Patent ID: 7775079
Filing Date: 2010-08-17
Classification: B21B

Abstract:
1. A rolling method for a flat-rolled metal material, for executing rolling by using rolling equipment including a rolling mill ( 1 ) and at least a pair of pinch rolls ( 11 , 12 ) arranged on the exit side of said rolling mill clamping a rolled material, having a pinch roll rotation driving device applying a rolling traveling direction force to said rolled material and a measuring device ( 19 , 20 ) for independently measuring a reaction of a rolling direction force acting between said pinch rolls and said rolled material on an operator side and on a driving side, said rolling mill having a construction in which either one, or both, of upper and lower roll assemblies have a mechanism for supporting a work roll ( 3 , 4 ), by split backup rolls ( 5 , 6 ) split into at least three segments in an axial direction, said split backup roll group having a construction for supporting both a vertical direction load and a rolling direction load acting on said contacting work roll ( 3 , 4 ) and each of said split backup rolls independently having a load measuring device ( 9 , 10 ), said method comprising the steps of: applying tension to said rolled material ( calculating a difference F or calculating said difference F controlling left-right difference of roll gap of said upper work roll and said lower work roll to result in said calculated difference F where, F q θ Z a F