摘要
采用PCD刀具进行了C/SiC复合材料的铣削加工实验,通过观察加工表面/亚表面损伤,分析了C/SiC复合材料铣削加工表面形成机制,并结合切削力讨论了铣削参数对加工表面形貌和粗糙度的影响。研究结果表明,C/SiC材料以脆性断裂方式实现去除;加工表面存在纤维的层状脆断、拔出和纤维束断裂等现象;碳纤维区域粗糙度随铣削参数的变化规律与表面微观形貌基本一致;提高切削速度能改善表面质量,增大切深会使表面质量严重恶化,每齿进给量对表面质量影响较小。
The milling experiments of C/SiC composite with PCD tools are conducted,and surface formation mechanism is analyzed by observing surface/subsurface damages.The effect of milling parameters on surface topography and surface roughness is discussed with the analysis of cutting force.The results show that C/SiC composite is removed in the mechanism of brittle fracture.Laminated fracture,pullout and fracture in bundle of carbon fiber can be observed on the machined surface.The effect of milling parameters on surface roughness is basically the same with that on surface topography.The higher cutting speed can improve the surface quality,the bigger axial depth of cut will worsen the surface quality and the feed per tooth has no significant influence on surface quality.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2014年第5期701-706,共6页
Journal of Nanjing University of Aeronautics & Astronautics
