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2024-08-11 17:46:15

Abstract: Carbon fiber-reinforced polymer (CFRP) composites have gradually replaced metals due to their exceptional strength-to-weight ratio compared to metallic materials. However, the drilling process often reveals various defects, such as surface roughness, influenced by different drilling parameters. This study explores the drilling quality of uni-directional CFRP composites, as well as hybrid Al2O3 alumina and hybrid SiC silicon carbide nano-composites, through experimental exploration using step, core, and twist drills. Response surface methodology (RSM) and statistical tools, including main effect plots, ANOVA, contour plots, and optimization techniques, were used to analyze the surface roughness of the hole. Optimization plots were drawn for optimal conditions, suggesting a spindle speed of 1500 rpm, feed of 0.01 mm/rev, and a 4 mm drill diameter for achieving minimum surface roughness. Furthermore, two machine learning models, artificial neural network (ANN) and random forest (RF), were used for predictive analysis. The findings revealed the robust predictive capabilities of both models, with RF demonstrating superior performance over ANN and RSM. Through visual comparisons and error analyses, more insights were gained into model accuracy and potential avenues for improvement. Keywords: carbon fiber-reinforced polymer; drilling; response surface methodology; artificial neural network; random forest

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202459 — Spotting drills typically have a cutting angle (120°) near that of the drill that will be used for the through hole (118°).

Nargis, T.; Shahabaz, S.M.; Acharya, S.; Shetty, N.; Malghan, R.L.; Shetty, S.D. A Comprehensive Study on the Optimization of Drilling Performance in Hybrid Nano-Composites and Neat CFRP Composites Using Statistical and Machine Learning Approaches. J. Manuf. Mater. Process. 2024, 8, 67. https://doi.org/10.3390/jmmp8020067

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Nargis, Tanzila, S. M. Shahabaz, Subash Acharya, Nagaraja Shetty, Rashmi Laxmikant Malghan, and S. Divakara Shetty. 2024. "A Comprehensive Study on the Optimization of Drilling Performance in Hybrid Nano-Composites and Neat CFRP Composites Using Statistical and Machine Learning Approaches" Journal of Manufacturing and Materials Processing 8, no. 2: 67. https://doi.org/10.3390/jmmp8020067

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Nargis, T., Shahabaz, S. M., Acharya, S., Shetty, N., Malghan, R. L., & Shetty, S. D. (2024). A Comprehensive Study on the Optimization of Drilling Performance in Hybrid Nano-Composites and Neat CFRP Composites Using Statistical and Machine Learning Approaches. Journal of Manufacturing and Materials Processing, 8(2), 67. https://doi.org/10.3390/jmmp8020067

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Nargis T, Shahabaz SM, Acharya S, Shetty N, Malghan RL, Shetty SD. A Comprehensive Study on the Optimization of Drilling Performance in Hybrid Nano-Composites and Neat CFRP Composites Using Statistical and Machine Learning Approaches. Journal of Manufacturing and Materials Processing. 2024; 8(2):67. https://doi.org/10.3390/jmmp8020067

Hole Sizes for Cold Form Tapping. These charts are supplied as a recommendation only. Finding the correct drill size for a Spiralock tap may be a Cut and ...

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Dec 29, 2018 — ... cutting diameter x number of flutes x spindle speed = feed rate. The ... Here is another excel chart with reference feeds and speeds. I ...

Aug 15, 2024 — Regular Speed ; 1/4" Ball End Mill, 2190, 1100, 2.85, 4.1 ; 1/8" Single Flute Flat End Mill UC, 1400, 700, 1.45, 6.4 ...

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JOBBER LENGTH DRILL BIT, #30 DRILL BIT SIZE, 1⅝ IN FLUTE L, 2¾ IN L, RIGHT HAND ; Number of Flutes 2 ; Maximum Drilling Depth 1 1/64 in ; Cutting Direction Right ...