CFRP铣削力建模研究

碳纤维增强复合材料(Carbon fiber reinforced polymer/plastic,CFRP)由于其不均匀性和各向异性的材料特性,在铣削加工过程中容易出现各种缺陷。铣削力建模有助于探究CFRP的铣削力变化规律、优化加工参数,进而减少缺陷的产生。本文基于多元非线性回归的方法,建立了铣削力系数关于4种影响因素(纤维切削角、瞬时未变形切屑厚度、主轴转速和轴向切深)的函数关系。经过单向CFRP铣削力实验和多向CFRP铣削力实验验证,所建模型可以较准确地预测铣削力变化规律。

Cutting Force Modeling in Milling of CFRP

Carbon fiber reinforced polymer/plastic(CFRP) has the properties of anisotropy and inhomogeneity, which can easily lead to processing defects during milling of CFRP. Modeling of milling force is helpful to explore the changing law, optimize processing parameters, and then reduce the appearance of defects. Based on the nonlinear multiple regression method, the paper establishes the functional relationship between the milling force coefficient and the four influencing factors, i.e. the fiber cutting angle, the instantaneous uncut chip thickness, the spindle speed and the axial depth of cut. Results of unidirectional and multidirectional CFRP milling experiments show that the established model can accurately predict the variations of milling forces.