Development of electroplated cBN ball nose-endmill tool for helical boring of CFRP plate

Abstract

The demand for carbon fiber reinforced plastic (CFRP) has been increasing in various fields. Therefore, there is a need for high-quality and high-efficiency processing of this material, which requires trimming and drilling of excess CFRP after molding. In this study, a cubic boron nitride electroplated ball nose-endmill was developed. This novel tool can be switched between cutting and grinding modes, thus eliminating the need for tool change. In this paper, the phenomenon of delamination at the hole exit is discussed based on the relationship between the change in axial feed rate (a parameter of helical motion) and cutting force.