3410 High precision drilling of CFRP plates by method of helical cutting

Abstract

CFRP (Carbon Fiber Reinforced Plastic) has higher specific strength, modulus of elasticity and so on. CFRP is, however, well known as difficult-to-cut material which has very strong physical and mechanical characteristics. Drill-out of CFRP which is one of the most important cutting techniques is currently carried out in the industrial factories. In this research, we tried to make high accuracy drill holes by helical cutting on the CFRP plates. By using the helical method with cemented-carbide ball end mill, high quality holes on the CFRP plates are obtained without burrs, chippings, and so on. Helical cutting method is suitable for drill of laminated material because of low thrust force of drilling tool.