Patent ID: 7481090
Filing Date: 2009-01-27
Classification: B21B

Abstract:
1. A rolling method for a flat-rolled metal material, for executing rolling by using rolling equipment comprising a rolling mill and a coiling device for coiling a rolled metal material located at an exit side of said rolling mill; said rolling mill having an upper roll assembly supporting an upper work roll and a lower roll assembly supporting a lower work roll; either one, or both, of said upper roll assembly and said lower roll assembly comprising a split entry side backup roll split into at least three segments in an axial direction and a split exit side backup roll split into at least three segments in an axial direction; said entry side split backup roll and said exit side split backup roll each having a construction supporting both vertical direction load and rolling direction load acting on the work roll supported by said entry side split backup roll and said exit side split backup roll; each segment of said entry side split backup roll and each segment of said exit side split backup roll independently having a load measuring device; said method comprising the steps of: calculating a difference Fr responsive to said calculated difference Fr F q θ Z a F