Abstract: Presently, the common roller arrangement model for the 20-high rolling mill is primarily based on the assumption of left-right symmetry within the roller system. However, it’s important to note that the actual diameters of the corresponding rollers may not necessarily align. In such instances, relying solely on the left-right symmetry approach introduces potential errors, which could compromise the precision of the roller arrangement process.Moreover, this method is not suitable for cases where there are discrepancies in the diameter compensation between roller A and D, thus it exhibits certain limitations. The coordinate calculation method proposed in this paper for the asymmetric roller arrangement model comprehensively addresses these concerns, offering a more expansive scope of applicability and heightened precision in calculation.At the same time, the results of this paper can be programmed to calculate the roller center coordinates quickly and accurately.

Key words: 20-high rolling mill, roller arrangement, asymmetry, coordinate calculation, cold rolling