Process behaviour of micro-textured CVD diamond thick film cutting tools during turning of Ti-6A1-4V

摘要

Currently,an efficient machining of high-performance materials,such as titanium alloy Ti-6A1-4V,represents a challenge in manufacturing-For the reduction of high cutting temperatures,micro-textured CVD diamond thick film cutting tools establish new potentials regarding the process productivity-The application of micro-textures allows a reduced contact area between chip and tool in order to decrease the generation of heat.Furthermore,a direct application of lubricant into the cutting zone is possible.The present study investigates the influence of micro-textured CVD diamond thick film cutting tools on the resulting process forces,chip formation as well as maximum cutting volumes during turning process.Part of the investigations was a variation of micro-texture trajectory with micro-textures parallel to the major cutting edge,perpendicular to the bisector of corner angle ε and curved along the cutting edge.The analyses showed that both positive and negative effects occur using micro-textures.The forces can be reduced by 14 % whereas the use of micro-textures leads to higher feed forces Ff by 21 % as well as an additional notch effect in the micro-texture bottom.