METHOD FOR PRODUCING SEAMLESS HOT ROLLED TUBES WITH OUTER DIAMETER LESS THAN 170 MM Russian patent published in 1995 - IPC

Abstract RU 2036031 C1

FIELD: producing seamless tubes. SUBSTANCE: free of mandrel rod continuous tube rolling is carried out just before operation of continuous rolling on a mandrel rod and practically concurrently with mandrel rod insertion into a pierced work piece, but without contact- like interaction. Seamless mill and continuous on-mandrel rod rolling mill build a unit rolling system on the base of the same production line. EFFECT: high productivity. 2 cl, 9 dwg

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RU 2 036 031 C1

Authors

Rajmondo D'Avantso[It]

Dates

1995-05-27—Published

1990-11-29—Filed