METHOD FOR MAKING BENT ROLLED BARS Russian patent published in 2000 - IPC

Abstract RU 2148450 C1

FIELD: plastic metal working, namely production of rolled bent bars. SUBSTANCE: method comprises steps of bending up portions of strip blank in rough, intermediate, prefinal and final passes with formation of two semicircular corrugations in base of bar; beginning formation of corrugations in last prefinal pass until height value equal to 0.7-0.85 of their predetermined height; completing formation of corrugations in second final pass at keeping the same length of arc of cross section of corrugations in both said passes; disengaging tools with corrugations in second prefinal and all final passes except second final pass. EFFECT: enhanced quality of rolled bent bar due to its improved geometry and prevention of cracking at shaping. 2 cl, 1 dwg, 1 ex

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RU 2 148 450 C1

Authors

Rashnikov V.F.

Antipanov V.G.

Gridnevskij V.I.

Gushchin A.I.

Pakharev V.V.

Afanas'Ev V.F.

Dates

2000-05-10Published

1998-12-08Filed