Solid carbide drills are required that have been developed to withstand the harsh demands of the latest aerospace composites, offering long and consistent tool life to meet tight tolerances time after time. An aerospace part such as a composite wing box can feature hundreds of holes, so achieving an efficient and cost effective process is vital.
The key to successful composite drilling and composite stack drilling lies in the geometrical shape of the drill tips. Here, the design needs to improve hole entrance and hole exit quality on high fibre content materials. Correct tool selection is critical to successful composite hole making. Where splintering or fraying is the problem, a drill such as Sandvik Coromant's CoroDrill® 854 will provide an optimum solution, however, if composite delamination is proving to be the difficulty in resin-rich materials, then CoroDrill 856 should be selected.
In terms of geometric features, small point angles and high rake angles help to improve quality in carbon fibre holemaking as well as reduce axial forces, which is particularly critical on thin-walled surfaces. This will also help with the elimination of burrs and the enhancement of surface finish inside the bore.END AKISMET -->
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