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Optimization of Micro-Drilling Parameters for Acoustic Panel Materials Using Taguchi Method

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Abstract:

This study investigates the micro-drilling parameters to minimize perforation error in biodegradable and composite materials: Oil Palm Fiberboard (OPF), Polylactic Acid (PLA), and Printed Circuit Board (PCB). Two biodegradable materials (OPF and PLA) were compared to a standard industrial PCB for benchmarking. Micro perforated hole is important in sound absorber to provide better absorption performance. A Taguchi L27 design of experiments was used to assess the effects of support presence, post-penetration spin time, and spindle speed on dimensional accuracy. For OPF, the lowest average error (0.031 mm) was achieved using no support, a 1 second spin time, and a spindle speed of 6,000 RPM, minimizing tool deflection in the fibrous structure. PLA showed the best result (0.344 mm error) with no support, no spin time, and a moderate spindle speed of 8000 RPM, reducing thermal distortion. For PCB, a layered and brittle material, a sandwiched support setup, no spin time, and a high spindle speed of 10,000 RPM achieved the lowest error (0.040 mm), reducing delamination and chipping. Although the exact optimal settings were not found in the experimental runs, very similar combinations yielded the best accuracy in each material. These findings validate the inferred trends and emphasize the importance of spin time and spindle speed over support. The results provide actionable guidelines for high-precision fabrication of eco-friendly acoustic absorbers, contributing to environmentally sustainable material processing and enhanced indoor acoustic control.

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Periodical:

Key Engineering Materials (Volume 1053)

Pages:

45-55

DOI:

https://doi.org/10.4028/p-le3wgE

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Online since:

May 2026

Authors:

Jong Yee Fang, Lu Ean Ooi*, Choe Yung Teoh, Keng Wai Chan

Keywords:

Acoustic Panel, Imperfect Hole, Micro Perforated, Noise Control

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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