to avoid splintering and is also good for CFRP/aluminum stacked materials. Another standard drill specializes in drilling resin-rich CFRPs. It has a double-angled cutting geometry which gives it soft entry and exit capability and so minimizes delamination. Further dedication is available through tailor- made options. A diamond-like coating is an alternative on carbide drills to make available a versatile, low-cost tool which is regrindable.
Cutting tools for drilling CFRP materials and CFRP/ metal stacks are selected for machines that range from automated CNC machines and robots to portable operator hand tools.
machines and power-feed setups. One drill is best for fiber- rich materials with extra capability to minimize tendencies for fraying in holes. It has spurs at the drill periphery to cut fibers,
A more recent drill type for CFRPs and stacked materials is based on vein technology. This integrates the PCD edge in the carbide drill body. It is an advanced high-tech method, based on a patented process developed during the past couple of decades and makes the best use of the hard, wear- resistant PCD edge in a tougher carbide shank. The PCD edge is made part of the drill at a sufficient distance away from the drill tip to allow the application of a high-strength braze joint. The tool geometry is ground, leaving the edge shielded to a variable extent by the carbide part of the drill.