The influence of crescent texture parameters on the axial force when drilling bone

Abstract

In order to reduce bone tissue damage, the effect of crescent texture parameters on the axial force during bone drilling was investigated. The biomimetism micro-texture shape was selected from a bionic point of view. A laser marking machine was used to process biomimetism crescent texture on the rake face of the drill bit, and then a theoretical model of axial force is established to determine the relationship between axial force and texture parameters according to actual chip-tool contact area. A test platform for drilling bone was built to prove the theoretical model. The novelty of the study involved predicting the change of the axial force according to the true chip-tool contact area. The experimental results showed that a biomimetism crescent texture on the rake face of a drilling tool significant reduced the axial force during bone drilling compared with that of a non-textured tool. Within the range of the experiment data, during the stage of drill entry and stabilization, the measured axial force of a micro-textured tool was more stable and the fluctuation in stress was lower, compared to the response from a conventional drilling tool.