插铣铣削力模型构建及与切削参数的相关性分析

Construction of Cutting Force Model and Correlation Analysis with Cutting Parameters

为了优化插铣加工工艺参数,分析在同一工况下插铣时铣削参数与铣削力和铣削力系数的关系,在已有插铣铣削力模型的基础上,结合具体铣削条件,设计了探究插铣铝合金材料时铣削力系数与铣削速度的关系试验,即通过设计同种工况、不同进给率下,测量插铣不同台阶时的三向铣削力,辨识插铣不同台阶时的剪切力系数与刃口力系数,并根据Pearson相关系数探究铣削力与铣削速度、进给率、铣削深度的相关性。试验证明,每齿进给率和轴向切深均与铣削力高度相关,可以通过改变这两个铣削参数直接控制插铣加工中铣削力的大小,为后续插铣加工研究提供理论模型。同时,插铣铣削力系数中的切向刃口力系数与铣削速度高度相关,径向和轴向刃口力系数与铣削速度显著性相关,切向与径向的剪切力系数与铣削速度则相关性较差,轴向力的剪切力系数与铣削速度显著性相关,为进一步研究插铣过程的参数优化和物理仿真等一系列问题提供了理论依据和实际研究基础。

In order to optimize milling process parameters and analyze the relationship between milling parameters,milling force and milling force coefficient during milling under the same working condition,based on the existing milling force model and combined with specific milling conditions,this paper designed an experiment to explore the relationship between milling force coefficient and milling speed,that is,by designing the same working condition and different feed rate.The three-way milling force during milling of different steps was measured,the shear force coefficient and cutting edge force coefficient during milling of different steps were identified,and the correlation between milling force and milling speed,feed rate and milling depth was explored according to Pearson correlation coefficient.The experimental results show that feed rate and axial depth of cut are highly related to milling force,and the milling force can be directly controlled by changing these two milling parameters,which provides a theoretical model for the subsequent research of milling.At the same time,tangential cutting edge force coefficient is highly correlated with milling speed,radial and axial cutting edge force coefficient is significantly correlated with milling speed,tangential and radial shear force coefficient is poorly correlated with milling speed,and axial shear force coefficient is significantly correlated with milling speed.It provides theoretical basis and practical research basis for further research on a series of problems such as parameter optimization and physical simulation of milling process.