The FVC Work Roll Contour and Strip Profile Control Characteristics for Schedule-free Rolling of Electrical Steel

• 1、School of Mechanical Engineering,University of Science and Technology Beijing, Beijing 100083
• 2、National Engineering Research Center of Flat Rolling Equipment, University of Science and Technology Beijing,Beijing 100083

Abstract：There is a serious problem on crown deviation arises when a newly built domestic hot strip production line is producting electrical steel with a wide variety of widths. Through analysis, the characteristics of electrical steel schedule free rolling and a lack of crown control capacity of rolling mills are thought the main reasons for the problem. Concerning the real conditions of practical production, a variable crown working roll named FVC（Free Variable Crown）is given by applying the design method of variable crown roll contour, and its crown control characteristics is compared with CVC and SmartCrown in this paper. Besides a thermal crown analysis model and a work roll wear model are built to help research the stability of the new roll contour's crown control characteristics through all the compaign. The research shows that FVC coutour performs an adequate crown control ability when the width of strip varies from 900mm to 1300mm and a stable crown control capability within the entire rolling compaign. Thus, it provide a basis for industrial rolling test and application of production practice.

Keywords： hot rolling electrical steel SFR roll contour Strip Profile and Flatness Control