Boron-doped CVD diamond micro-end mills for machining titanium

摘要

In industry micro-milling tools made of cemented carbide are widely used. However, these micro-milling tools suffer from fast and random tool breakage during the machining of hard to machine materials. Therefore, in preliminary work micro-milling tools with cutting edges made of boron doped chemical vapour deposition (bdCVD) diamond were developed. In this work new micro-milling tools were successfully applied for machining titanium grade 2. Comprehensive cutting tests were carried out to analyse the influence of the spindle speed n, the feed per tooth f_t and the depth of cut a_p on the surface roughness. Further experiments addressed the wear behaviour of the developed micro-milling tools. After a path length l_c of 10 m a maximum width of flank wear land VB_(max) of 29 μm were observed.