PURPOSE: To improve the dimensional accuracy of a product such as bar or wire rod by comparing a measured drooping quantity of loop with its target value and controlling the number of revolutions of a rolling roll so as to eliminate the deviation between both values.
CONSTITUTION: An arithmetic control unit 13 indexes the Young's modulus table of a memory unit 14 in accordance with an information, which specifies an interstand condition, outputted from a setting board 12, and decides also the target value δ0 of a loop-drooping quantity corresponding to a target axial force by consulting other inputted data, to output it to a comparator unit 15. The unit 15 compares the target value δ0 with a measured value δ outputted from a drooping quantity detector 10, to input its deviation to the unit 13. The unit 13 outputs a control signal Cu or Cd so as to make the deviation zero in accordance with the . Though the signal Cu is primarily given to rolling rolls 1 on the upstream side, the successive control for all the rolling rolls on the upstream side is successively preformed after the control of rolls 1. The same is performed in regard to the signal Cd.
TAKAHASHI YOUICHI
MORIGA MIKIO
MIZUTA TOKUO
| JPS54120264A | 1979-09-18 |
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