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Open AccessArticle

Directly Printed Low-Cost Nanoparticle Sensor for Vibration Measurement during Milling Process

Department of Mechanical Engineering, Seoul National University, Seoul 08826, Korea
Department of Production Machines, Fraunhofer Institute for Production Technology IPT, Aachen 52074, Germany
Department of Mechanical Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea
Institute of Advanced Machines and Design, Seoul National University, Seoul 08826, Korea
Authors to whom correspondence should be addressed.
Materials 2020, 13(13), 2920;
Received: 2 June 2020 / Revised: 25 June 2020 / Accepted: 29 June 2020 / Published: 29 June 2020
A real-time, accurate, and reliable process monitoring is a basic and crucial enabler of intelligent manufacturing operation and digital twin applications. In this study, we represent a novel vibration measurement method for workpiece during the milling process using a low-cost nanoparticle vibration sensor. We directly printed the vibration sensor based on silver nanoparticles positioned onto a polyimide substrate using an aerodynamically-focused nanomaterials printing system, which is a direct printing technique for inorganic nanomaterials positioned onto a flexible substrate. Since it does not require any post-process such as chemical etching and heat treatment, a highly sensitive vibration sensor composed of a microscale porous structure was fabricated at a cost of several cents each. Furthermore, accurate and reliable vibration data was obtained by simple and direct attachment to a workpiece. In this study, we discussed the performance of vibration measurement of a fabricated sensor in comparison to a commercial vibration sensor. Using frequency and power spectrum analysis of obtained data, we directly measured the vibration of workpiece during the milling process, according to a process parameter. Lastly, we applied a fabricated sensor for the digital twins of turbine blade manufacturing in which vibration greatly affects the quality of the product to predict the process defects in real-time. View Full-Text
Keywords: milling; workpiece; direct printing; vibration; sensor milling; workpiece; direct printing; vibration; sensor
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Min, S.-H.; Lee, T.H.; Lee, G.-Y.; Zontar, D.; Brecher, C.; Ahn, S.-H. Directly Printed Low-Cost Nanoparticle Sensor for Vibration Measurement during Milling Process. Materials 2020, 13, 2920.

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