微细铣削过程中刀尖径向总跳动度的实验研究

Research on the Tool-point Radical Run-out of Micro Milling Process

微细铣削过程中,刀尖径向总跳动度与每齿进给量在同一量级,其影响切削过程切削厚度,从而影响切削过程切削力。文章基于轴向铣微孔实验分析了微细铣削过程中主轴转速和刀具悬伸量对刀尖径向总跳动度的影响规律,采用线性回归最小二乘估计法建立刀尖径向总跳动度预测模型,并对预测模型进行显著性检验和拟合度检验,检验结果表明:预测模型可用于切削参数范围内刀尖径向总跳动量的预测。

In micro milling process,the tool-point radical run-out is comparable with the feed per tooth and will affect the chip thickness,ultimately impact the cutting forces. In this paper,micro drilling hole tests are carried out to analyze the influence principle of the spindle speed and the tool overhang on the tool-point radical run-out; and based on the test results,the tool point radical run-out prediction model is built by using linear regression least square estimation method. In addition,the significance test and fitting degree test are conducted on the prediction model,which showthat the prediction model is efficient for predicting the toolpoint radical run-out in the range of test cutting parameters.