Xu Ziyang, Wang Yongguo
School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200444, China.
Materials (Basel). 2022 May 28;15(11):3862. doi: 10.3390/ma15113862.
Carbon-fiber-reinforced polymers (CFRPs) have been widely used in many industrial fields, such as automobile, aerospace and so on, because of their excellent mechanical properties. However, due to their anisotropy and inhomogeneity, machining CFRPs is a great challenge. In this paper, the slot milling of a plain-woven CFRP with PCD tools is carried out, and the effects of cutting parameters and tool rake angle on cutting force and surface roughness are studied. The results show that the 4° rake angle PCD tool has smaller cutting force than the 0° rake angle PCD tool, but the effect of rake angle on surface roughness is not significant. The concept of equivalent cutting area is introduced to study the variation law of cutting force and surface roughness. It is found that the cutting force and surface roughness increase with the increase in equivalent cutting area, and decrease with the decrease in equivalent cutting area. The removal mechanism of surface materials under different equivalent cutting areas is different, which leads to the difference in surface roughness. Finally, the causes of delamination on the top layer after milling are explained.
碳纤维增强聚合物（CFRPs）因其优异的机械性能，已广泛应用于许多工业领域，如汽车、航空航天等。然而，由于其各向异性和不均匀性，加工CFRPs是一项巨大的挑战。本文采用聚晶金刚石（PCD）刀具对平纹编织CFRP进行槽铣加工，研究了切削参数和刀具前角对切削力和表面粗糙度的影响。结果表明，前角为4°的PCD刀具切削力比前角为0°的PCD刀具小，但前角对表面粗糙度的影响不显著。引入等效切削面积的概念来研究切削力和表面粗糙度的变化规律。研究发现，切削力和表面粗糙度随等效切削面积的增加而增大，随等效切削面积的减小而减小。不同等效切削面积下表面材料的去除机理不同，导致表面粗糙度存在差异。最后，解释了铣削后顶层出现分层的原因。
