METHOD FOR MAKING HIGH ACCURACY SHAPES OF MANIFOLD PIPELINES Russian patent published in 2000 - IPC

Abstract RU 2156666 C1

FIELD: plastic metal working, namely manufacture of high-accuracy trapezoidal sections with one symmetry axis from ferrous and non-ferrous metals, possibly shaped precision sections. SUBSTANCE: method comprises steps of shaping round blank in rough and prerough three-roll grooved passes and in final four-roll passes in such a way that in rough pass initial blank is deformed to arrow-shaped triangle whose all lateral sides are formed by joining curvilinear and straight portions placed respectively near large and small base of blank, curvature radius centers of curvilinear portions are placed on straight line crossing angles of joining of lateral faces with large base. EFFECT: minimized number of rolling passes for making high-accuracy shaped manifold sections with minimum labor consumption, enlarged manufacturing possibilities, namely rolling high accuracy trapezoidal sections. 6 dwg

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RU 2 156 666 C1

Authors

Panov V.V.

Dukmasov V.G.

Tergoev G.I.

Barichko B.V.

Dates

2000-09-27—Published

1999-05-17—Filed