随着机械工程学在医学领域的应用日益加深,骨钻孔已经成为骨外科手术中一个必不可少的操作步骤,但随之引起的钻孔温度过高的问题需要进一步解决.一旦骨钻孔周围的组织被加热到高于温度临界点50℃时就会引起骨细胞坏死,这意味着骨细胞的永久性死亡.经过长期研究发现,骨钻孔过程中的温度过高的问题是多种影响因素共同作用的结果,其主要受主轴转速、进给量以及轴向力等钻削参数的影响.主要对骨外科手术中的主轴转速、进给量以及轴向力等钻削参数对骨钻孔温度的影响进行理论分析,并用相关实验证实理论分析结果.结果表明:在低转速范围内进行骨钻孔时,主轴转速对骨钻孔温度的影响最为显著,且骨钻孔温度随主轴转速的增加而升高;进给量和轴向力对骨钻孔温度的影响相似,骨钻孔温度随着进给量和轴向力的增加而降低.
As the application of the knowledge from mechanical engineering to medicine is growing daily,bone drilling has become an indispensable operation steps in orthopaedic surgery.While,there is a temperature problem needs to be further solved that bone necrosis will appear if the bone tissues around the drill hole was heated to a temperature higher than the temperature point at 50℃,which means the death of bone cells permanently.After long study it found that the problem of high temperature in the process of bone drilling is the result of joint action of influential factors,such as the spindle speed,feed and the axial force.It mainly analyzes the spindle speed,feed and axial force for the influence of the drilling temperature when drilling bone and use related experimental results confirm the theoretical analysis.The results show that:for bone drilling in low speed range,the spindle speed affects the bone drilling temperature significantly,and bone drilling temperature increases with the increase of spindle speed; the effect of feeding and axial force on bone drilling temperature is similar and bone drilling temperature decreases with the increase of feed and axial force.