Biomimetic Desert Beetle Microgrinding Tool Flow-field Model and Processability Evaluation

作者：Zhonghao Li, Jiachao Hao, Min Yang, Xiaoming Wang, Yifei Cheng, Zongming Zhou, Feng Jiang, Xiao Ma, Mingzheng Liu, Xin Cui, Yanbin Zhang, Benkai Li, Changhe Li · 发表于：Chinese Journal of Mechanical Engineering · 年份：2025 · DOI：10.1186/s10033-025-01280-0 · 被引用次数：2 · 研究领域：Erosion and Abrasive Machining、Plant Surface Properties and Treatments、Advanced machining processes and optimization

Abstract Microgrinding is widely used in clinical bone surgery, but saline spray cooling faces technical challenges such as low wettability at the microgrinding tool–bone interface, easy clogging of the microgrinding tools, and high grinding temperatures. These issues can lead to bone necrosis, irreversible thermal damage to nerves, or even surgical failure. Inspired by the water-trapping and directional transportation abilities of desert beetles, this study proposes a biomimetic desert beetle microgrinding tool. The flow-field distribution directly influences the convective heat transfer of the cooling medium in the grinding zone, which in turn affects the grinding temperature. To address this, a mathematical model of the two-phase flow field at the biomimetic microgrinding tool–bone interface is developed. The results indicate an average error of 14.74% between the calculated and experimentally obtained airflow field velocities. Next, a biomimetic desert beetle microgrinding tool is prepared. Experiments with physiological saline spray cooling were conducted on fresh bovine femur bone, which has mechanical properties similar to human bone. Results show that, compared with conventional microgrinding tools, the biomimetic tools reduced bone surface temperature by 21.7%, 13.2%, 5.8%, 20.3%, and 25.8% at particle sizes of 150#, 200#, 240#, 270#, and 300#, respectively. The surface morphology of the biomimetic microgrinding tools after grinding is observed and analyzed, revealin...