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Study of milling of low thickness thermoplastic carbon fiber composites in function of tool geometry and cutting conditions

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Abstract

The application of carbon fiber reinforced thermoplastic matrix composites (CFRTP) is constantly increasing in various industrial sectors due to their mechanical properties and advantages compared to thermoset matrix composite. Nevertheless, CFRTP machining generates a current problem due to the anisotropy of these materials, the difficulty of impregnation of the reinforcement in the matrix, and its low melting temperature. For this reason, the study of conventional operations such as milling to achieve geometries with a good surface quality and reduced cosmetic defects is a line of research of great interest. In this article, a comparison of five cutting tools with different geometries has been made in CFRTP milling. The surface quality and the formation of visual defects such as fiber pull-out have been evaluated for each tool and combination of cutting parameters. In this sense, 16.42 μm in terms of Rz is the minimum average value for the complete experiment obtained for a conventional tool (tool A). However, surface qualities in terms of Rz close to 20 μm and minimum cosmetic defects have been obtained with a hybrid tool (tool C) with −10° helix angle and 8 teeth with a combination of cutting parameters of 0.07 mm/tooth and 3000 rpm, being the most complete tool of the experiment.

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Data availability

All the data have been presented in the manuscript.

Abbreviations

Rz:

average of the absolute values of the five highest peaks and the five lowest valleys

TPU:

thermoplastic polyurethane

C/TPU:

carbon/thermoplastic polyurethane

AWJM:

abrasive water jet machining

CFRP:

carbon fiber reinforced plastics with thermoset matrix

CFRTP:

carbon fiber reinforced thermoplastics

z:

number of teeth

Fz:

feed rate per tooth

S:

spindle speed

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Funding

This work has been developed under support of a pre-doctoral industrial fellow financed by NANOTURES SL, mechanical engineering and industrial design department, and Vice-rectorate of Transference and Technological Innovation of the University of Cadiz.

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Authors

Contributions

A.S. and F.B. developed machining tests. M.B. and J.S. developed data treatment. F.B., A.S., M.B., B.S., and J.S. analyzed the influence of the parameters involved. F.B. and A.S. collaborated in preparing figures and tables and F.B., A.S., M.B., B.S., and J.S. wrote the paper.

Corresponding author

Correspondence to Alejandro Sambruno.

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The authors declare no competing interests.

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Sambruno, A., Bañon, F., Salguero, J. et al. Study of milling of low thickness thermoplastic carbon fiber composites in function of tool geometry and cutting conditions. Int J Adv Manuf Technol 114, 2515–2526 (2021). https://doi.org/10.1007/s00170-021-07050-1

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  • DOI: https://doi.org/10.1007/s00170-021-07050-1

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