Influence of parameters on temperature rise and chips morphology in low-frequency vibration-assisted bone drilling

Abstract

In orthopedics and surgery, bone drilling is an important operation for inserting screws and fixing prostheses. A nonnegligible problem which can affect post-operative recovery is the thermal necrosis. For this problem, the method of low-frequency vibration-assisted drilling (LFVAD) was applied in the process of bone drilling in this paper. The influences of parameters (feed rate, rotational speed, vibration frequency and amplitude) on the cutting performances (cutting temperature and chip morphology) were investigated. The results indicate that LFVAD can produce lower temperature compared with conventional drilling (CD). In LFVAD, rotational speed and vibration amplitude are more important parameters on the drilling temperature and chip morphology compared to feed rate and vibration frequency. In addition, according to the trajectories of the cutting edge of drill bit, a mathematical model of heat generation and dissipation was developed in LFVAD.

Keywords: Bone drilling; Chip morphology; Cutting parameters; Low-frequency; Temperature rise.