中文摘要：

通过初始屈服应力、应变硬化模量等材料特性参数,建立了不同硬度Cr12MoV淬硬钢的Johnson-Cook本构模型,对多硬度淬硬钢的铣削加工过程进行了数值模拟,分析了切削速度、切削深度、工件硬度等因素对铣削力的作用规律,揭示了多硬度拼接淬硬钢的铣削力特征。多硬度拼接淬硬钢铣削加工的实验结果验证了有限元模型的正确性,对于铣削加工参数优化具有一定的指导作用。

英文摘要：

Using initial yield stress, strain hardening modulus and other materials parameters, a Johnson-Cook constitution model of Cr12MoV hardened steels with different hardness was established. The milling processes of hardened steels with single and different hardness were numerically simulated by Johnson-Cook model. Effects of cutting speed, cutting depth, hardness of the workpieces on cutting force were analyzed, which could further reveal characteristics of milling force with hardened steels assembled with different hardness. Experiment results of milling forces verified the established finite element model was reasonable, which provided a certain guiding significance for optimizing the cutting parameters selection of harden steels assembled with different hardness steel.