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2 015 755

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IPC

(21) (22)

Application

4938976/27, 1991-05-23

(22)

Actual filing date

1991-05-23

(45)

Published

1994-07-15

(72)

Inventor

Svidovskij F.G.Samusev S.V.Korobov S.A.Voronin L.M.

(73)

Holder

Vserossijskij Nauchno-Issledovatel'Skij, Proektno-Konstruktorskij I Tekhnologicheskij Institut Kabel'Noj Promyshlennosti

METHOD FOR COLD REDUCTION IN CROSS-SECTIONAL AREA OF WELDED PIPE PRODUCTS Russian patent published in 1994 - IPC

Abstract RU 2015755 C1

FIELD: production of pipes. SUBSTANCE: speed of rotation of rolls in first drive pass is set within range of minimum and maximum values determined by mathematic dependence on wall thickness, pipe speed and pass parameters. In so doing, in other successively located passes, the minimum rotation speed of rollers is taken equal to minimum speed of rotation of first pass, and this is used in calculation of roll diameters over groove bottom. EFFECT: preserved invariable thickness of pipe walls. 4 dwg, 1 tbl

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RU 2 015 755 C1

Authors

Svidovskij F.G.

Samusev S.V.

Korobov S.A.

Voronin L.M.

Dates

1994-07-15—Published

1991-05-23—Filed