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Abstract: This paper focuses on the effect of the drill geometry on the drilling of woven Carbon Fiber Reinforced Polymer composite (CFRPs). Although different geometrical effects can be considered in drilling CFRPs, the present work focuses on the influence of point angle and wear because they are the important factors influencing hole quality and machining forces. Surface quality was evaluated in terms of delamination and superficial defects. Three different point angles were tested representative of the geometries commonly used in the industry. Two wear modes were considered, being representative of the wear patterns commonly observed when drilling CFRPs: flank wear and honed cutting edge. It was found that the crossed influence of the point angle and wear were significant to the thrust force. Delamination at the hole entry and exit showed opposite trends with the change of geometry. Also, cutting parameters were checked showing the feed’s dominant influence on surface damage. Keywords: drilling; woven CFRPs; surface quality; wear

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© 2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Feito, Norberto, José Díaz-Álvarez, Antonio Díaz-Álvarez, José Luis Cantero, and María Henar Miguélez. 2014. "Experimental Analysis of the Influence of Drill Point Angle and Wear on the Drilling of Woven CFRPs" Materials 7, no. 6: 4258-4271. https://doi.org/10.3390/ma7064258

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Feito N, Díaz-Álvarez J, Díaz-Álvarez A, Cantero JL, Miguélez MH. Experimental Analysis of the Influence of Drill Point Angle and Wear on the Drilling of Woven CFRPs. Materials. 2014; 7(6):4258-4271. https://doi.org/10.3390/ma7064258

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Feito, N.; Díaz-Álvarez, J.; Díaz-Álvarez, A.; Cantero, J.L.; Miguélez, M.H. Experimental Analysis of the Influence of Drill Point Angle and Wear on the Drilling of Woven CFRPs. Materials 2014, 7, 4258-4271. https://doi.org/10.3390/ma7064258

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Feito, N., Díaz-Álvarez, J., Díaz-Álvarez, A., Cantero, J. L., & Miguélez, M. H. (2014). Experimental Analysis of the Influence of Drill Point Angle and Wear on the Drilling of Woven CFRPs. Materials, 7(6), 4258-4271. https://doi.org/10.3390/ma7064258

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