Parameter setting device, roll position change amount setting device, roll position change method, and program

摘要

PROBLEM TO BE SOLVED: To configure roll gap settings for a universal rolling mill to provide excellent product dimensional accuracy.SOLUTION: Relative roll gap change amounts dand dfor horizontal rolls and vertical rolls are expressed by an n-th dimensional linear expression with a web thickness variation dand a flange thickness variation das variables. The web thickness variation dand the flange thickness variation dare derived from operation schedule and actual record data in two roll chances. The relative roll gap change amounts dand dfor the horizontal rolls and vertical rolls when each of candidates for coefficient fand coefficient gis used, are derived from the n-th dimensional linear expression, and using the results, the relative roll gaps for the horizontal rolls and vertical rolls when each of the candidates for the coefficient fand coefficient gis used, are then derived. Inter-roll chance zero-adjustment errors are derived from the relative roll gaps for the horizontal rolls and vertical rolls in a normal pair, and the coefficient fand coefficient gby which variations of the inter-roll chance zero-adjustment errors are minimized, are then derived.SELECTED DRAWING: Figure 1