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2 314 174

(13)

(51)

IPC

B21D41/00(2006-01-01)

C21D9/06(2006-01-01)

(21) (22)

Application

2006109856/02, 2006-03-27

(24)

Start date

2006-03-27

(22)

Actual filing date

2006-03-27

(45)

Published

2008-01-10

(72)

Inventor

Shirjaev Dmitrij AleksandrovichRozdol'Skaja Ol'Ga VladimirovnaGlukhov Nikolaj Petrovich

(73)

Holder

Federal'Noe Gosudarstvennoe Unitarnoe Predprijatie Proizvodstvennoe Ob"Edinenie Zavod"

TUBULAR ARTICLE CALIBRATION METHOD Russian patent published in 2008 - IPC B21D41/00 C21D9/06

Abstract RU 2314174 C1

FIELD: plastic working of metals, possibly calibration of tubular articles of martensite aging steels.

SUBSTANCE: method comprises steps of preliminary calibrating blank due to cyclic successive heating of blank till quenching temperature and cooling blank in order to provide blank diameter satisfying to relation given in specification; then performing combined heating of blank and plug till temperature of aging blank material, soaking it and cooling; using plug made of material whose linear expansion factor exceeds that of blank material.

EFFECT: enhanced accuracy of tubular article calibration.

4 cl, 2 dwg, 1 tbl, 1 ex

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RU 2 314 174 C1

Authors

Shirjaev Dmitrij Aleksandrovich

Rozdol'Skaja Ol'Ga Vladimirovna

Glukhov Nikolaj Petrovich

Dates

2008-01-10—Published

2006-03-27—Filed