Article
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In Situ Measurement of the Machining State in Small-Diameter Drilling by Acoustic Emission Sensing
Version 1
: Received: 25 January 2024 / Approved: 26 January 2024 / Online: 26 January 2024 (11:37:27 CET)
A peer-reviewed article of this Preprint also exists.
Hase, A. In Situ Measurement of the Machining State in Small-Diameter Drilling by Acoustic Emission Sensing. Coatings 2024, 14, 193. Hase, A. In Situ Measurement of the Machining State in Small-Diameter Drilling by Acoustic Emission Sensing. Coatings 2024, 14, 193.
Abstract
In drilling small holes with diameters of 1 mm or less, minute clogging and twining of chips or adhesion of the workpiece material can become factors in causing breakages of the drill bit; moreover, it can be difficult to identify the machining state. Acoustic emission (AE) sensing is a nondestructive inspection technique that measures the elastic-stress waves that are generated when a material is deformed and fractured. AE sensing permits highly sensitive measurements to be made without changing the rigidity of the experimental system, unlike force sensing of cutting resistance, etc. In the present study, attempts were made to identify the machining state and tool wear, and to predict abnormalities in small-diameter drilling by using the change in the frequency of AE signal waveforms arising from deformation and fracture. It was shown that it is possible to predict the breakage of the drill bit by detecting the high-frequency AE signals caused by adhesion. In addition, a correlation map of the AE frequency spectrum for identifying the machining state in a drilling operation is suggested.
Keywords
acoustic emissions; sensing; in situ measurement; monitoring; drilling; cutting; tribology; adhesion; tool wear; frequency analysis
Subject
Engineering, Industrial and Manufacturing Engineering
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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