Study on Batch Deep-hole Drilling Technology of Carbon Fiber Reinforced Plastics

Abstract To meet assembly requirements, carbon fiber reinforced plastics (CFRP) generally require mechanical processing, of which the most common form is drilling. As a result increasing quantity use and growing structural complexity CFRP, demand for batch high-precision hole making becoming increasingly urgent. However, existing research mostly focused on small-batch small-thickness drilling samples. With customized PCD drill bit, this study investigates effects large-batch failure forms bit quality holes drilled. The results show that (1) chip adhesion great importance to in process making; (2) fluid cutting facilitates cooling, lubrication, removal thereby dramatically reducing tool wear; (3) dry leads micro expansion so drilled have slightly larger diameter than bit; (4) addition support plates at exit position can effectively avoid defects such as tear delamination.