端面磨削复合材料管毛刺预测及验证  

Prediction and Verification of Burrs of Face Grinding CFRP Circular Cell

作　　者：田俊超 鲍岩 董志刚[1] 陆冰伟 康仁科[1] 郭东明[1] TIAN Junchao;BAO Yan;DONG Zhigang;LU Bingwei;KANG Renke;GUO Dongming(Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education,Dalian University of Technology,Dalian 116024)

机构地区：[1]大连理工大学精密与特种加工教育部重点实验室,大连116024

出　　处：《机械工程学报》2022年第15期63-74,共12页Journal of Mechanical Engineering

基　　金：国家重点研发计划(2019YFA0708902);中央高校基本科研业务费(DUT20ZD102);中国博士后科学基金(2020T130076);大连市顶尖及领军人才(2020RD02)资助项目。

摘　　要：阵列复材管具有优异的性能,可应用于微波反射器夹层。阵列复材管端面磨削过程中易出现规律毛刺且形成过程不明确。研究以阵列复材管的复合材料管胞元为对象,考虑其宏观结构特征和端面磨削特点定义切出角度和砂轮轴线偏移角,并系统研究在砂轮倒角参数和工艺参数综合影响下,切削截面内砂轮与纤维相互作用关系,揭示毛刺的形成过程并建立毛刺长度预测模型。结果表明:砂轮轴线偏移角、砂轮倒角共同影响切削截面内的砂轮倒角,而切削截面内砂轮倒角与纤维方向角的大小关系、轴向磨削深度共同影响纤维率先发生断裂的位置,该位置与纤维方向角共同影响毛刺的长度。为获得更好的加工质量应优先选用较大倒角的砂轮、较小的砂轮轴线偏移角或使切出角度接近90°,当毛刺不可避免时,优先选用较小的轴向磨削深度。研究成果可为复合材料管端面磨削过程中刀具轨迹规划、刀具设计和工艺参数选择提供指导。CFRP circular cell honeycomb have superior properties and can be used for the interlayer of microwave reflector.In the face grinding process of CFRP circular cell honeycomb,regular burrs are easy to appear and the formation process of burrs is not clear.CFRP circular cell of honeycomb is studied,the exit angle and the grinding wheel axis offset angle is defined considering its macro structural features and face grinding characteristics.Furthermore,the interaction between grinding wheel and fiber in cutting section is systematically studies under the comprehensive influence of chamfered corner of grinding wheel and machining parameters is revealed and the prediction model of burr length is established.The results show that the chamfered corner of grinding wheel in the cutting section is affected by the grinding wheel axis offset angle and the chamfered corner of grinding wheel simultaneously,the position where the fiber breaks first is affected by the relationship between the chamfered corner of grinding wheel in the cutting section and the fiber direction angle and the axial grinding depth,the length of the burr is affected by the position where the fiber breaks first and the fiber direction angle.Meanwhile,in order to obtain better machined surface quality and avoid burr,the grinding wheel with larger chamfer angle and smaller grinding wheel axis offset angle or the exit angle close to 90°are preferred.When burr is unavoidable,smaller grinding axial depth is preferred.The research results can provide guidance for tool path planning,tool design and process parameter selection in the grinding process of CFRP circular cell honeycomb.

关 键 词：碳纤维增强复合材料 端面磨削 毛刺 切出角度 砂轮倒角 

分 类 号：TB332[一般工业技术—材料科学与工程]