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2 532 610

(13)

(51)

IPC

B21B17/00(2006-01-01)

(21) (22)

Application

2013114952/02, 2013-04-03

(24)

Start date

2013-04-03

(22)

Actual filing date

2013-04-03

(45)

Published

2014-11-10

(72)

Inventor

Zarudnyj Vladimir SemenovichLarikov Vladimir Vasil'EvichKazakevich Igor' IllarionovichShelement'Ev Vladimir AleksandrovichFominykh Evgenij Nikolaevich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Zavod Tjazhelogo Mashinostroenija"

PIPE ROLLING AT REDUCE-AND-STRETCH MILL Russian patent published in 2014 - IPC B21B17/00

Abstract RU 2532610 C1

FIELD: process engineering.

SUBSTANCE: proposed method comprises deformation of hollow billet by rolls at mill stand mandrel. Decrease in the length of sections with transient mode of stretching by creation of required braking ultimate force at first mill stand is ensured by straining of hollow blank at fist mill stand at short cylindrical mandrel. Reduction of wall at first mill stand at stationary mode at mandrel cylindrical section is specified by mathematical relationship.

EFFECT: decreased end wastes at pipe rolling.

2 dwg

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RU 2 532 610 C1

Authors

Zarudnyj Vladimir Semenovich

Larikov Vladimir Vasil'Evich

Kazakevich Igor' Illarionovich

Shelement'Ev Vladimir Aleksandrovich

Fominykh Evgenij Nikolaevich

Dates

2014-11-10—Published

2013-04-03—Filed