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Experimental investigation on machining performance during orbital drilling of CFRP

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Abstract

As the most promising carbon fiber reinforced plastic (CFRP) hole making method, orbital drilling is widely concerned. This paper aims to understand the influence of the cutting parameters, tool diameters and ratio between milling and drilling (\({R}_{m\&d}\)) on machinability in CFRP orbital drilling. The effects of cutting parameters on thrust force and cutting temperature were studied by orthogonal experiments, and experiments were performed to investigate the variations of tool diameters, ratio between drilling and milling on thrust force, cutting temperature, tool wear and machining quality. The experimental results show that the spindle speed and axial feed rate have apparent effects on thrust force, and the tangential feed rate appreciably impacts on the cutting temperature. The selection of tool diameter and the \({R}_{m\&d}\) has specific influence on tool wear, machining quality and cutting temperature. The result is helpful for selecting cutting parameters and tool diameters for high quality hole machining in CFRP orbital drilling.

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Abbreviations

\({R}_{m\&d}\) :

The ratio between milling and drilling

\(n\) :

Spindle speed (rpm)

\({v}_{t}\) :

Tangential speed \({v}_{t}={f}_{t}\cdot n\) (mm/min)

\({v}_{z}\) :

Axial speed \({v}_{z}={f}_{z}\cdot n\) (mm/min)

\(e\) :

Eccentric (mm)

\({f}_{t}\) :

Tangential feed rate (mm/rev)

\({f}_{a}\) :

Axial feed rate (mm/rev)

\({a}_{p}\) :

Screw pitch of helical path (mm)

\({V}_{m}\) :

Volume of material removed by milling

\({V}_{d}\) :

Volume of material removed by drilling

\({R}_{h}\) :

Radius of the hole (mm)

\({R}_{t}\) :

Radius of the tool (mm)

\({F}_{d}\) :

Delamination factor

\({D}_{max}\) :

Maximum diameter of damage zone (mm)

\({D}_{nom}\) :

Hole diameter (mm)

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Funding

National Key Research and Development Program of China under Grant No. 2018YFB1306803.

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Authors and Affiliations

  1. School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, China

    Linghao Kong, Dong Gao, Yong Lu & Pengfei Zhang

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  1. Linghao Kong
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  2. Dong Gao
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  3. Yong Lu
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Contributions

Conceptualization, LHK, YL and DG; methodology, LHK, YL; experimental, LHK, PFZ; formal analysis LHK; writing–original draft, LHK; review and editing, YL; writing–final revision and editing, LHK. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Yong Lu.

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Kong, L., Gao, D., Lu, Y. et al. Experimental investigation on machining performance during orbital drilling of CFRP. Int J Adv Manuf Technol 121, 1611–1621 (2022). https://doi.org/10.1007/s00170-022-09437-0

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