基于热力耦合的硬态车削过程有限元模拟及分析

Finite element simulation and analysis of hard turning process based on thermal-mechanical coupling

为了探究热力耦合作用下不同切削参数对加工过程的影响,为优化工艺参数提供数据支撑,利用Deform有限元分析软件构建了热力耦合作用下的正交切削有限元模型,模拟GCr15钢硬态车削加工过程,对车削加工中的切削力、温度场和应力场分别进行动态分析。结果表明:硬态切削加工过程中主切削力最大;工件表面的等效应力和应变随切削深度和切削速度的增加而增加;工件表面温度是一个快速升温和快速冷却的过程,并且工件表面温度最高,沿深度方向逐渐减小。

Using Deform finite element analysis software,the orthogonal cutting finite element model under thermal mechanical coupling was constructed,the hard turning process of GCr15 steel was simulated,the cutting force,temperature field and stress field in the turning process were dynamically analyzed,and the influence of different cutting parameters on the cutting process under thermal mechanical coupling was explored,which provided guidance for the optimization of process parameters.The results showed that the main cutting force was the largest in the process of hard cutting.The equivalent stress and strain of workpiece surface increased with the increase of cutting depth and cutting speed.The temperature of workpiece surface was a process of rapid heating and cooling,and the temperature of workpiece surface was the highest and gradually decreased along the depth direction.