Drilling CFRP Thermosets Using Mounted Points

Abstract:

Highly abrasive nature of carbon fibres and material-related problems like fibre or fibre bundle pullouts, matrix micro cracks and especially delamination of single or multiple laminate layers can be regarded as major problems when machining CFRP. This paper presents an approach using mounted points for drilling of fibre reinforced thermosets. The axial and thermal loads were recorded and quality criterions like the surface roughness, diameter deviation and the delamination at the tool exit side were quantified. Furthermore, an approach to improve the grinding process is presented. Results indicate that using mounted points are suitable for drilling operations in case of thermoset laminates.

• Periodical: Advanced Materials Research (Volume 325)
• Pages: 363-368
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.325.363
• Online since: August 2011
• Authors: Dirk Biermann, M. Feldhoff
• Keywords: Carbon Fiber Reinforced Polymer/Plastic (CFRP), Carbon Fibre Reinforced Thermosets, Drilling, Grinding, Mounted Point

References

[1] Hocheng, H. and H. Y. Puw: On drilling characteristics of fiber-reinforced thermoset and thermoplastics. International Journal of Machine Tools and Manufacture, 32 (1992) 4, pp.583-592.

DOI: 10.1016/0890-6955(92)90047-k

[2] König, W., C. Wulf, P. Grass and H. Willerscheid: Machining of Fibre Reinforced Plastics. CIRP Annals - Manufacturing Technology, 34 (1985) 2, p.537–548.

DOI: 10.1016/s0007-8506(07)60186-3

[3] Chen, W. C.: Some experimental investigations in the drilling of carbon fiber-reinforced plastic (CFRP) composite laminates. International Journal of Machine Tools and Manufacture, 37 (1997) 8, p.1097–1108.

DOI: 10.1016/s0890-6955(96)00095-8

[4] Davim, J. P. und P. Reis: Drilling carbon fiber reinforced plastics manufactured by autoclave - experimental and statistical study. Materials and Design, 24 (2003) 5, p.315–324.

DOI: 10.1016/s0261-3069(03)00062-1

[5] Klocke, F. and C. Würtz: PCD in the machining of fibre-reinforced materials. Industrial Diamond Review, 59 (1999) 580, p.65–70.

[6] P.C. Upadhyay, J., S. Lyons: On the evaluation of critical thrust for delamination-free drilling of composite laminates. Journal of Reinforced Plastics and Composites 18 (1999) 14, p.1287–1303.

DOI: 10.1177/073168449901801402

[7] Krishnaraj, V., S. Pradeep and S. Vijayarangan: An Experimental and Statistical Study on the Effect of Trepanning Tool and Twist Drill on Forces and Hole Quality in Machining GFRP Composites. International Journal for Manufacturing Science Production, 7 (2006).

DOI: 10.1515/ijmsp.2006.7.1.25

[8] König, W. and P. Grass: Quality Definition and Assessment in Drilling of Fibre Reinforced Thermosets. CIRP Annals - Manufacturing Technology, 38 (1989) 1, p.119–124.

DOI: 10.1016/s0007-8506(07)62665-1

[9] König, W. and S. Rummenhöller: Spanende Bearbeitung faserverstärkter Kunststoffe. Machining of fibre reinforced plastics. Technica, 40 (1991) 10, p.75–81.

[10] Mohan, N, S. Kulkarni and A. Ramachandra: Delamination analysis in drilling process of glass fiber reinforced plastic (GFRP) composite materials. Journal of Materials Processing Technology, 186 (2007) 1–3, p.265–271.

DOI: 10.1016/j.jmatprotec.2006.12.043

[11] Faraz, A., D. Biermann und K. Weinert: Cutting edge rounding: An innovative tool wear criterion in drilling CFRP composite laminates. International Journal of Machine Tools and Manufacture, 49 (2009) 15, p.1185–1196.

DOI: 10.1016/j.ijmachtools.2009.08.002

[12] J. Sacks, W. J. Welch, T. J. Mitchell, and H. P. Wynn: Design and analysis of computer experiments, Statistical Science, 4 (1989) 4, p.409–435.