Carbon fiber reinforced plastics (CFRP) and titanium (Ti) stacks are used widely in aviation

aerospace

automobile and other fields owing to the excellent performance. Because of the difference of material processing characteristics

different parameters are applied in drilling process of CFRP and Ti for satisfactory processing quality. However

CFRP and Ti are usually drilled together for the coaxiality of holes and machining efficiency. There are a lot of problems when drilling CFRP/Ti stacks

such as interface burns of holes

scratch of CFRP and the worse aperture consistency. In order to solve the above problems

a low temperature drilling process was proposed

and the drilling thrust

aperture consistency and surface quality of CFRP/Ti stacks in low temperature were studied by drilling experiments. The results show that the thrust force of CFRP/Ti stacks increases while aperture consistency and surface quality are improved in low temperature

which prove the feasibility of drilling CFRP/Ti stacks in low temperature.