METHOD OF ASYMMETRIC COLD ROLLING OF PIPES Russian patent published in 2010 - IPC B21B21/00 

Abstract RU 2401170 C1

FIELD: metallurgy.

SUBSTANCE: proposed method comprises machining of billet on mandrel in multiple repeated cycles each comprising feeding the billet along rolling axis into revolving- and translating-roll stands, deformation in variable-section gages and rolls revolving and flat-and-back stripping. Billet is deformed on rolls with different length of working sections. Rolls runs at different speeds. Relation between roll working sections is directly proportional to that of roll speeds and makes 1.02 to 1.06.

EFFECT: reduced maximum load of mill structural elements, higher accuracy of sizes.

2 dwg

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RU 2 401 170 C1

Authors

Churbanov Valentin Igorevich

Barichko Boris Vladimirovich

Vydrin Aleksandr Vladimirovich

Dates

2010-10-10Published

2010-01-25Filed