PCD微细铣磨刀具切削力建模与加工性能研究  

Research on Cutting Force Modeling and Cutting Performance of PCD Micro Milling-grinding Combined Machining Tool

作　　者：杜宇超 梁志强[1] 王飞 李娟 刘月红 赵旭[3] 苏志朋 马悦 陈锐 王西彬[1] DU Yuchao;LIANG Zhiqiang;WANG Fei;LI Juan;LIU Yuehong;ZHAO Xu;SU Zhipeng;MA Yue;CHEN Rui;WANG Xibin(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081;Inner Mongolia North Heavy Industry Group Co.,Ltd.,Baotou 014030;Xi'an Institute of Electromechanical Information Technology,Xi'an 710065)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]内蒙古北方重工业集团有限公司,包头014030 [3]西安机电信息技术研究所,西安710065

出　　处：《机械工程学报》2024年第19期298-309,共12页Journal of Mechanical Engineering

基　　金：国家自然科学基金(52375400);转化应用(D44F9A65,2B0188E1);内蒙古重点研发计划(2022YFHH0121)资助项目。

摘　　要：提出了一种0°侧刃后角的PCD微细铣磨刀具结构,构建了单刃单磨粒正交切削仿真模型,分析了其铣磨复合加工机理。建立了同时考虑切削刃剪切力和后刀面磨削力的切削力模型,根据顺铣和逆铣下刀具结构和切削参数之间的关系确定了切入、切出角的表达式和切削刃与工件的接触情况。在此基础上通过实验拟合剪切力系数与磨削力系数,实现了铣磨刀具瞬时切削力的预测,并在TC4钛合金上开展了切削力模型验证实验,验证了构建的切削力模型能够有效的预测铣磨复合加工中的切削力。进一步在硬质合金工件上开展了铣磨刀具性能测试,结果表明,相比常规结构的PCD微细铣刀,所研制的PCD微细铣磨复合刀具能够有效提升加工质量。A PCD micro milling-grinding combined machining tool structure with 0°side edge rake angle is proposed.The simulation model of single-edge and single-abrasive orthogonal cutting is constructed,and the mechanism of milling-grinding combined machining is analyzed.A cutting force model considering cutting edge shear force and tool flank face grinding force is constructed based on the micro-element method.According to the relationship between cutting tool structure and cutting parameters under up-milling and down-milling,the expression of cutting angle and the contact between cutting edge and workpiece are determined.On this basis,the prediction of the instantaneous cutting force of the mill is realized by fitting the shear force coefficient and grinding force coefficient through experiments,and cutting force model verification experiments are carried out on titanium alloy TC4.The experimental results show that the established cutting force model can effectively predict the cutting force in milling-grinding combined machining.The milling-grinding combined machining tool performance tests are further carried out on cemented carbide workpiece.The results show that compared with conventional PCD micro end mill,the developed PCD milling-grinding combined machining tool can effectively improve machining quality.

关 键 词：PCD铣磨刀具 铣磨复合加工 切削力模型 刀具性能 

分 类 号：TG714[金属学及工艺—刀具与模具]