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Design of internal-chip-removal drill for CFRP drilling and study of influencing factors of drilling quality

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Abstract

In order to meet the requirements of green, high-efficiency, and high-quality hole-machining in carbon fiber reinforced polymer (CFRP), firstly, this work introduces the suction-type internal-chip-removal system, which could discharge the chips formed in the CFRP drilling process in a timely and efficient manner. And based on the system working principle, the design basis of the inner flow channel of the suction-type internal-chip-removal drill system is provided. Secondly, we studied the influence of the PCD drill structural parameters on the drilling force by experiment and obtain the conclusion that the drilling force will be increasing when the front angel is getting larger under the drilling parameters of n = 3000r/min and f = 200mm/min; however, it increased slowly when the front angel (γ1) is in the range of 118 °  ≤ γ1 < 130°. Meanwhile, with the increase of the rear angle (α), the drilling force increases first and then decreases. Then, based on the research results above and combined with experiment and simulation of ABAQUS User subroutine to define material behavior (VUMAT), we completed the design of PCD double-peak angel blade for suction-type internal-chip-removal drill. Finally, we manufactured the drill for suction-type internal-chip-removal system, verified the accuracy of the design by experiment comparison, and researched the influence of chip-removal negative pressure on drilling defect.

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Acknowledgments

Thanks #to the National Natural Science Foundation Project (51475127) for supporting the research of this subject.

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Authors and Affiliations

  1. School of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin, 150080, China

    Chengyang Xu, Yiwen Wang & Xianli Liu

  2. School of Automation Engineering, Harbin University of Science and Technology, Harbin, 150080, China

    Jiazhong Xu

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  1. Chengyang Xu
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  2. Yiwen Wang
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  3. Jiazhong Xu
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  4. Xianli Liu
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Correspondence to Yiwen Wang.

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Xu, C., Wang, Y., Xu, J. et al. Design of internal-chip-removal drill for CFRP drilling and study of influencing factors of drilling quality. Int J Adv Manuf Technol 106, 1657–1669 (2020). https://doi.org/10.1007/s00170-019-04698-8

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  • DOI: https://doi.org/10.1007/s00170-019-04698-8

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