碳纤维增强复合材料新钻型钻削制孔试验研究  

Experimental Study on Drilling of New Drill Bits for Carbon Fiber Reinforced Plastics

作　　者：苏飞 袁亿 蒋骁捷 邓朝晖 孙富建 SU Fei;YUAN Yi;JIANG Xiaojia;DENG Zhaohui;SUN Fujian(Intelligent Manufacturing Institute of HNUST,Hunan University of Science and Technology,Xiangtan 411201;Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material,Hunan University of Science and Technology,Xiangtan 411201;Engineering Research Center of Advanced Mining Equipment,Ministry of Education,Hunan University of Science and Technology,Xiangtan 411201)

机构地区：[1]湖南科技大学智能制造研究院,湘潭411201 [2]湖南科技大学机电工程学院,难加工材料高效精密加工湖南省重点实验室,湘潭411201 [3]湖南科技大学,教育部先进矿山装备工程研究中心,湘潭411201

出　　处：《宇航材料工艺》2019年第6期53-60,共8页Aerospace Materials & Technology

基　　金：国家自然科学基金(51805164);博士启动基金(E56122);难加工材料高效精密加工重点实验室开放基金(E21753)

摘　　要：碳纤维增强复合材料制孔中极易产生毛刺、分层等制孔缺陷,本文以硬质合金材料和PCD材料设计制造了两种结构类似的新钻型,对比分析了其制孔缺陷形成过程以及在不同工艺参数条件下轴向力和制孔缺陷的变化规律。结果表明:从两种钻型的轴向力时变曲线能明显区分钻削的8个阶段,其中扩削刃的扩孔阶段和第二扩削刃单独参与钻削阶段的轴向力最低,两种钻型的第二扩削刃Ⅳ对制孔缺陷的显著减小有着极为关键的作用;直线刃新钻型的制孔效果要优于圆弧型的,但随着主轴转速和进给速度的增大,其抑制毛刺缺陷的能力将降低;与硬质合金新钻型相比,PCD新钻型在抑制制孔缺陷方面具有绝对优势。The burrs and the delamination defects are easy to be generated during the drilling of carbon fiber reinforced plastics(CFRP).In this paper,two types of new drills with the similar structures are designed and manufactured by employing the tungsten carbide material and the PCD material.The defects formations and the variations of the thrust forces as well as the defects under different drilling conditions are investigated.The results show that the drilling processes of these two structures can be obviously distinguished eight stages,according to the time-variable thrust forces.Both of the thrust forces in the drilling period of reamer edge and in the drilling period of the 2nd counterboring edge are minimal.Additionally,the 2nd counterboring edgesⅣof the two structures play an extremely crucial role for reducing the defects.The drilling effect of the linear drill structure is better than that of the arc-shaped drill structure,but the ability to restrain the burrs may be weakened with the increasing of the spindle speed and the feed speed.Compared to the carbide drill bits,the PCD drill bits have the absolute advantage for suppressing the defects.

关 键 词：碳纤维复合材料 钻削 制孔缺陷 钻型结构 

分 类 号：TQ327[化学工程—合成树脂塑料工业] V258.3[一般工业技术—材料科学与工程]