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以热力耦合和温度场模型、材料本构关系及断裂准则等数学模型为理论基础,采用人工加密网格和软件自划分网格两种不同的方法,对自行开发的硬质合金三维复杂槽形重车削刀片的切削过程进行了有限元模拟仿真,并对仿真结果进行了试验验证。研究结果表明:在不同的切削条件下,采用人工加密网格,主切削力的仿真精度在14%～20%左右,而采用软件自划分网格,主切削力的仿真精度达到30%以上;另外,温度方面的仿真,采用人工加密网格比软件自划分网格的仿真结果更符合金属切削原理中切削温度的相关理论。故对重型刀片进行有限元分析时,采用人工加密网格的方法更有利于定性分析和找到刀片优化设计的正确方向。
Based on the mathematical models of thermodynamic coupling and temperature field, material constitutive relation and fracture criterion, two different methods, artificial encrypted grid and software divided grid, The cutting process of heavy turning blade was simulated by finite element method, and the simulation results were tested. The simulation results show that the simulation accuracy of the main cutting force is about 14% ~ 20% under different cutting conditions, and the simulation accuracy of the main cutting force is over 30% by using the software. In addition, the simulation of temperature, the use of artificial encryption mesh than the software from the mesh simulation results more in line with the principle of cutting metal cutting theory of temperature. Therefore, the finite element analysis of heavy blade, the method of using artificial encryption grid is more conducive to qualitative analysis and find the right direction of blade optimal design.