Comparative analysis of PCD drill designs during drilling of CFRP laminates

Date
2015
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Source Title
Proceedings of the 15th CIRP Conference on Modelling of Machining Operations, CMMO 2015
Print ISSN
2212-8271
Electronic ISSN
Publisher
Elsevier
Volume
31
Issue
Pages
316 - 321
Language
English
Type
Conference Paper
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Abstract

As a result of increased use of CFRPs in the aerospace industry, the machining of CFRPs has been studied extensively. The majority of these studies consider drilling of CFRPs, since it is the most common process in the machining of structural parts used in aircraft. It has been shown that drilling process parameters and drill geometry significantly influence the quality of holes. In this study, a systematic approach has been used to compare the influence of drill geometry on process outputs such as drilling forces, torques and tool wear. Custom-made double point angle polycrystalline diamond (PCD) drills from the same manufacturer were used in the experiments. The advantage of this approach is that it eliminates the drill material and edge preparation effects on the experimental measurements, thus helps reveal the influence of drill geometry on the process outputs. The pros and cons of different drill designs are discussed and an appropriate design is identified for the drilling of thick CFRP laminate considered in this study.

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Keywords
Diamond tool, Drilling, Fiber reinforced plastics, Aerospace industry, Cutting tools, Diamond cutting tools
Citation
Published Version (Please cite this version)