1991 Volume 77 Issue 4 Pages 528-535
An interstand thickness gage was installed between the F4 and F5 stand of the hot strip finishing mill in Kashima Steel Works. It can measure the strip thickness with the same accuracy of the conventional thickness gage at the finishing mill exit, even if the pass-line of the strip is changed by the looper between F4 and F5 stand. Feedforward head-end gage control which adjusts the roll gaps of both F6 and F7 stand according to the F4 exit thickness deviation measured by the interstand thickness gage has been developed and is now in operation at the hot strip mill.
The thickness accuracy at the head-end of the rolled strip can be improved over 30% by the feedforward head-end gage control compared with that by the conventional control.
