端铣加工面尺寸误差预测

为了精确预测端铣加工面尺寸误差,利用铣削动态力卷积模型,引入表面生成窗概念,并考虑到工件与刀具的变形误差、机床空间误差与刀具偏摆的影响,建立了加工面尺寸误差预测模型。通过在铣床上进行实验,验证了该模型能够正确预测工件尺寸误差及其分布范围,且在铣刀轴向切深、主轴转速和进给速度一定的情况下,增加径向切深不会对工件尺寸误差产生显著影响。

Prediction of Dimensional Error of Machined Face in End Milling Process

In order to accurately predict the dimensional error of the machined face in end milling process, prediction model of dimensional error was established by using dynamic milling force convolution model and introducing concept of surface generation window. The influences of deformation errors of workpiece and tool, and spatial error of machine tool and tool runout were considered. It was validated by end milling experiment, that the model was able to correctly predict dimensional error and its distribution range of the workpiece. Moreover, increasing radial depth of the tool will not have a significant impact on the dimensional error of workpiece with the condition of same axial milling depth of cut, spindle speed and feed rate.