Abstract
The study deals with a proposal and experimental study on the tilted planetary motion drilling for CFRP. The authors have modified cutting mechanism principle of the orbital drilling, which named as the tilted planetary motion drilling. Its axis of tool rotation spindle is not parallel to the axis of planetary revolution. The tilted angle is adjustable from 0 to 2 degrees. Because of tool rotation axis is tilted, penetration is not caused by outermost cutting edges but inner cutting edges. If penetration could be occurred, the inner cutting edges penetrate firstly, then the outermost edges enlarge drilled hole and these sequence can avoid generation of delaminations and burrs. The tilted planetary motion drilling has been demonstrated by the practical fundamental drilling experiment by use of a high-speed spindle unit and a lathe as imitating tilted planetary motion. From the experimental result, capability of tilted planetary motion drilling has been realized and no burrs and delaminations are observed on the workpiece.
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