非对称刃口形状因子对表面粗糙度的影响规律

Effect of Asymmetric Edge Shape Factor on Surface Roughness

刀具刃口钝化能够提高刀具使用寿命、改善切削性能和已加工表面质量,满足高速高效切削加工的要求。采用刀具钝化的刃口多为非对称刃口,通过设计相应的正交铣削实验,研究非对称刃口形状因子、主轴转速、每齿进给量、轴向切深和径向切深等铣削参数在硬质合金立铣刀铣削45号钢时工件表面粗糙度的变化规律。结果表明:当主轴转速为3200r/min,每齿进给量0.08mm/tooth,轴向切深1.0mm,径向切深2.4mm,非对称刃口形状因子为0.78时能获得最小的表面粗糙度。采用回归方法建立了铣削参数对表面粗糙度影响规律的预测模型,并通过方差分析验证了预测模型显著性。

Tool edge preparation can improve tool life,cutting performance and machined surface quality.The cutting edge of the tool prepared is mostly asymmetric cutting edge.By designing the corresponding orthogonal milling experiment,the asymmetric blade shape factor,spindle rotation speed,feed per tooth and axial cutting are studied.Milling parameters such as deep and radial depth of cut The surface roughness of the workpiece during the milling of No.45 steel by carbide end mill.The results show that when the spindle speed is 3200 r/min,the feed per tooth is 0.08 mm/tooth,the axial depth is 1.0 mm,the radial depth is 2.4 mm,and the asymmetrical edge shape factor is 0.78.Roughness.The regression model was used to establish the prediction model of the influence of milling parameters on surface roughness,and the significance of the prediction model was verified by analysis of variance.