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research-article

Drilling CFRP laminates by gyro-driving grinding wheel system with copper/diamond functionally graded grinding wheel

[+] Author and Article Information
Takahiro Kunimine

Faculty of Mechanical Engineering, Institute of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan; Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
kuniminet9@gmail.com

Hideaki Tsuge

Industrial Research Institute of Gifu Prefecture, Oze 1288, Seki 501-3265, Japan
tsuge-hideaki@rd.pref.gifu.jp

Daisuke Ogawa

Industrial Research Institute of Gifu Prefecture, Oze 1288, Seki 501-3265, Japan
ogawa-daisuke1@rd.pref.gifu.jp

Motoko Yamada

Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
yamada.motoko@nitech.ac.jp

Hisashi Sato

Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
sato.hisashi@nitech.ac.jp

Yoshimi Watanabe

Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
yoshimi_albany@yahoo.co.jp

1Corresponding author.

ASME doi:10.1115/1.4039650 History: Received March 31, 2017; Revised March 03, 2018

Abstract

This study aims to investigate the drilling performance of a copper/diamond functionally graded grinding wheel fabricated by centrifugal sintered-casting for carbon fiber-reinforced plastic (CFRP) laminates by originally designed gyro-driving grinding wheel system. The copper/diamond functionally graded grinding wheel was also originally designed and fabricated by centrifugal sintered-casting to reduce the consumption of abrasive grains in our previous study. Drilling tests were carried out over 50 holes in dry machining. Thrust force was evaluated with force sensor during drilling test. Hole diameter, roundness and roughness were measured to evaluate hole quality. Drill chips were observed by scanning electron microscope (SEM) to investigate chip morphology. Precision drilling without burring and delamination were achieved in CFRP laminates. Good hole-quality was still obtained at 50 holes due to the low thrust force during drilling. Specific three-dimensional drilling process of the gyro-driving grinding wheel system enabled continuous drilling with low thrust force in CFRP laminates.

Copyright (c) 2018 by ASME
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