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An investigation of drilling high-strength CFRP composites using specialized drills

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Abstract

Machining of high-strength carbon fiber reinforced polymers (CFRPs) has faced great challenges in quality control and tool wear management due to their inherent heterogeneity and high abrasiveness leading to serious workpiece damage and rapid tool wear. The present paper contributes to an experimental investigation of evaluating the machinability of one type of high-strength T800/X850 CFRPs representative of aircraft components. The novelty of this work lies in identifying the effects of different specialized drills on the drilling process of the high-strength CFRPs by covering a variety of aspects involving the drilling forces, hole morphologies, workpiece damage, hole dimensional accuracy, and tool wear. Both the in-situ and post-process measuring results were correlated with the input process parameters and the used drill bits. A particular focus was placed on the inspections of the resulting tool morphologies and wear mechanisms governing the drilling of the high-strength CFRPs. The results highlight the importance of using functionally designed drills and optimum cutting conditions in realizing the damage-free drilling of T800/X850 composites.

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Funding

The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (Grant No. 51705319), Shanghai Pujiang Program (Grant No. 17PJ1403800), and Shanghai Academy of Spaceflight Technology (Grant No. SAST2017-060). The work is also partly sponsored by the Research Project of State Key Laboratory of Mechanical System and Vibration (Grant No. MSVZD201704).

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Authors and Affiliations

  1. State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People’s Republic of China

    Jinyang Xu, Chao Li & Ming Chen

  2. MSMP – EA 7350, Arts et Métiers ParisTech, 51006, Châlons-en-Champagne, France

    Mohamed El Mansori

  3. Department of Mechanical Engineering, Texas A&M University, College Station, TX, 77840, USA

    Mohamed El Mansori

  4. Shanghai Aerospace Equipments Manufacturer Co., Ltd., Shanghai, 200245, People’s Republic of China

    Fei Ren

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  1. Jinyang Xu
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  2. Chao Li
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  3. Ming Chen
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  4. Mohamed El Mansori
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  5. Fei Ren
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Correspondence to Jinyang Xu.

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Xu, J., Li, C., Chen, M. et al. An investigation of drilling high-strength CFRP composites using specialized drills. Int J Adv Manuf Technol 103, 3425–3442 (2019). https://doi.org/10.1007/s00170-019-03753-8

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  • DOI: https://doi.org/10.1007/s00170-019-03753-8

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