Preventative Monitoring System for Main-Spindle of Machine Tool —Comparison of Signal Processing Methods
In the highly flexible-automated manufacturing system, e.g. FMS, even a neglectfully small fault may induce an imaginable disaster, and thus it is very important to detect the fault before it developes to the vital condition. This paper aims at proposing a preventive monitoring system for the main-spindle bearing in the machine tool while its running condition under the random excitation, it being similar to the actual working environment. Several different types of artificial damages are made on both the tapered roller bearing and ball bearing of angular contact type. The acceleration signals coming from the transducer on the headstock, with normal and damaged bearings in the main-spindle successively, are investigated and compared. The conventional envelope wave method is found to have the limited availability.
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