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On reliable measurement of micro drilling forces and identification of different phases
, S. Ravisubramanian
Published in Elsevier B.V.
Volume: 73
Pages: 335 - 340
Mechanical micro-drilling process is often used in the manufacture of miniature components and molds. Frequent breakage of micro-drill is a major problem necessitating a thorough investigation into the process. One of the important responses measured during micro-drilling process is variation of thrust force and torque. Since the values of thrust force and torque are very low in micro-drilling, reliable measurements have to be carried out using high-resolution dynamometer. In the present work, micro-drilling is carried out using 0.5 mm diameter drill on Al 6061-T6 sheet of 3 mm thickness. The measurement results obtained from multi-component dynamometer are discussed first. Subsequently, a torque sensor mounted on the multi-component dynamometer is used to measure the torque, while the thrust force is acquired from latter. Since it is practically impossible to start acquiring the signals at a given time instant, the signals have to be synchronized in time domain using a novel signal processing technique. Different phases in micro-drilling, namely entry, full penetration and dwell are identified uniquely. © 2015 Elsevier Ltd. All rights reserved.
About the journal
JournalData powered by TypesetMeasurement: Journal of the International Measurement Confederation
PublisherData powered by TypesetElsevier B.V.
Open AccessNo
Concepts (11)
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    Signal processing
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    Time domain analysis
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    Cross correlation techniques
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    Micro drilling
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    Thrust forces
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    Torque sensors
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