Experimental study of design and manufacture for CFRP bamboo rat tooth bionic drill bit

The section of bamboo eaten by bamboo rats is smooth and clean, which is due to the unique lower front teeth of bamboo rats. Based on this, a new tool was designed to reduce the defects in CFRP processing. The new bionic tool with a diameter of 6 mm is compared with the existing dovetail and fine-tooth tool and the new bionic tool with a diameter of 12 mm. The results indicate that, compared to the dovetail-fine-tooth tool, the biomimetic tool exhibits smaller axial forces and layering factors, with a slower defect formation rate. The biomimetic tool shows a significant inhibitory effect on defect formation, and larger diameter tools achieve better machining results.