Patent ID: 9073107
Filing Date: 2015-07-07
Classification: B21B

Abstract:
1. An operating method for a rolling mill for rolling a flat rolling stock from an initial thickness to a final thickness, comprising: rolling the rolling stock from the initial thickness to an intermediate thickness, inserting a temporal rolling pause, and rolling the rolling stock from the intermediate thickness to the final thickness, wherein the rolling stock is rolled from the initial thickness to the intermediate thickness in a number of reduction stages, and before the rolling stock is rolled, determining a permitted thickness range for the intermediate thickness based on technological boundary conditions, and determining the number of reduction stages for roiling the rolling stock from the initial thickness to the intermediate thickness such that the resulting intermediate thickness lies within the permitted thickness range and either: (a) the determined number of reduction stages provides that the performance limits of the rolling mill are fully utilized in all reduction stages, or (b) the determined number of reduction stages provides that the performance limits of the rolling mill are not fully utilized in at least one reduction stage, and wherein a rolling process in which the performance limits of the rolling mill were fully utilized for one fewer than the determined number of reduction stages would provide an intermediate thickness that lies outside the permitted thickness range.