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Open AccessArticle

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

1
Department of Mechanical Engineering, Seoul National University, Seoul 08826, Korea
2
Department of Production Machines, Fraunhofer Institute for Production Technology IPT, Aachen 52074, Germany
3
Department of Mechanical Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea
4
Institute of Advanced Machines and Design, Seoul National University, Seoul 08826, Korea
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(13), 2920; https://doi.org/10.3390/ma13132920
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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MDPI and ACS Style

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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