Study of thrust force and torque in drilling carbon fibre reinforced plastics(CFRP) using twist drill brazed diamond

The Composites are difficult machining materials which widely used in aerospace industry due to their excellent mechanical properties. Tool wear and delamination are considered the major concern in manufacture the parts and assembly. The thrust force and torque affect the tool life and delamination mostly. This paper investigated the drilling force and torque of carbon fibred composite with carbide drilling tools brazed diamond. The experiments were carried out under air cooling cutting conditions and the regulation of the drilling force influenced by the feed rate and cutting speed was obtained. The exponential formula of drilling force and torque were obtained through regression analysis method.