基于正交试验的高速切削淬硬模具钢的切削力研究

通过正交设计方案,对淬硬到60HRC的冷作模具钢Cr12MoV进行高速车削切削力试验,分析了切削用量和刀具变量对切削力的影响规律,并建立了切削力的经验公式。得到如下结论:切削用量中,切削速度对切削力影响最小,进给量和背吃刀量对切削力影响较大;三个方向力中,轴向力最小,径向力和主切削力相接近,与常规切削相比,径向力偏大;小刀尖圆弧半径的PCBN刀具是进行高速切削淬硬钢时的理想刀具;经验公式预测值与实测值之间存在约5%-20%的误差。

Cutting Force Research in High-speed Cutting Hardened Die Steel on Orthogonal Experiment

Orthogonal design was applied to cutting force experiment in the high speed turning of Crl2MoV （60HRC） hardened die steel. The influences of cutting parameters and tool variables on cutting forces were analyzed. Then the cut-ting force analytical model was established. Conclusions are as follows, the effect of cutting speed on cutting forces is small, while the effect of feed rate and cutting depth on cutting forces should be considered. For three cutting force compo-nents, Fx force is the minimum, Fy force is close to Fz force and is larger than conventional Fy force. PCBN tool with small comer radius is more suitable for cutting hardened steel at high speed. The analytical model predictions are for 5% - 20% closer to the experimental measurements.