Bone drilling is an indispensable and demanding operation among many orthopaedic operations. A dedicated drill bit that can achieve low-trauma and self-centring drilling is in urgent need. In this study, a three-step orthopaedic low-traumatic drill bit design was proposed. In order to evaluate the drilling performance of the proposed drill, comprehensive comparison tests were carried out with various commercial medical drills in terms of skiving force, thrust force, temperature rise, and surface quality. The experimental results show that the proposed three-step drill design with the optimal point angle, a small chisel edge, transition arc and web thinning can obtain lower and more stable thrust force, slighter bending force, smaller temperature rise, and higher hole quality compared with the commercial drill bits. The proposed drill shows satisfactory drilling performance and has great application potential in clinical surgery.

在众多骨科手术中，骨钻是必不可少且要求较高的手术。迫切需要一种能够实现低创伤和自定心钻孔的专用钻头。在这项研究中，提出了一种三步式骨科低创伤钻头设计。为了评估所提出的钻头的钻孔性能，在切削力、推力、温升和表面质量方面与各种商用医用钻头进行了综合比较测试。实验结果表明，所提出的具有最佳钻尖角、小横刃、过渡圆弧和腹板减薄的三步钻设计可以获得更低和更稳定的推力、更轻微的弯曲力、更小的温升和更高的孔质量。与商业钻头。