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2 428 272

(13)

(51)

IPC

B21F35/00(2006-01-01)

(21) (22)

Application

2010122778/02, 2010-06-03

(24)

Start date

2010-06-03

(22)

Actual filing date

2010-06-03

(45)

Published

2011-09-10

(72)

Inventor

Tebenko Jurij MikhajlovichZemljanushnova Nadezhda Jur'EvnaFadeev Viktor VladimirovichZemljanushnov Nikita Andreevich

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Nauchno-Proizvodstvennoe Ob"Edinenie Npo

METHOD OF SPRING RECOVERY Russian patent published in 2011 - IPC B21F35/00

Abstract RU 2428272 C1

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and may be used in repair of whatever machinery. Proposed method comprises expanding, heating and holding stretched spring till cooling. Spring heated to tempering temperature is expanded to coil pitch exceeding that of finished spring and tempered as-expanded till cooling. Then, spring is peen hardened and pressed by axial load making 10…300 F₃, where F₃ is spring force at maximum strain.

EFFECT: expanded performances, higher quality.

4 cl

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RU 2 428 272 C1

Authors

Tebenko Jurij Mikhajlovich

Zemljanushnova Nadezhda Jur'Evna

Fadeev Viktor Vladimirovich

Zemljanushnov Nikita Andreevich

Dates

2011-09-10—Published

2010-06-03—Filed