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在本研究中,以轴向切削力Fz为例,通过特殊的试验设计(DOE),将钻削过程简化成定位、切入和正常切削3个阶段,并对切入过程进行等分处理,获得不同轴向切削深度h时的轴向切削力数值,采用相关和回归分析方法,获得经F-检验(显著水平α=0.01)的回归方程,其截距b0为横刃产生的轴向切削力Fch,系数b1为主切削刃产生的轴向切削力Fma。正常切削阶段与主切削刃完全切入时的轴向切削力之差ΔFz即为副切削刃产生的轴向切削力Fmi。在本次测试中,横刃轴向切削力Fch=263.49 N,主切削刃轴向切削力Fma=412.74 N,副切削刃轴向切削力Fmi=108.16 N,分别占比33%、53%和14%。
In this study, taking the axial cutting force Fz as an example, the drilling process was simplified to three stages of positioning, plunging and normal cutting through the special experimental design (DOE), and the plunging process was equally divided to obtain different Axial cutting depth h axial cutting force values, using correlation and regression analysis method to obtain the F-test (significant level α = 0.01) of the regression equation, the intercept b0 axial shear force generated by the chisel Fch , The coefficient b1 is the axial cutting force Fma generated by the main cutting edge. The difference ΔFz between the normal cutting stage and the axial cutting force when the main cutting edge is completely cut in is the axial cutting force Fmi generated by the minor cutting edge. In this test, the axial cutting force Fch = 263.49 N, the main cutting edge axial cutting force Fma = 412.74 N, the minor cutting edge axial cutting force Fmi = 108.16 N, respectively, accounting for 33%, 53% and 14%.