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2 040 996

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C1

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IPC

(21) (22)

Application

5062502/08, 1992-09-18

(22)

Actual filing date

1992-09-18

(45)

Published

1995-08-09

(72)

Inventor

Antipanov V.G.Gridnevskij V.I.Afanas'Ev V.F.Pakharev V.V.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa Metallurgicheskij Kombinat"

METHOD OF MAKING BENT CHANNEL SECTIONS Russian patent published in 1995 - IPC

Abstract RU 2040996 C1

FIELD: metal pressure forming. SUBSTANCE: method, comprising steps of successive bending up of a strip blank by rolls in rough, intermediate and prefinal passes with formation of a web and of flanges, having different length values; passing the strip to be formed between vertical rollers, also includes steps of bending at first prefinal pass a half of the web, joined with a large flange, by rotating it clockwise in a vertical plane by an angle γ, equal to 8-10 degrees, and at second prefinal pass returning this portion of the web to its initial position with simultaneous rotation of its second half by the same angle counterclockwise at bending up a small flange and folding the large flange of the section by the angle g; after each intermediate pass upon passing the strip between the vertical rollers providing contact of its large flange with use of a roller, having a cone surface with inclination angle, being more, than an angle of folding the flange. EFFECT: enhanced quality of bent channel sections, lowered labor consumption for their production. 1 cl, 2 dwg

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RU 2 040 996 C1

Authors

Antipanov V.G.

Gridnevskij V.I.

Afanas'Ev V.F.

Pakharev V.V.

Dates

1995-08-09—Published

1992-09-18—Filed

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