Prediction of the Surface Roughness in Ultrasonic Vibration-Assisted Grinding of Dental Zirconia Ceramics Based on a Single-Diamond Grit Model.
Prediction of the Surface Roughness in Ultrasonic Vibration-Assisted Grinding of Dental Zirconia Ceramics Based on a Single-Diamond Grit Model.
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基于单金刚石磨粒模型的牙科氧化锆陶瓷超声振动磨削表面粗糙度预测
DOI：
10.3390/mi12050543
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发表时间：
2021-05-10
期刊：
影响因子：
3.4
通讯作者：
Li Z
中科院分区：
文献类型：
--
作者：
Xiao X;Li G;Li Z
超声振动辅助磨削（UVAG）因其在硬脆材料加工中的优异性能而被认为是制作陶瓷义齿的一种上级方法。义齿的表面粗糙度对义齿与天然牙的粘接和磨损性能有着重要的影响。表面粗糙度预测的实现将极大地促进UVAG在牙体修复中的应用。然而，陶瓷UVAG表面粗糙度建模的研究还很有限。本研究综合考虑金刚石磨粒的随机分布、脆性断裂去除和超声振动特性，提出了一个综合的表面粗糙度模型。基于压痕断裂去除机理，建立了材料去除过程的数学模型。引入瑞利概率密度函数来表征磨粒的随机分布。此外，通过对单个金刚石磨粒运动的分析，考虑了超声振动的影响。最后，建立了考虑所有金刚石磨粒的综合模型。最后进行了验证实验。实验结果与模型预测吻合较好。因此，综合模型可以应用于评估表面粗糙度，并可以提供在陶瓷UVAG的表面形成的深入了解。
Ultrasonic vibration-assisted grinding (UVAG) is regarded as a superior method for the fabrication of ceramic dentures, due to its outstanding performance in hard and brittle materials’ machining. The surface roughness of dentures has a critical effect on the bonding and wear performance between dentures and natural teeth. Accomplishing the prediction of surface roughness will promote the application of UVAG in dental restoration significantly. However, the investigation about surface roughness modeling in the UVAG of ceramics is limited. In this study, a comprehensive surface roughness model was proposed with the consideration of the diamond grits’ random distribution, brittle fracture removal, and ultrasonic vibration characteristics. Based on the indentation fracture removal mechanism, the material removal process was modeled. Rayleigh’s probability density function was introduced to characterize the random distribution of the grits. Besides, the ultrasonic vibration was considered via the analysis of the single-diamond grit motion. Finally, the comprehensive model was developed with the consideration of all the diamond grits. Afterward, the verification experiments were carried out. The experimental results agreed well with the model predictions. Therefore, the comprehensive model can be applied to evaluate the surface roughness and can provide an in-depth understanding of the surface formation in the UVAG of ceramics.
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DOI：
10.1016/j.ijmecsci.2017.07.061
发表时间：
2017-11-01
影响因子：
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