阶梯钻钻削Ti6Al4V过程的切削力与残余应力仿真分析  

Simulation Analysis of Cutting Force and Residual Stress in Ti6Al4V Process of Step Drilling

作　　者：王明海 张健 王奔 郑耀辉 刘标[3] 董志 Wang Minghai;Zhang Jian;Wang Ben;Zheng Yaohui;Liu Biao;Dong Zhi(Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学机电工程学院 [2]沈阳航空航天大学航空制造工艺数字化国防重点学科实验室,沈阳市110136 [3]中航工业沈阳飞机工业集团有限公司 [4]空装驻沈阳地区第一军事代表室

出　　处：《工具技术》2022年第5期56-59,共4页Tool Engineering

基　　金：国家自然科学基金(51875367);辽宁省兴辽英才计划(XLYC2007011);辽宁省自然科学基金(2020-MS-223);沈阳市青年科技创新(RC190072);中国博士后科学基金(2020M670790)。

摘　　要：基于ABAQUS软件针对Ti6Al4V的钻削过程进行三维有限元仿真,得到轴向力曲线和应力分布云图。研究阶梯钻相对于普通麻花钻对钻削轴向力的减小作用,并在此基础上,采用单一变量法,设置不同的台阶角度和第一级钻头直径,研究两因素对轴向力和残余应力的影响规律。仿真试验结果表明,相同孔径情况下,阶梯钻产生的轴向力小于普通麻花钻,残余应力水平更低;对比不同台阶角度的阶梯钻发现,台阶角度为90°的阶梯钻产生轴向力更小,残余应力水平更低;在台阶角度为90°时,第一级钻头直径取4.6mm时的毛刺高度最小,残余应力水平也相对较低。在实际生产过程中,可以通过改变台阶角度和第一级钻头的直径来提高工件质量。Based on ABAQUS,a three-dimensional finite element simulation of Ti6Al4V drilling is performed,and the axial force curve and stress distribution cloud diagram are obtained.The effect of step drills on the reduction of axial force of drilling compared with ordinary twist drills is studied,on this basis,different step angles and first-stage drill bit diameters are set,and the effects of two factors on the axial force and residual stress are studied by a single variable method.The simulation experiment results show that,under the same aperture,the axial force generated by the step drill is smaller than that of the ordinary twist drill,and the residual stress level is lower.By comparing the step drill with different step angles,the axial force of the step drill with a step angle of 90°is smaller and the residual stress level is lower.Under the premise that the step angle is 90°,the burr height of the step drill with the first-stage drill bit diameter of 4.6mm is the smallest,and the residual stress level is relatively low.In the actual machining process,the quality of the workpiece can be improved by changing the step angle and the diameter of the first-stage drill.

关 键 词：有限元仿真 阶梯钻 钛合金TI6AL4V 轴向力 残余应力 

分 类 号：TG506.9[金属学及工艺—金属切削加工及机床] TH161[机械工程—机械制造及自动化]