Abstract
One of the local tasks of the cold rolling process the digital twin is the tensions selection that will contribute to obtaining a given quality strip with the required productivity. Since the tension influence on the rolling process is not unambiguous, the problem of choosing a rational tension is a multi-criteria optimization problem, which makes it difficult to use the digital twin in real time. To substantiate the tension magnitude when using a digital twin in real time, the tension dependences on the process parameters have been studied at different cold rolling mills sections - at the entrance to the first stand, in the inter-stand gaps, at the exit from the last stand and during coiling. According to the study results, multiple approximations were constructed, reliable with a confidence level of 95%. These approximations reflect the well-known positive experience of various cold-strip mills and allow the development energy-efficient technologies for the cold-rolled steel production for various purposes with an increased surface quality (including high-strength) on various rolling mills. The function the algorithm "The tension mode first approximation" of the cold rolling process digital twin has been developed.
Keywords:
cold rolling process, cold rolling mill, digital twin, strip tension, tension at the entrance to the first stand, tension in the inter-stand gaps, tension at the exit of the last stand, tension during coiling, tension level, strip surface quality, energy efficiency.