Research on the influence of low-frequency vibration-assisted bone drilling process parameters on surface quality and screw stability

This study investigates the influence of process parameters on chip morphology, hole surface roughness, and screw stability in low-frequency vibration-assisted bone drilling. An experimental platform was constructed, and a series of measurements were performed using a high-speed camera, optical microscope, ultra-depth-of-field microscope, surface roughness tester, and electronic universal testing machine. The chip formation process, hole surface topography, surface roughness, and screw pull-out force were systematically analyzed under varying spindle speed, feed rate, input voltage, and vibration frequency. The results indicate that low-frequency vibration-assisted drilling can effectively reduce chip size, improve hole surface quality, decrease surface roughness, and enhance screw pull-out force. In particular, higher spindle speed, lower feed rate, and suitable input voltage and vibration frequency contribute to the optimal hole surface quality and screw stability. This study provides a theoretical basis and technical guidance for optimizing clinical bone drilling procedures, reducing surgical bone damage and improving the success rate of fracture internal fixation surgeries.