METHOD OF DETECTING ROLLING MALFUNCTION AND DEVICE FOR DETECTING MALFUNCTION OF ROLLING MILL

摘要

PROBLEM TO BE SOLVED: To provide a method and device for detecting malfunction of a rolling mill detecting occurrence of small bending when rolling so as to cope with it at an early stage.;SOLUTION: The malfunction detecting device 28 includes a vibration sensor 30 disposed on a bearing holder 26 of a second roll stand 18, a determinator 32 determining malfunction based on vibration data detected by the vibration sensor 30, and a notification unit 34 notifying malfunction occurrence when the malfunction has been determined by the determinator 32. In occurrence of the small bending, a peak value of a vibration speed in vibration within a range of 90-130 Hz in vibration frequency reaches at least 0.04 cm/s. Thus, the determinator 32 determines the occurrence of the small bending when the peak value of the vibration speed in vibration that the vibration frequency detected by the vibration sensor 30 appears in the range of 90-130 Hz is at least 0.04 cm/s.;COPYRIGHT: (C)2013,JPO&INPIT