二维编织复合材料在正交切削中的切削力和加工表面质量研究

STUDY ON MACHINING FORCES AND MACHINED SURFACE QUALITY OF PLANE WOVEN-FABRIC CFRP IN ORTHOGONAL CUTTING EXPERIMENT

二维编织碳纤维复合材料因其具有优异的力学性能和耐疲劳、耐冲击等特点被广泛用于制造各类复合材料结构件中。但是由于二维编织碳纤维复合材料的多相性和特殊的纤维结构,其机械加工性能与传统金属材料和单向纤维复合材料差异较大。为了研究二维编织碳纤维复合材料的切削性能,提高加工效率和加工后的表面质量,基于正交切削实验对二维编织碳纤维复合材料在切削过程中的切削力进行测试,并利用金相显微镜和粗糙度轮廓仪来表征加工表面质量。实验结果显示,正交切削过程中纤维方向角度对切削力的大小影响巨大,当切削速度提高和切削深度降低时,复合材料展现了更好的切削性能,并且加工后的表面质量更高。

2-D plane woven-fabric carbon fiber reinforced polymer（ CFRP） is widely used in manufacturing composite structural parts owing to its excellent mechanical property,fatigue and impact resistance. However,because of the inhomogeneity and the fiber structure,the machinability of woven-fabric CFRP has significant differences from metal,alloy materials and unidirectional CFRP. In order to study the machinability of woven-fabric CFRP and to improve the machining efficiency and surface quality,an orthogonal cutting experiment was carried out to measure the values of cutting forces of the woven-fabric CFRP with varying conditions and a metallographic microscopy and a roughness profiler were utilized to characterize the surface quality of each machined workpiece. The results show that the fiber orientation angle has a huge influence on cutting forces. The increase of the cutting speed and the decrease of the cutting depth can lead to a better machinability and surface quality of the woven-fabric CFRP.