采用普通麻花钻和三刃麻花钻对碳纤维增强树脂基复合材料进行了钻削试验, 研究了钻头结构、顶角对钻削轴向力及加工孔内壁粗糙度的影响。结果表明: 普通麻花钻的顶角越大, 钻削轴向力越大; 三刃麻花钻顶角的增大对钻削轴向力没有明显影响; 三刃麻花钻钻头扭转振动引起钻削轴向力的波动明显小于普通麻花钻的, 且前者加工孔的内壁粗糙度小于后者的; 随着顶角的增大, 两种钻头加工的孔内壁粗糙度都得到了显著降低。

A carbon fiber reinforced plastics (CFRP) composite was drilled by twist drill and three flutes twist drill, and the effects of structure and point angle of drill on drilling thrust and roughness of inter wall of holes were studied. The results show that the more of the point angle of twist drill, the large of the drilling thrust, and increasing the point angle of three flutes twist drill had not obviously effects on drill thrust. The volatility of the drilling thrust caused by the tool′s torsion and vibration of the three flutes twist drill obviously less than that of the twist drill, and the roughness of inter wall of holes mechined by the form less than that of the later. The roughness of inter wall of holes mechined by the two drills obviously decreased with the increase of the point angles.