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Research on drilling CFRP laminate with a thin woven glass fiber surface layer using plane rake–faced twist drill

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Abstract

The delamination produced during drilling CFRP will affect its structural strength seriously. Delamination is closely related to the thrust force during drilling, which is closely related to the tool, so it is particularly important to choose the tools with appropriate geometric structure. Many scholars used tools with different geometric structure to drill CFRP, and then conducted the drilling damage analyses and drilling mechanism researches. It finally came to a conclusion that a drill with a special structure had certain advantages compared with a common twist drill in the drilling process. A new type of plane rake–faced twist drill was used to drill the CFRP laminate with a thin-woven glass fiber surface layer. Experimental results showed that the plane rake–faced twist drill along cutting edge had a constant reference rake angle value, which caused the plane rake–faced twist drill generated smaller thrust force and less drilling damage than the common twist drill. As the reference rake angle of the plane rake–faced twist drill increased, the thrust force and drilling damage decreased. It was revealed the inhibition of the thin-woven glass fiber surface layer on the drilling damage at entrance and exit. Finally, it was proposed that when the plane rake–faced twist drill was used to drill CFRP laminate with a thin-woven glass fiber surface, 46° reference rake angle should be selected.

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Acknowledgements

The authors would like to thank the anonymous reviewers for their valuable comments and suggestions to improve the quality and readability of the paper

Funding

This project is supported by Basic Scientific Research Foundation of Central University (No. 3122019081).

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Contributions

Methodology: Liping Liu and Bo Lian; experimental work: Bo Lian, Kehao Duan, Changgeng Zhou, Xueming Zhu, Pingfeng Xia; data analysis: Liping Liu, Bo Lian, and Kehao Duan; writing the first draft: Bo Lian; writing, review, and editing: Liping Liu, Bo Lian; funding acquisition: Liping Liu. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Liping Liu.

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Liu, L., Lian, B., Zhou, C. et al. Research on drilling CFRP laminate with a thin woven glass fiber surface layer using plane rake–faced twist drill. Int J Adv Manuf Technol 117, 1781–1796 (2021). https://doi.org/10.1007/s00170-021-07796-8

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  • DOI: https://doi.org/10.1007/s00170-021-07796-8

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