METHOD FOR BENDING THIN-WALL TUBES Russian patent published in 2003 - IPC

Abstract RU 2209698 C1

FIELD: tube forming processes, namely bending thin-wall tubes. SUBSTANCE: method comprises steps of bending-shaping tube at performing preliminary deformation of its cross section in range 3 -10% in bending zone until forming ellipse whose large axis is arranged in bending plane; then bending tube until predetermined values of its radius and bending angle. Method provides out-off-roundness of tube in cross section no more than 5%. EFFECT: enhanced quality of bent tubes. 3 dwg

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RU 2 209 698 C1

Authors

Fomin M.Z.

Varavin I.I.

Chernjavskij S.A.

Rebrov A.I.

Zimnukhov V.A.

Dates

2003-08-10—Published

2002-01-03—Filed