ROLLING STAND OF MILL FOR COLD ROLLING OF TUBES Russian patent published in 1999 - IPC

FIELD: mills for cold rolling of tubes, namely working stands of such mills. SUBSTANCE: working stand of mill for cold rolling of tubes includes crank drive mechanism, stationary housing with two upper and two lower supporting rails, cartridge joined with drive mechanism and having two rolling rolls with supporting necking portions and one backup roll at each side of central groove of rolling roll. Novelty is additional backup rolls engaging as above mentioned backup rolls with respective necking portion of rolling roll and supporting rail. Initial and Additional backup rolls are mounted in pairs in common casing with possibility of separate rotation and self-alignment together with common casing in gap between supporting rail and necking portion. EFFECT: lowered pressure in bearing assemblies of rolling stand, increased service life period of bearing assemblies. 3 dwg