A method of CFRP drilling assisted by ultrasonic, cryogenic temperature and ice support

LI Shujian; CHEN Rong; LI Changping; LI Pengnan; NIU Qiulin; QIU Xinyi

doi:10.13801/j.cnki.fhclxb.20210514.001

Volume 39 Issue 3

Mar. 2021

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LI Shujian, CHEN Rong, LI Changping, et al. A method of CFRP drilling assisted by ultrasonic, cryogenic temperature and ice support[J]. Acta Materiae Compositae Sinica, 2022, 39(3): 1044-1054. doi: 10.13801/j.cnki.fhclxb.20210514.001

Citation:

LI Shujian, CHEN Rong, LI Changping, et al. A method of CFRP drilling assisted by ultrasonic, cryogenic temperature and ice support[J]. Acta Materiae Compositae Sinica, 2022, 39(3): 1044-1054. doi: 10.13801/j.cnki.fhclxb.20210514.001

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A method of CFRP drilling assisted by ultrasonic, cryogenic temperature and ice support

doi: 10.13801/j.cnki.fhclxb.20210514.001

LI Shujian^{1
,
,},
CHEN Rong^2
,,
LI Changping^1
,,
LI Pengnan^1
,,
NIU Qiulin^1
,,
QIU Xinyi^1
,

1.
School of Mechanical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
2.
School of Mechanical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China

Received Date: 2021-03-16
Accepted Date: 2021-05-04
Rev Recd Date: 2021-04-16

Available Online: 2021-05-14

Publish Date: 2021-03-01

Abstract

Abstract

A method of ultrasonic vibration + cryogenic liquid nitrogen + frozen support layer (UCF) is proposed to assist carbon fiber reinforced polymer (CFRP) drilling and effectively reduce machining defects. The basic principle of this method is as follows: the high frequency vibration of the drill bit under ultrasonic action is used to weaken the axial drilling force; the cryogenic temperature liquid nitrogen and the formation of frozen support layer are used to realize the constraint and support of the material at the drilling exit side, and effectively reduce the whole process of drilling heat effect. Based on the basic principle of UCF, corresponding experiment of UCF assisted drilling were carried out, and the hole quality of CFRP under traditional drilling mode (TD) and cryogenic liquid nitrogen + freezing support mode (CF) was compared and analyzed by means of microscopic inspection and characterization and defect factor calculation. The results show that both UCF and CF can increase the axial force, but the maximum axial force increased little. Compared with TD mode, UCF can reduce burr factor by 75%, tear factor by 8.9%, delamination factor by 34.6% and surface roughness R_a by 53.6%.
- CFRP,
- machining defects,
- back plate support,
- cryogenic drilling,
- axial force
Long Abstrsct
Innovation Points

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References(30)

References

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