基于灰色关联分析的CFRP/Ti6Al4V叠层材料螺旋铣孔工艺参数优化

Multi-Objective Optimization of Helical Milling Process for CFRP/Titanium Alloy Stacks Based on Taguchi Grey Relational Analysis

采用田口法设计了CFRP/钛合金叠层材料铣削试验,以转速、进给量、螺距为设计变量,以复合材料的孔径误差度、表面粗糙度及损伤因子为输出特性指标分析铣削试验。在田口试验的基础上运用灰色关联及主成分分析对叠层材料的复合材料加工进行多目标优化,先后计算出输出特性指标的信噪比、主成分及灰色关联度,最后分析了铣削参数对灰色关联度信噪比、均值响应的影响。铣削CFRP/钛合金叠层材料复合材料时最优加工参数是转速2000r/min、进给量0.02mm/r、螺距0.15mm。

To improve the hole-making quality for CFRP/Ti6Al4V stacks and optimize the helical milling process parameters,experiments were designed and implemented based on the Taguchi method.The spindle rotation speed,feed rate and pitch were taken as the design variables in the experiments.The hole diameter error,surface roughness and damage factor in the composite material layer were taken as the output indicators of the Taguchi model.Based on the Taguchi experimental results,the grey relational analysis and principal components analysis were adopted to optimize the helical milling process parameters.The influences of helical milling parameters on the signal noise ratios,principal components and the grey correlation degrees of output indicators were analyzed.The experiment results show that the optimal helical milling parameters are spindle speed 2000 r/min,feed rate 0.02 mm/r,and pitch 0.15 mm.