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.
Running rotary milling cutters at the proper speeds and feeds is critical to obtaining long tool life and superior results, and a good place to start is with the manufacturer's recommendations. These formulas and tips provide useful guidelines.
Simple process considerations can increase your productivity in milling titanium alloys.
Cutting holes by interpolating a face milling cutter may be a better process choice for many rough and even finish boring operations. Software improvements and better cutter designs allow expanding use of the versatile face mill for hole making.