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Prediction of a small diameter drill bit breakage using metric entropy
Conference paper   Open access

Prediction of a small diameter drill bit breakage using metric entropy

Hakki Erhan Sevil and Serhan Ozdemir
pp.120-123
International Colloquium on Mathematics in Engineering and Numerical Physics (Bucharest, Romania, 10/06/2006–10/08/2006)
2006

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Abstract

In this study, a series of condition monitoring experiments on drill bits were carried out. Small diameter drill bit run-to-failure test rig was constructed and the prediction tests were performed. In the experiments, 10 small drill bits ( 1 mm ⌀ ) were tested until they broke down, while vibration data were consecutively taken in equal time intervals. A consistent decrement in variation of metric entropy just before the breakage was observed. As a result of the experiment results, metric entropy variation could be implemented as an early warning system.
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