摘要
芳纶纤维增强复合材料极难加工,且材料本身具有各向异性,因此其在加工后表面质量并不理想,常会出现分层、烧焦、拉毛等缺陷。针对上述问题,本研究对芳纶纤维增强复合材料分别进行了微铣削和铣磨试验,对比分析了两种加工试样的表面粗糙度和微观形貌以及两种工艺的切削机理。结果表明:微铣削加工后表面粗糙度随着进给速度的增加呈现先增后减的趋势;铣磨加工后表面粗糙度随进给速度的增加而增大,且远大于微铣削的表面粗糙度。试验发现,微铣削加工中拉毛现象明显;而铣磨加工表面存在大量白色凝结物,通过在加工过程中引入风冷工艺可有效减少凝结物的生成,从而有效地提高表面质量。
A ramid fiber reinforced polymer is an extremely difficult material to be processed.Due to the anisotropy of the material,it often causes defects such as stratification,burning and burr when it is processed in a general manner.In view of the above problems,the micro-milling and grin-ding experiments were carried out respectively.The cutting mechanism of the two processes was analyzed,and the surface roughness and micro-morphology of the two samples were compared.The results show that the surface roughness after micro-milling increases first and then decreases with the increase of feed rate.The surface roughness of grinding increases with the increase of feed rate,which is much higher than that of micro-milling.It is found that the burr phenomenon in the micro-milling process is obvious,and there is a large amount of white condensation on the surface of grinding process.The formation of condensate can be reduced and surface quality can be improved effectively by introducing an air-cooling process during the processing.
作者
马英怡
刘玉德
石文天
韩冬
侯岩军
MA Yingyi;LIU Yude;SHI Wentian;HAN Dong;HOU Yanjun(School of Materials Science and Mechanical Engineering,Beijing Technology and Business University,Beijing 100048,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2020年第16期16177-16181,共5页
Materials Reports
基金
国家自然科学基金(51505006
51975006)
“十三五”国家重点研发计划项目(2018YFD0400800)。
关键词
芳纶纤维增强复合材料
微铣削
铣磨
表面形貌
切削机理
表面粗糙度
aramid fiber reinforced polymer
micro-milling
grinding
surface topography
cutting mechanism
surface roughness
作者简介
马英怡,北京工商大学材料与机械工程学院机械工程系研究生,主要研究先进制造技术;刘玉德,北京工商大学材料与机械工程学院,教授,硕士研究生导师,机械系主任,机械工程系教学实验中心主任。2010年7月毕业于北京理工大学,获得工学博士学位。目前主要从事先进制造技术方面的研究。先后参与完成国家“863”项目1项、国家“七五”、“九五”、“十五”攻关课题、“十二五”国家科技支撑计划项目,主持或参与完成省部级课题7项,横向课题10余项,发表论文70余篇,出版论著4部。目前为国家自然基金项目网上评审专家、科技部院所项目评审专家、北京市机械创新设计大赛评委,liu_yude@163.com。
