抄録
To avoid thermal necrosis and propose new solutions for bone drilling process, it's necessary to investigate temperature distribution in bone with variable drill bit geometries and process parameters. A thermal model is developed to investigate heat generation and transfer during bone drilling process. First, heat generation rate is calculated based on classical machining theory. Then, different governed equations of heat conduction in bone and drill bit with chip flow effect are developed individually. Lumped capacitance in radial direction is utilized to simplify the governed model for the drill bit with chip flow. Last, finite difference method is introduced to solve the governed heat conduction equations with connected boundary conditions. The results show that the maximum temperature is at the interface between drill bit tip and bone and is becoming higher as the drilling depth is increasing. The maximum temperature rise in bone during drilling process is becoming larger as the spindle speed and feed rate is increasing.
