CONTROL METHOD OF ROLLING FOR SINGLE STAND MULTIPASS ROLLING MILL

摘要

PURPOSE:To prevent the mechanical damage of each part of rolling mill by providing a device used for estimating the run-out of material tail-end at each rolling pass, etc. and transferring the roll speeds from different speeds to equal speeds when work rolls are in danger of being in direct contact with each other. CONSTITUTION:A titled device is constituted of a tracking device 20 at an inlet side of the 1st pass, the 2nd detector for detecting the breakage of a material A to be rolled, a device for generating timing, and speed setting device 26 for setting a target speed-value necessary for the purpose of transferring the upper and lower work rolls at each rolling pass to the equal speed running in accordance with the timing generated by the timing generating device. The device 20 estimates the timing of tail-end run-out at each rolling pass basing on the detecting signal of the tail-end position of material A. Further, the timing generating device generates the timing necessary for transferring the upper and lower work rolls at each pass from different speeds to equal speeds basing on the output signal of device 20, prior to the run-out timing of tail-end position or breaking position of material A.