Effect of Helical Drill Points on Delamination in Drilling Carbon Fiber Reinforced Plastics (CFRP)

Abstract:

A study of helical drill points for drilling carbon fiber reinforced plastics (CFRP) is presented. A helical drill point has an “S” contour with a radiused crown chisel that reduces the thrust force and make the drills self-centering. The S-shape chisel edge has a lower negative rake angle than a conventional chisel edge, and therefore may cut rather than extrude material. Experiments of drilling CFRP with helical drill points and conventional drill points were conducted. The results indicate that the helical drill points can reduce delamination significantly as compared to the conventional drill points under same cutting condition. Otherwise, delamination size decreases with increasing the cutting speed and increases with increasing the feed

• Periodical: Advanced Materials Research (Volumes 76-78)
• Pages: 618-623
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.76-78.618
• Online since: June 2009
• Authors: Ping Zou, Xu Lei Yang, Xi You Li
• Keywords: Carbon Fiber Reinforced Polymer/Plastic (CFRP), Delamination, Drilling, Helical Drill Point

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