FOUR-ROLL SET OF THREE-HIGH ROLLING STAND Russian patent published in 1997 - IPC

FIELD: metallurgy, namely sizing and rolling railway road rails in three-high rolling stands in intermediate roll passes operating with use of supporting cones. SUBSTANCE: open and closed grooves of roll grooved passes of upper and lower levels operating without use of first mean roll are mutually shifted at boring out due to thinning open sides of rail flange and head by value of supporting cone wear respectively of upper or lower roll when roll set operates with use of first mean roll. EFFECT: enhanced quality of rolled section, increased efficiency. 1 dwg