玻璃纤维增强聚丙烯复合材料制孔损伤

为抑制玻璃纤维增强聚丙烯复合材料（GF/PP）制孔损伤并提高其制孔效率，本文通过钻削实验获得多种进给速度下的GF/PP复合材料钻削轴向力和出口温度，使用高速摄影设备对刀具钻出过程进行在线观测，研究出口材料去除过程及其损伤成因，分析进给速度对GF/PP复合材料制孔损伤的影响规律。结果表明：GF/PP复合材料的钻削出口温度在低速进给时显著升高，在高速进给时基本趋于稳定；出口撕裂是重要的出口损伤形式，成因是大片毛刺受副切削刃的撞击和撕挤，进给速度过高或过低均会加剧损伤； 0°毛刺在低速进给时较严重，入口撕裂在高速进给时较严重。

Drilling damage of glass fiber reinforced polypropylene composites

In order to diminish drilling damage of glass fiber reinforced polypropylene composite (GF/PP) and improve its drilling efficiency, thrust force and outlet temperature during drilling GF/PP composites for various feed rates were measured by drilling experiments, and outlet processes of drilling were instituted observed with high-speed photography equipment. Outlet material removal process and damage mechanisms were demonstrated. Effect of feed rates on GF/PP composites drilling damage was analyzed. The results show that the outlet drilling temperature is high with low feed rates and becomes relatively steady as feed rates increasing; Outlet tearing is mainly outlet damage and caused by the tearing of large burrs by the cutting edges; It becomes severe with a too high or low feed rate. 0° burr is serious with low feed rates; Inlet tearing is serious with high feed rates.