摘要
针对双向编织碳纤维增强复合材料钻孔过程中存在的生产效率低,易出现毛刺、撕裂、脱层缺陷等工艺难题,通过设计正交实验和单因素实验进行硬质合金钻头钻削双向编织碳纤维增强复合材料的研究,获得钻削力F随主轴转速n和进给量fr的变化规律。结果表明,轴向力随着进给量fr增加而增大,且进给量fr对轴向力的影响大于主轴转速n的影响,并进一步建立钻削力与转速以及进给量的之间关系式Fz=2 298.472n-0.290fr0.115;通过n和fr即可大致预测钻孔出口侧的撕裂长度:l=-28.5n-0.290fr0.115+3.485;孔壁表面粗糙度随轴向力增加呈小幅下降趋势。这些研究结果可对双向编制碳纤维增强复合材料钻削力和加工质量进行预估,为钻削加工参数的初选提供依据。
Based on the technology problems such as low productivity,appearing burr and tear as well as delamination easily during drilling bidirectional carbon fiber reinforced composite,the orthogonal tests and single factor tests were applied to study the drilling of the bidirectional carbon fiber reinforced composite using cemented carbide drill.The change laws of the drilling force with spindle speed n and feed rate fr were built.The results show that the thrust force increases with the increasing of feed rate fr and the effect of feed rate fr on the thrust is larger than the effect of spindle speed n,and the empirical formula of the drilling force is obtained,which is expressed by Fz=2 298.472· n-0.290fr0.115,then the tearing length can be predicted by l=-28.5n-0.290fr0.115＋3.485;the surface roughness at hole wall decreases slowly with the increasing of the thrust force.Based on the above,the drilling force and drilling quality can be predicted to supply choosing basis in drilling bidirectinal composite.
出处
《粉末冶金材料科学与工程》
EI
2010年第6期580-585,共6页
Materials Science and Engineering of Powder Metallurgy
基金
国家科技重大专项(2009ZX04012-032)
关键词
双向编织复合材料
钻削力
出口撕裂
孔壁形貌
orthogonal carbon fiber reinforced composite
drilling force
tearing length at hole exit
morphology at hole wall
