Modeling and experimental validation on temperature diffusion mechanism in high-speed bone milling
Modeling and experimental validation on temperature diffusion mechanism in high-speed bone milling
复制标题
高速骨铣中温度扩散机制的建模和实验验证
DOI：
10.1016/j.jmatprotec.2020.116810
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发表时间：
2020-12
影响因子：
6.3
通讯作者：
Qiu-shi Dong
中科院分区：
文献类型：
--
作者：
Qi-sen Chen;Yu Liu;Qiu-shi Dong
在骨科手术中，骨骼的热损伤会影响假体固定的准确性并延迟术后恢复时间。为了避免高速骨加工中的热损伤，有必要建立加工参数、刀具参数和骨材料温度分布之间的有效关系。基于骨材料的特性和高速加工的特点，提出了一种新的高速骨铣削温度扩散机理模型（TDMM）。根据该模型，在高速骨铣削过程中的热量主要是由骨屑和刀齿之间的摩擦作用产生的。然后将铣刀刃口温度视为一个恒温运动热源，由等效静态热源确定。在移动热源的作用下，确定了骨材料的温度分布。此外，骨材料在不同的加工和工具参数下的热损伤程度进行了评估。其次，建立了高速骨铣削实验平台，以获得准确的切削刃温度和骨材料温度。根据大量的实验测量，发现切削刃和骨材料的理论预测温度值在实验测量的合理误差范围内。实验结果表明，该模型能够合理地预测高速骨铣削过程中切削刃和骨材料的温度。实验结果表明，加工方法，刀具直径，冷却方式，切削层有显着的影响骨材料分布在骨铣削。喷雾冷却法可显著降低骨材料温度。并且切削层外的骨材料温度可以大大低于切削层内的骨材料温度。本研究亦指出，依据该方法可方便医师选择适当的加工参数，并可供工程师进行刀具设计。
In orthopedic surgery, thermal damage of bone affects the accuracy of the prosthesis fixation and delays the postoperative recovery time. In order to avoid thermal damage in high-speed bone machining, it is necessary to establish an effective relationship among machining parameters, tool parameters, and temperature distribution of bone materials. Based on the characteristics of bone material and high-speed processing, this study proposes a novel temperature diffusion mechanism model (TDMM) in high-speed bone milling. According to the model, heat during high-speed bone milling is mainly generated by the friction effect between the bone chip and the cutter tooth. Then the cutting edge temperature of the milling cutter is determined by the equivalent static heat source, and cutting edge is regarded as a moving heat source with constant temperature. Under the action of the moving heat source, the bone material temperature distribution was determined. Moreover, the degree of thermal damage of bone materials under different machining and tool parameters was evaluated. Next, a high-speed bone milling experiment platform was established, in order to obtain accurate cutting edge temperature and bone material temperature. According to a large number of experimental measurements, the theoretical prediction temperature values of the cutting edge and bone materials were found to be within the reasonable error range of experimental measurements. The proposed model was proved to reasonably predict the temperature of the cutting edge and bone materials in high-speed bone milling. Experimental results indicate that the processing methods, tool diameter, cooling method, and cutting layer have a noteworthy impact on bone material distribution in bone milling. Spray cooling method can reduce the bone material temperature significantly. And the bone material temperature outside the cutting layer can be greatly lower than that in the cutting layer. This study also indicates that according to the TDMM, it is convenient for surgeons to select the appropriate machining parameters, and for engineers to optimize tool design.
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影响因子：
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