Drilling of CFRP/Ti6Al4V Stack Board
Junsuke Fujiwara*, Ryuichi Nagaura*, and Tetsuya Tashiro**
*Department of Mechanical Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
**Department of Mechanical Systems, Osaka Prefecture University College of Technology, 26-12 Saiwai-cho, Neyagawa, Osaka 572-8572, Japan
Drilling experiments with a CFRP/Ti6Al4V stack board were carried out using a TiAlN-coated cemented carbide drill, TiAlCr/TiSi-coated cemented carbide drill, and TiSiN-coated cemented carbide drill. Cutting experiments were carried out under a dry cutting process and water-mist-cooling process. Themain results obtained were as follows. The tool life of the TiAlCr/TiSi-coated cemented carbide drill was the longest among the three coated cemented carbide drills. The tool life under the water-mist-cooling process was longer than that under the dry process. Because the titanium alloy chips were much harder under the water-mist-cooling process, the cutting torque under this process became larger with an increase in tool flank wear compared to that under the dry process.
-  K. Sakuma, Y. Yokoo, and M. Seto, “Study on drilling of GFRP and CFRP (Tool material and Wear),” Trans. Japan Soc. Mech. Eng., Vol.49, No.446, pp. 1799-1805, 1983.
-  S. Yokoi, K. Sakai, Y. Suzuki, and N. Ikeya, “Drilling processing property of CFRP material by various manufacturing methods,” Trans. Japan Soc. Mech. Eng., JSME annual meeting, No.4, pp. 247-248, 2010.
-  M. Hagino and T. Inoue, “Machinabillity of CFRP materials with drilling,” Trans. Japan Soc. Mech. Eng., JSME Tokai Branch Meeting, No.59, pp. 277-278, 2010.