前切れ刃形状を直線にしたボールエンドミルによるCFRP板のヘリカル加工に関する研究

抄録

CFRP is well known as difficult-to-cut materials which has very strong physical and mechanical characteristics. In the application for aviation industries, CFRP are remarkably used for many parts of airplane structures. High-accuracy and high-efficiency drilling techniques of CFRP plate are required. In the study drilling by the helical cutting processes has been performed on the CFRP composite plates with two kinds of cemented carbide ball-nose end mills which have sigmoid curve and straight line of bottom cutting edges, respectively. It is found that the machining accuracy is affected by the tool shape on the bottom cutting edge of ball-nose end mill.