Apparatus for controlling re-distribution of load on continuous rolling mill

An apparatus for controlling the re-distribution of a load on a continuous rolling mill comprising:

• a plurality of roll stands for successively rolling a rolled material;
• a rolling force sensor means disposed at each of said roll stands for sensing a rolling load thereon;
• a rolled material product gauge sensor for sensing an exit gauge at a last roll stand of said plurality of roll stands;
• an automatic roll opening positioning means for each of said plurality of roll stands for controlling a roll opening of its corresponding roll stand;
• a memory means for storing therein a ratio of reference rolling forces Pio with respect to said plurality of roll stands or a ratio of reference exit gauges hi between pairs of said plurality of roll stands when said plurality of roll stands are at their optimum rolling conditions for rolling said rolled material;
• and
• a screw-down correction computer means for calculating a roll opening Si at each of said plurality of roll stands so that a deviation .DELTA.Pi in a reference rolling force Pio at each of said plurality of stands from an actual rolling force Pir sensed by its corresponding rolling force sensor means is maintained at said corresponding ratio of reference rolling forces stored in said memory means and so that an exit gauge at said last roll stand is equal to a desired gauge, and for delivering each of said calculated roll openings to its corresponding automatic roll opening positioning means.