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插齿是加工齿轮的重要工艺方法,插削力是制定插齿加工工艺的重要依据。为获得插齿过程中的工件材料属性,采用霍普金森压杆试验,获得工件材料高应变(10~2~10~4s~(-1))下的Johnson-Cook(J-C)本构模型。基于工件材料本构模型,通过有限元模拟插齿过程,获得插齿切削力。采用刨削模拟插齿切削,对插齿切削力进行了实测试验。通过对比分析插齿切削力、模拟与试验结果,验证了本构模型和有限元模型及模拟结果的正确性,进而通过有限元数值模拟分析了刀具几何参数和切削参数对切削力的影响规律。文中建立的材料本构模型和插齿切削有限元模型可较准确地预测插齿切削力。
Gear teeth is an important process of processing gear, cutting force is to develop an important basis for tooth processing technology. In order to obtain the material properties of the workpiece during gear insertion, Hopkinson pressure bar test was used to obtain Johnson-Cook (J-C) constitutive model with high strain (10 ~ 2 ~ 10 ~ 4s -1). Based on the constitutive model of workpiece material, the gear cutting force is obtained by simulating the gear inserting process. Using planing simulation gear cutting, measured the cutting force of the gear. By comparing the cutting force, simulation and test results, the constitutive model, the finite element model and the simulation results are validated. The influences of cutting geometry parameters and cutting parameters on the cutting force are analyzed by finite element numerical simulation. The material constitutive model and the gear cutting finite element model established in this paper can predict the gear cutting force more accurately.