• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2026, Vol. 62 ›› Issue (5): 329-346.doi: 10.3901/JME.260249

Previous Articles    

Modeling and Experimental Study of Droplet Spreading at the Microabrasive/Bone Interface of Bionic Desert Beetles

CHEN Xiaotong1, LI Zhonghao1, YANG Min1, KONG Xianggang1, LIU Mingzheng1, LI Benkai1, MA Xiao1, CUI Xin1, DAMBATTA Y S2, YU Zhenwei3, WANG Guang4, LI Changhe1   

  1. 1. School of Mechanical and Automobile Engineering, Qingdao University of Technology, Qingdao 266520;
    2. Qingdao Binhai University, Qingdao 266555;
    3. Qingdao Hongda Forging Machinery Co., Ltd., Qingdao 266300;
    4. Guohua (Qingdao) Intelligent Equipment Co., Ltd., Qingdao 201620
  • Received:2025-06-20 Revised:2025-11-06 Published:2026-04-23

Abstract: Diamond micro-grinders can rapidly and precisely remove bone tissue in the lesion area, which has been widely applied in orthopedic surgery. However, the technical problems of low spreading wettability at the micro-grinding tool/bone interface and high grinding temperature exist in normal saline spray cooling, which easily causes thermal damage to biological bone tissue. Learning from the principle of water capture and directional transport of desert beetles, constructing biomimetic desert beetle micro-grinding tools is expected to solve the technical bottleneck of thermal damage in bone micro-grinding. Based on this, the dynamic mechanism of droplets on the surface of biomimetic desert beetle hydrophilic/hydrophobic micro-grinding tools is first studied. The droplet spreading mechanism under the synergistic effect of surface energy and Laplace pressure is revealed, and the droplet spreading radius model at the biomimetic micro-grinding tool/bone interface under the influence of factors such as wettability gradient and temperature gradient is constructed. Then, the droplet spreading experiment on the surface of biomimetic micro-grinding tools is carried out to explore the spreading morphology of droplets on the surface of micro-grinding tools, and the droplet spreading radius model on the surface of micro-grinding tools is verified with an average error of 10.34%. Finally, the bone micro-grinding experiment is carried out to explore the influence trends and mechanisms of the bone grinding experimental parameters of biomimetic micro-grinding tools on the grinding temperature. The results show that the biomimetic micro-grinding tools can increase the droplet spreading area and reduce the micro-grinding temperature. It aims to provide theoretical guidance and technical support for reducing the grinding temperature of biological bone micro-grinding.

Key words: microgrinding, grinding temperature, biological bone, bionic tools, droplet spreading

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