Совершенствование способа шлифования рабочих S-образных валков с целью снижения выхода несоответствующей продукции по поперечному профилю

Abstract

Increase of requirements to quality of the flat-rolled steel causes the appearance of new methods and im-provement of the well-known approaches to improving the geometry of thin-gage rolled steels. On modern rolling mills, control and management of the strips cross-section is carried out by a profile and flatness control system (PFC). The main channel of the influence of such systems on the geometric parameters of the rolled steel is the axial shifting of S-shaped working rolls in CVC (Continuous Variable Crown) mills. The performance of the PFC is determined by the correct choice of the initial (machining) profile of the working rolls. The paper discusses the way to improve the meth-odology of grinding S-shaped working rolls by taking into account the thermal deformations, arising from the contact with the hot strip.The mathematical model of the thermal condition of S-shaped rolls,which allows to predict the change of the roll’s thermal profile, gives the possibility to create the algorithm for the grinding of the working rolls in hot condition and increase the accuracy of performance of their machining profile.