Finishing block with dual speed sizing capability

摘要

A block type rolling mill having work roll pairs arranged along a rolling line to roll a single strand product in a twist-free manner, wherein the work roll pairs are driven by a common mill drive via a drive train which includes first and second line shafts extending in parallel relationship with the rolling line, and intermediate drive means for mechanically interconnecting two successive work roll pairs interposed between the two successive work roll pairs and the first and second line shafts, and first and second engagement means for alternatively connecting the intermediate drive means to one or the other of the first and second line shafts via respective first and second intermeshed gear sets having different gear ratios.