Carbon fiber-reinforced polymers (CFRPs) have been applied to various fields such as electronic printed circuit boards, aircraft brakes, automobile forks, and machine tool-damped structures due to their low density and high tensile strength. These application components required micro-hole and macro-hole in it for joining. In this research work, a comparison of the experimental investigation on micro- and macro-drill on CFRP using a vertical machining center has been carried out. The input machining control factors were spindle speed and rate of feed, whereas the quality characteristics of drilling CFRP were considered as thrust force, delamination, and overcut. Analysis of variance (ANOVA) and gray relational analysis were employed to identify the most significant factor and optimum process parameters, respectively. Microstructural defects of micro-hole and macro-hole were studied using scanning electron microscopy. Results showed that the rate of feed linearly affected the thrust force and delamination and is inversely proportional to overcut.

碳纤维增强聚合物（CFRP）由于其低密度和高拉伸强度而已应用于各种领域，例如电子印刷电路板，飞机制动器，汽车前叉和机床阻尼结构。这些应用组件在其中需要微孔和大孔才能进行连接。在这项研究工作中，使用立式加工中心进行了CFRP微观和宏观钻孔实验研究的比较。输入的加工控制因素是主轴速度和进给速度，而钻孔CFRP的质量特性被认为是推力，分层和过切。采用方差分析（ANOVA）和灰色关联分析分别确定最重要的因素和最佳的工艺参数。使用扫描电子显微镜研究了微孔和大孔的微观结构缺陷。结果表明进给速度线性影响推力和分层，并且与切削力成反比。