SFC Strip Flatness Control

The OPTIROLL® i2 SFC system is an automatic control system to meet a constant tensile distribution over the strip width. Basis for this high precision control is the approved and by ACHENBACH continuously developed flatness measuring roll. With the data acquisition system, developed by ACHENBACH, measuring signals in highest resolution are available for the control system. According to special ACHENBACH rolling mills optimised adapter functions, the measured flatness deviations are corrected from the following various subordinated control loops:

• Roll inclination control by the hydraulic screw-down system
• Work roll bending
• VC Variable Crown backup roll with hydraulically controllable backup roll camber
• WIN-SprayS®: an optimum flatness result is reached by the specially adjusted WIN-SprayS® coolant distribution system on the measuring roll. The volume controlled coolant distribution system can be set on the strip edge covering by the displacement of the nozzle bar and be added by an edge heating by heating oil when required.