STEPPED ROLLING METHOD Russian patent published in 2003 - IPC

FIELD: rolling of square profiles with high stretches per one pass. SUBSTANCE: method involves rotating and providing relative reciprocating motion of roll shafts and blank in stand with two pairs of mutually perpendicular variable-radius rolls; tilting and feeding blank after each deformation step; holding blank by means of pair of rolls first in rolling direction and directing axially of rolling direction; squeezing with the use of second pair of rolls by moving said second pair of rolls relative to first pair of rolls by feeding value axially of rolling direction. EFFECT: increased efficiency by increasing each single stretch and improved quality of profiles. 2 dwg