| 摘要 |
<p>PROBLEM TO BE SOLVED: To always keep the performance of tension control in the desirable state, to prevent troubles and to improve productivity by correctly calculating the measured value of tension and also continuously changing the values of parameters of a tension controller corresponding to the thickness of a rolled stock, tension, rolling speed, or the like. SOLUTION: In an interstand tension control system, a tension calculator 9 and control parameter calculator 10 in addition to the tension controller are provided. In the tension calculator 9, by a calculation formula based on the theory of the strength of materials, the value of the tension of the rolled stock is calculated taking the dead weight and bending rigidity of the rolled stocking into consideration based on the measured value of the force which has effect on a looper between stands or exclusive roll for tension with the rolled stock every control period. On the other hand, in the control parameter calculator 10, the correction factor of the apparent elastic modulus of the rolled stock is determined by a prescribed calculating formula every control period, taking the deflection of the rolled stock caused by the dead weight and bending rigidity of the rolled stock into conderation, the value of the parameter is calculated based on the value of this correction factor and the value is outputted to a tension controller 11.</p> |
