To provide a device for diagnosing abnormality, which directly receives an elastic-wave signal generated when cracks occur or develop on the rotary shaft of a rolling mill without damping the elastic wave which is generated when cracks of a material occur or develop and by removing the working noise during rolling a magnetic steel sheet or the like, and to provide a diagnostic method using the diagnosing device.
The device is composed of an elastic wave detecting means 20 for detecting the elastic wave of the rotary shaft, the abnormality diagnostic means 23 and an input means of the screw-down signal or rotation signal of the rolling mill. The abnormality diagnostic means 23 performs diagnosis by using the abnormality diagnostic device which is provided with the functions for detecting the elastic wave which is propagated during no-load rotation from the information of the screw-down signal and the rotation signal of the rolling mill and the information of the elastic wave detected by the elastic wave detecting means 20 and for diagnosing the abnormality generated on the rotary shaft 105 or the rotary shaft and a bearing 103 by analyzing the detected elastic wave.
MIDORIKAWA SATORU
Kiyoshi Kuruma
Suzuki Yoko
Takanashi Reiko
Next Patent: MULTISTAGE PRESSING DEVICE AND METHOD FOR FORMING OBJECT TO BE FORMED USING THE SAME