Feedforward control method for the thickness in the tandem cold rolling mill

摘要

The present invention relates to the field of cold-rolled strip, particularly regarding the thickness control in the tandem cold rolling mill. Feedforward control method for the performance of thickness at the tandem cold rolling mill, a step of selecting one or more frames as an indirect instrument hypothetical performance of the strip, the frame S ₁ is the performance of the strip virtual indirect must be used as a measuring instrument process and; the variation in deformation resistance of the supplied material to calculate, with a load cell to a frame selected as an indirect measuring device of the performance of the strip, the frame S _i the value of the variation of the deformation resistance of the supplied material process and to obtain by calculation of; Finally, a step of calculating a feed-forward adjustment amount for each frame. The present invention, through the deformation resistance force of the indirectly measured supplied material, performs feedforward thickness control, the deformation resistance of each portion of the strip is fed through the selected frame material By measuring, for the accuracy of the thickness control of the cold rolling to prevent the effects of changes in the performance of the hot rolled product of the supplied material and to improve the thickness control of the accuracy of the entire steel coil lengthwise and to ensure thickness accuracy of the final product in the direction of the strip, it is possible to reduce the variation in thickness of the final product strip, in order to ensure a stable rolling, it is beneficial importance.