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对立方氮化硼(CBN)刀具干式硬车冷作模具钢Cr12MoV切削过程进行了有限元仿真研究。运用Johnson-Cook(J-C)模型和J-C切屑分离准则建立了物理仿真模型,利用Deform-3D软件模拟了切屑从局部剪切失稳到断裂的过程,得到了不同切削用量三要素组合下的切削力数值。分析了切削速度、进给量、切削深度对切削力的影响,建立了单一因素对切削力影响的经验公式。结果表明:切削深度对切削力的影响最大,其次是进给量,切削速度的影响最小。
The finite element simulation of Cr12MoV cutting process of CBN hard dry-cold die steel was carried out. The physical simulation model was established by using Johnson-Cook (JC) model and JC chip separation criterion. Deform-3D software was used to simulate the process of chip shear destabilization from local shear to fracture, and the cutting forces under different combinations of three cutting forces Value. The influence of cutting speed, feed rate and depth of cut on cutting force is analyzed. An empirical formula of single factor on cutting force is established. The results show that the cutting depth has the greatest influence on the cutting force, followed by the feed rate and the cutting speed.