Bearing diagnostic devices, bearing diagnostic methods, bearing diagnostic programs and machine tools

Abstract

[Problem] The objective is to provide a bearing diagnostic device with a low risk of misjudgment even when the overall amplitude acceleration increases due to external factors such as noise. [Solution] The bearing diagnostic device 20 includes: an acquisition unit 31 that acquires vibration acceleration information representing the vibration acceleration of the bearing 15; a calculation unit 32 that calculates the envelope vibration acceleration calculated by performing envelope processing on the vibration acceleration and further performing frequency analysis processing; a determination unit 33 that determines whether the bearing 15 is abnormal based on the ratio of the maximum value of the envelope vibration acceleration to the representative value of the envelope vibration acceleration; and an output unit 34 that outputs an abnormality signal when the bearing is determined to be abnormal during the determination process.

Images