基于ABAQUS的40CrNi4Mo1V稳态切削过程有限元模拟

Simulation of Steady State Cutting of 40CrNi4Mo1V Based on ABAQUS

切削过程有限元分析是利用数学近似的方法对刀具与工件的切削状态进行模拟。应用ABAQUS有限元分析软件对45钢金属稳态切削过程进行了有限元模拟,采用了Johnson-Cook本构模型和Johnson-Cook分离准则,针对不同刀具前角、不同切削速度,对切削过程进行模拟,在输出应力和应变云图以及切削力曲线的基础上,对模拟结果进行分析和讨论,得到了带状切屑形成的动态仿真结果,分析了切削速度及刀具前角对切削过程的影响。通过分析9组参数的仿真结果得到了如下结论:在第1变形区和第2变形区,应力应变较大,且较集中;在切削过程中,切削力逐渐增大,最后保持在某一个值附近波动,达到稳定状态;切削力随刀具前角的增大而减小,随切削速度的增大波动变得剧烈。模拟结果表明,切削仿真与理论以及工程实际相符。

The finite element analysis of the cutting process was to simulate the cutting state of cutting tools and parts by using mathematical approximation,ABAQUS finite element analysis software was used to simulate the metal steady-state cutting process of 45 steel,and the Johnson-Cook constitutive model and Johnson-Cook separation criterion were used to simulate cutting engineering for different tool rake angles and different cutting speeds,and we analyzed and discussed the simulation results on the basis of output stress and strain cloud diagrams and cutting force curves.The dynamic simulation results of band-shaped chip formation were obtained,and the influence of cutting speed and tool rake angle on the cutting process was analyzed.The following conclusions were obtained by analyzing the simulation results of 9 sets of parameters,the stress and strain were relatively large and concentrated in the first and second deformation zones.During the cutting process,the cutting force gradually increased,and finally kept fluctuating around a certain value until reaching a stable state.The cutting force decreased with the increase of the rake angle of the tool,and the fluctuation became severe with the increase of the cutting speed.The simulation results showed that the simulation was consistent with the actual theory and engineering practice.