티타늄 합금의 평엔드밀 가공 시 공구 방향에 따른 가공성 평가

Abstract

Titanium alloys are classified as difficult-to-cut materials with poor machinability, leading to a continuous demand for the development of machining methods. For machining titanium alloys, various tool orientations can be employed based on the shape of the workpiece, such as the presence of an inclination angle. In this study, machining tests considering tool orientation were performed using a solid carbide end mill tool. The tool orientation was classified into three categories with inclination angles of 90° (Reference), 45° (Upward), and 135° (Downward). The machining tests indicated that the Reference orientation exhibits the longest tool life and best surface roughness. Conversely, the Upward orientation exhibited the shortest tool life, while the Downward orientation exhibited the poorest surface roughness. When considering the Upward and Downward cases, the contact length between the cutting edge and the material becomes longer due to the inclination angle during machining, which in turn affects cutting performance.