Investigation on drilling-grinding of CFRP

doi:10.1007/s11465-009-0008-y

Front Mech Eng Chin

2009, Vol. 4

Issue (1) : 60-63 https://doi.org/10.1007/s11465-009-0008-y

RESEARCH ARTICLE

Investigation on drilling-grinding of CFRP

Yanming QUAN(

), Wenwang ZHONG

School of Mechanical Engineering, South China University of Technology,Guangzhou 510641, China

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Abstract

It is difficult to machine polymer matrix composites reinforced by carbon fibre, and the hole-making process is the most necessary machining process for composite plate products. Conventional drills have a very short life in the drilling of this kind of composites and the quality of the hole is very poor. In this paper, the cemented or plated diamond core tools are tested to make holes in carbon fibre/epoxy composite plates. The effects of machining parameters, cooling and chip removal on the tool life, and the hole quality are investigated. Results indicate that the material removal mechanism of the two kinds of diamond tools is not like the cutting effect of the conventional solid twist drilling but similar to that of grinding. Satisfactory effects in making holes in the composites are obtained— quite acceptable machined hole quality, low costs, and long wear-resistant endurance.

Keywords composites drilling-grinding cemented/plated diamond tool life machined quality

Corresponding Author(s): QUAN Yanming,Email:meymquan@scut.edu.cn

Issue Date: 05 March 2009

Cite this article:

Yanming QUAN,Wenwang ZHONG. Investigation on drilling-grinding of CFRP[J]. Front Mech Eng Chin, 2009, 4(1): 60-63.

URL:

https://academic.hep.com.cn/fme/EN/10.1007/s11465-009-0008-y
https://academic.hep.com.cn/fme/EN/Y2009/V4/I1/60

Fig.1 Top: Plated diamond core drill; Middle: Cemented diamond core drill; Bottom: Plated solid drill

Fig.2 Plated core drill and work piece, no pad is used

Fig.3 HSS twist drill wear badly

Fig.4 Long cracks in hole exit made by HSS twist drill

Fig.5 Hole exits made by plated solid drill

Fig.6 Hole exits made by plated core drill (upper row) and by cemented core drill (bottom row; the first left one is a hole core)

Fig.7 Plated core drill and cemented core drill after making 60 holes severally

Fig.8 Fig. 8 Bad hole exits resulting from faster feed (upper row: made by cemented core drill; bottom row: made by plated core drill)

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