Investigation of drilling 2D C f∕C–SiC composites with brazed diamond core drills

Liu, Qiong; Huang, Guoqin; Xu, Yongchao

Drilling carbon fiber reinforced silicon carbide composites still forms a big challenge for machining because of their special braided structure and anisotropy. In this study, through the drilling of 2D inline-formulaCf∕C–SiC composites, two kinds of brazed diamond core drills with different abrasive distributions were compared. The results showed that the drilling force and torque of the two drills decreased with the increase in the spindle speed and increased with the increase in the feed speed. Under the same drilling conditions, the drilling force and torque of the brazed diamond drill with the ordered abrasive distribution were far lower than those of the brazed diamond drill with the random abrasive distribution. Also, the quality of the holes drilled by the drill with the ordered abrasive distribution was better than that of the holes drilled by the drill with the random abrasive distribution, which is attributed to the uniform abrasive spacing provided by the drill with the ordered abrasive distribution.

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Liu, Qiong / Huang, Guoqin / Xu, Yongchao: Investigation of drilling 2D Cf∕C–SiC composites with brazed diamond core drills. 2020. Copernicus Publications.

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