Exit-Side Drill Penetration Without Delamination
Slow-motion video shows the effect of a micograin tool coating in drilling CFRP.
Cutting tool maker OSG says a patented coating process keeps the micrograin structure of its diamond coating to less than 1 micron. Coating typically rounds the edge of a tool, but the smaller micrograins produce a coated tool that is sharper. The result, says OSG, is less tradeoff between the tool life of diamond and the delamination that can result from a duller tools. This video shows this. The sharp edge of the small-micrograin diamond-coated tool lets this tool exit the hole much more cleanly.
Creating threaded holes in titanium alloys calls for proper techniques based on an understanding of both the properties of these materials and the peculiarities of the tapping process.
To make the transition to hard turning, you'll need to switch from carbide to CBN inserts, but that is easier (and more economical) than you might think. It's making the jump to much higher surface speeds that might scare you off. It needn't. Here's why.
With macros and canned cycles resident in the CNC on most contemporary turning centers, single point turning of OD threads can seem like almost a default process decision. However, for numerous applications, OD thread rolling has inherent advantages as an alternative to cutting threads.