平头立铣过程中的铣削力解析建模及补偿应用

Milling Force Modeling and Compensation Research Based on the Fourier series

建立了一种基于傅立叶级数的铣削力模型用以描述铣削加工过程的物理状态。建立了沿刀具轴向的微元刀刃的铣削力模型,通过傅立叶变换将刀具总的铣削力表示为傅立叶级数形式。推导了通过槽铣实验的平均铣削力回归切削力系数的方法。采用测力仪在数控机床上进行了铣削实验,对比了模型预测值和实验实测值,结果吻合良好;并进行了切削变形的补偿研究,设计实施了侧铣补偿实验,补偿了铣削力造成的铣削变形。

A milling force model based on Fourier series is set up to describe the physical state of NC milling process. This model is established through Fourier transform which turn the periodically milling force into Fourier series form. Linear equations for regressing the cutting coefficients through average milling forces of slot milling experiments are given cutting experiments are done on a NC milling tool with a milling dynamometer. Through the comparison of predicted milling forces and the measured ones, the proposed milling force model is verified. Then a cutting deformation compensation method is carried out, after a side-milling experiment, the cutting deformation caused by milling force is compensated.