切削参数对SiC_p/Al复合材料切削变形的影响

为研究切削参数对SiC_p/Al复合材料切削变形的影响,通过试验测量的切削力和切屑厚度,计算得到SiC_p/Al复合材料的变形区参数,并分析了切削参数对变形区参数的影响规律,同时拟合得到了切削SiC_p/Al复合材料过程中剪切角与摩擦角的关系。研究结果表明:进给量增大,SiC_p/Al复合材料变形系数和剪应变减小,摩擦角减小,剪切角增大,且SiC_p/Al复合材料的摩擦角大于2024Al,剪切角小于2024Al;切削速度增大,SiC_p/Al复合材料变形系数、剪应变都减小,摩擦角减小但是不显著,剪切角增大; SiC_p/Al复合材料φ=B-C(β-γ)中B值大于2024Al,而斜率C(负值)小于2024Al。

Effect of Cutting Parameters on Deformation of Cutting SiC_p/Al Composites

In order to study the effect of cutting parameters on the cutting deformation of SiCp/Al composites,the deformation zone parameters of SiCp/Al composites are calculated by using cutting forces and chip thickness measured experimentally,and the influence of cutting parameters on the parameters of the deformation zone is analyzed.At the same time, the relation between shear and friction angles of the SiCp/Alcomposites is obtained by fitting.The results show that with the increase of feed,the deformation coefficient and shear strain of SiCp/Al composites decrease,the friction angle decreases and the shear angle increases.The friction angle of SiCp/Al composites is greater than 2024Al and the shear angle is less than 2024Al.With the increase of cutting speed,the deformation coefficient and shear strain of SiCp/Al composites decrease,the friction angle decreases insignificantly,and the shear angle increases.The B value of φ=B-C(β-γ) in the SiCp/Al composite is greater than 2024Al,and the slope C(negative value)is less than 2024Al.