Publication: Evaluating the performance of nanocomposite coatings in drilling CFRP composite panels for aircraft applications
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Date
2024-07
Authors
Muhammad Aliff Farhan bin Zamzami
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Abstract
The aerospace industry increasingly relies on Carbon Fiber Reinforced Polymer (CFRP) composites, necessitating advanced machining techniques to ensure precision and structural integrity. Traditional drilling methods often lead to challenges such as delamination and tool wear, highlighting the need for optimized solutions. This study evaluates the effectiveness of various drill bit coatings in enhancing performance and durability during CFRP machining. The research involved extensive experimental testing of uncoated, Chromium-coated, and Titanium-coated drill bits. Surface roughness, diameter error, and wear rate were measured and analysed to determine the relative performance of each coating. The experiments were conducted under controlled conditions, with consistent feed rates and spindle speeds to ensure reliable comparisons. Results indicate that Titanium-coated drill bits provided the best balance of surface roughness and diameter accuracy, making them ideal for applications requiring high precision and smooth finishes. Chromium-coated drill bits excelled in wear resistance, showing the least material loss over time, but exhibited higher diameter errors. Uncoated drill bits, although achieving the least diameter error, suffered from the highest wear rate and the roughest surface finish, limiting their practicality for extended use. The data underscores the importance of protective coatings in improving tool longevity and performance. In conclusion, the study recommends Titanium-coated drill bits for precision machining and Chromium-coated drill bits for high-durability applications. Regular maintenance and further research into advanced coatings are also advised to enhance drilling efficiency and tool life in aerospace manufacturing.