深孔麻花钻静刚度半经验模型研究  

Research on Static Rigidity Semi-empirical Model of Deep-hole Twist Drill

作　　者：曾滔 刘战强[1] 左小陈 汤爱民 Zeng Tao;Liu Zhanqiang;Zuo Xiaochen;Tang Aimin(Zhuzhou Cemented Carbide Cutting Tools Co.,Ltd.,Zhuzhou,Hunan 412007,China)

机构地区：[1]山东大学机械工程学院 [2]株洲钻石切削刀具股份有限公司,湖南省株洲市412007

出　　处：《工具技术》2023年第9期91-97,共7页Tool Engineering

摘　　要：建立深孔麻花钻悬臂梁等效模型,推导麻花钻截面惯性矩、惯性积和极惯性矩的数值计算公式。定义麻花钻截面平均惯性矩,分析麻花钻长度对平均惯性矩的影响,结果表明,麻花钻越长,截面平均惯性矩越接近极惯性矩的1/2。提出弯曲变形和扭转变形修正系数,开展麻花钻弯曲和扭转变形静力学有限元仿真,通过数据拟合辨识变形修正系数,建立麻花钻弯曲、扭转变形修正模型和静刚度模型,实现深孔钻受力变形预测和螺旋槽结构优化设计。The equivalent model of twist drill for cantilever beam is established and the formulas for calculating the moment of inertia,the product of inertia and the polar moment of inertia of twist drill section are deduced.The average moment of inertia of twist drill section is defined and the effect of twist drill length on average moment of inertia is analyzed.The results show that the average moment of inertia for longer twist drill is to half of the polar moment of inertia.Correction coefficients for bending and torsional deformation are proposed,and the bending and torsional deformation model and static rigidity model of twist drll are established through the static finite element simulation and data fiting.This research can be used to predict the deformation of the deep-hole twist drill and to implement the optimal design for helical flute.

关 键 词：深孔麻花钻 螺旋槽 刚度 弯曲变形 扭转变形 

分 类 号：TG713[金属学及工艺—刀具与模具] TH162[机械工程—机械制造及自动化]