抄録
Built-up Layer (BUL), produced by accumulating workpiece on the tool rake face, has the tool protective effect and the smaller depth of overcutting during cutting of metal material. The main objective of this paper is to clarify the formation mechanism of BUL with different cutting tools during cutting of titanium alloy. To clarify the influences of coating characteristics on BUL’s formation mechanism, dry cuttings of Ti-6Al-4V with three different cutting tools (uncoated, PVD coated, CVD coated carbide tools) were conducted. From the results, as expected, it is confirmed that BUL can form on the different tools’rake face and it can protect the tool rake face from wear to some extent. The coating characteristics have the great influences on the BUL formation process and the size of BUL. Meanwhile BUL plays a great role on the fall-off of coating. Finally, the ability of BUL to increase the cutting tool performance was also analyzed.
