New solid-carbide drill for CFRP-metal stacks

NEW materials are demanding new solutions. In the aerospace industry, for instance, research is focused on maximizing strength while minimizing weight by using stacks of composite fiber-reinforced polymers (CFRP) sandwiched between titanium or between other materials. This provides essential performance at reduced weight for wings, fuselages, cockpits, and many other components.

New stack drill from Kennametal for aerospace composite/titanium stacks can operate with through-coolant or without for superior chip evacuation

Due to the substantially different mechanical properties of carbon fibers and metals, however, drilling fastener holes efficiently challenges cutting tools by requiring high wear resistance and optimum tool geometries. Keeping holes high-quality and burr-free is critical.

In response, Kennametal is introducing its all-new stack drill from for aerospace composite/titanium stacks can operate with through-coolant or without for superior chip evacuation. The B55_DAL Drill for drilling CFRP-metal stacks in hole diameter ranges of 3/16-5/8? (4.763-15.875mm). The drill can be applied in all combinations of stacks: CFRP-Ti-Al as well as CFRP-Ti, CFRP-Al, and also straight Ti or Al. These drills can operate with standard through coolant, MQL, or even dry.

The new solid-carbide drill′s double-angle point design provides excellent centering capability and the sharp edge to cleanly cut CFRPs in the top layer of stacks and cleanly exit the titanium or aluminum side without burrs. The fine-grain solid-carbide BeyondTM KN15TM grade is highly polished for superior chip evacuation even with MQL or dry operation.
A broad range of diameters and length variations are available to accommodate all holemaking operations, even those using robots or automated drilling units. In addition, the new stack drills can be reground to original process specifications, making these new tools even more cost-efficient. Nike Hypervenom Phantom II FG