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. Drilling technique of CFRP which is one of the most important cutting operations is currently carried out in industrial factories. In this research, we tried to make high accuracy drilling process by helical movement method of cutting tools on the CFRP plates. Cemented-carbide ball-nose end mill is suitable to drill out thin CFRP plates which dimension of L/D (Length per Diameter) is below 0.3. On the other hand, it is not easy to make drill holes on the thick CFRP plate by ball-nose and square end mill because of inefficient evacuation for cutting chips.
