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Precision drilling and countersinking in composites presents new challenges in Aircraft assembly. A new self feeding drilling system has been developed to drill superior hole and countersink quality and offer substantial savings in composite assembly. The HP-Drilling system includes a drill motor with integrated vacuum, simplified and less costly template design and drill bits for CFRP and Aluminium stack- ups lasting 800 to 3000 holes. The automatic drilling feeder with an adapter is inserted manually into the drilling template bushing. After activating the starter button the drilling unit is locked in the template. A hollow piston compresses the components together before the drill bit advances with adjustable feed rate to drill the hole and countersink in one step (Figure 1).

A new system for composite drilling and tastening has been developed, which shows considerable cost savings. The precision holes and countersinks can be produced automatically with the special drilling unit in one set-up similar to using an automatic riveter. Chips and drilling dust can be removed through the closed, self-contained tool and disassembly for cleaning and deburring of holes is not required. Fasteners can be installed through a template.

A new system for composite drilling and fastening has been developed, which shows considerable cost savings. The precision holes and countersinks can be produced automatically with the special drilling unit in one set-up similar to using an automatic riveter. Chips and drilling dust can be removed through the closed, self-contained tool and disassembly for cleaning and deburring of holes is not required. Fasteners can be installed through a template.