FIELD: plastic working of metals, namely manufacture of large -diameter tubes.
SUBSTANCE: apparatus includes roll grooved pass, cone mandrel and outer outlet guide spaced by distance 1400 - 1500 mm from axis of mill. Front end of mandrel is in the form of stem onto which sleeve selected out of set of removable cylindrical sleeves is fit. Length of each sleeve is equal to 650 mm; its outer diameter is less than inner diameter of rolled tube by 0.5 - 1.0 mm.
EFFECT: improved operational reliability of apparatus.
1 dwg, 1 tbl
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