Experimental Study on Planetary Drilling Machinability for CFRP

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Hidetake Tanaka


In this study, we express the locus of cutting edge motion on planetary drilling by computer simulating and clarify volume eliminated by bottom face cutting edge and side face cutting edge. Next we have constructed geometric cutting model of planetary drilling and found zero velocity point on bottom cutting edge which is caused by momentary relation among orbital eccentricity, planetary revolution speed and tool rotation spindle speed. In order to evaluate the influence on shapes of the cutting tool during the planetary drilling, we have focus on the shape of the cutting edge. Planetary drilling tools having several kinds of cutting edges are prepared and demonstrated. Considering the drilling load and chips, the appropriate shape of cutting edge was clarified.


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