Application

2012111293/02, 2012-03-23

(24)

Start date

2012-03-23

(22)

Actual filing date

2012-03-23

(45)

Published

2013-11-10

(72)

Inventor

Vydrin Aleksandr VladimirovichKurjatnikov Andrej Vasil'EvichZvonarev Dmitrij Jur'EvichKorol' Aleksej ValentinovichKorsakov Andrej Aleksandrovich

(73)

Holder

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

SCREW ROLLING MILL MANDREL ASSEMBLY Russian patent published in 2013 - IPC B21B25/04

Abstract RU 2497613 C1

FIELD: process engineering.

SUBSTANCE: proposed assembly comprises cooled mandrel with blind inner surface. Mandrel assy damage is ruled out and sleeve inner surface quality is increased by setting the mandrel at hollow nozzle locked at hollow rod furnished with feed pipe and telescopic pipe fitted therein. Flange is rigidly secured at feed pipe end facing the mandrel. Limiting elements are locked at telescopic pipe ends. Note here that limiting elements locked at telescopic pipe end facing the mandrel is composed of lock ring while that located at opposite end is composed of thrust washer. Compression spring is arranged in clearance between feed pipe and telescopic pipe.

EFFECT: higher durability of piercing mandrels.

3 dwg

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RU 2 497 613 C1

Authors

Vydrin Aleksandr Vladimirovich

Kurjatnikov Andrej Vasil'Evich

Zvonarev Dmitrij Jur'Evich

Korol' Aleksej Valentinovich

Korsakov Andrej Aleksandrovich

Dates

2013-11-10—Published

2012-03-23—Filed