Modeling of the Operation of the Tandem Mill for Hot Rolling Processes

Abstract

Manufacturing line core mills, at steel production lines for Hot Strip Rolling, have the function to shape the steel and provide the characteristic steel sheet properties. Tandem mill has been set up for these purposes, which restricts the strip thickness and removes the surface layer or scale. During these mills work it is feasible to implement a mathematical model that enable to detect the used backup roll behavior during this production line phase. This article consists on the assessment of a main variable series during the hot strip rolling, where the backup rolls are the ones which receive the loads during the operation, and establishes a mathematical model to enable to detect their behavior before the changes in these variable values. For the decision making about manufacturing and business, counting with a mathematical model and experimental design of their performance allows to analyze the information, to observe the behavior of the variables and their values and to make the best decision to analyze the results and decide about the production work continuity, the importance of some rolls replacement, their own turnover, their maintenance or the production stoppage in order to prevent failures which affect the production quality and increase the corrective maintenance costs.