摘要
针对钻削碳纤维复合材料时存在的出入口质量较差问题,提出使用一种新型的平前刀面麻花钻作为钻削刀具对碳纤维复合材料进行钻削,分析螺旋角、顶角和后角等几何角度对轴向力和出入口质量的影响规律。研究表明螺旋角和后角的增加可以减小轴向力,顶角的增加会增大轴向力。入口损伤受顶角与螺旋角影响较大,较大螺旋角和较小的后角可以抑制出口毛刺的形成。最后得出平前刀面麻花钻钻削碳纤维复合材料的钻头最佳角度。
The delamination produced during CFRP drilling will affect its structural strength seriously. Delamination is closely related to the thrust force during drilling hole, which is closely related to the tool, so it is particularly important to choose the tools with appropriate geometric structure. In this paper, the research objects of drill geometry included the helix angle, point angle and clearance angle of plane rake faced twist drills, which was used to investigate the influence law of different geometric angles on the thrust force and drilling quality. What′s more, the influence degree of different geometric angles on the delamination of drilling hole at entrance and exit was also analyzed. The results show that optimum geometry of plane rake faced twist drills for drilling CFRP is the helix angle of about 35°, the point angle of about 120° and the clearance angle of about 12°.
作者
刘礼平
连波
朱学明
周长庚
夏平锋
LIU Li-ping;LIAN Bo;ZHU Xue-ming;ZHOU Chang-geng;XIA Ping-feng(School of Aerospace Engineering,Civil Aviation University of China,Tianjin 300300,China;Faculty of Mechanical Engineering,Tianjin University of Technology and Education,Tianjin 300222,China;Composite Materials Technology Center,China Academy of Aeronautic Manufacturing Technology,Beijing 101300,China;Tianjin Weikende Measurement and Control Equipment Technology Company,Tianjin 300356,China)
出处
《复合材料科学与工程》
CAS
北大核心
2021年第10期74-82,共9页
Composites Science and Engineering
基金
中央高校基本科研业务费(3122019081)。
