With the increasing requirement of high-strength and light-weight materials in the aircraft manufacturing field, carbon fiber reinforced plastic (CFRP) composites have been widely applied in the manufacturing of structural and functional components because of their good fatigue resistance, high specific stiffness/strength, good shock absorption, and other characteristics [
1–
3]. For instance, approximately 50% of the main structural components of Boeing 787 are made of CFRP composites [
4]. In aircraft manufacturing processes, composite components can realize near-net shape manufacturing [
5]. However, millions of holes must be machined on them for bolt and rivet connections to facilitate their assembly [
6,
7]. Thus, CFRP drilling is indispensable, and the hole quality directly affects the assembly quality of aircrafts. However, the machinability of CFRP composites under the drilling is extremely poor because of their inherent anisotropy, low interlamination strength, and abrasive characteristics [
8–
11]. Under the action of axial cutting force, serious defects, such as delamination, tearing, burrs, and glass transition of resin, are easily generated. Among them, delamination is the primary threat because it deteriorates the mechanical and fatigue strengths of the materials around the holes. In addition, carbon fiber with high hardness has a severe pressing and friction effect on the cutting edge and flank surface of drills, resulting in shortened drill bit life.