本文建立了PCBN刀具在风冷条件下切削淬硬钢的有限元分析模型。利用有限元软件DEFORM-3D对风冷正交切削进行了建模仿真,并对带槽形的菱形刀具进行建模仿真。对不同速度、不同切削厚度下的硬态切削过程进行了分析。结果表明:切削中的冷风有利于降低切削温度,随着切削厚度的增大,风冷的效果越明显,但切削力有所升高。 In this paper, a finite element model of PCBN cutting tool for cutting hardened steel under air-cooled condition is established. The finite element software DEFORM-3D was used to modeling and simulating the wind-cooled orthogonal cutting. The slotted diamond tool was modeled and simulated. Hard cutting process at different speeds and cutting thicknesses was analyzed. The results show that the cold wind in cutting is helpful to reduce the cutting temperature. With the increase of cutting thickness, the effect of air cooling is more obvious, but the cutting force is increased.