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IPC

B21F35/00(2006-01-01)

C21D9/02(2006-01-01)

F16F1/06(2006-01-01)

(21) (22)

Application

2015103577/02, 2015-02-03

(24)

Start date

2015-02-03

(22)

Actual filing date

2015-02-03

(45)

Published

2016-05-10

(72)

Inventor

Kutergin Vladimir AlekseevichEvsjagin Valerij AnatolevichStolov Artem Aleksandrovich

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennostju

METHOD OF PRODUCING SPRINGS FROM STEEL Russian patent published in 2016 - IPC B21F35/00 C21D9/02 F16F1/06

Abstract RU 2583561 C1

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used for production of springs of steel by hot winding. Method comprises billet heating to temperature above point of AC₃, holding at temperature above point of AC₃, billet winding into coil at temperature above point of AC₃, spiral cooling to temperature of martensitic transformation and tempering. Blank heating is carried out in two stages, between which workpiece is held at temperature below point AC₁ for period of time providing alignment of temperature in cross section of billet.

EFFECT: reduced time of homogenising tempering, which reduces grain growth in production of spring by heating billet in several stages.

2 cl

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RU 2 583 561 C1

Authors

Kutergin Vladimir Alekseevich

Evsjagin Valerij Anatolevich

Stolov Artem Aleksandrovich

Dates

2016-05-10—Published

2015-02-03—Filed