Tool reliability of sintered diamond drill bit for processing silicon carbide ceramics based on Bayesian theory
Tool reliability of sintered diamond drill bit for processing silicon carbide ceramics based on Bayesian theory
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DOI：
10.1177/2633366x20923672
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发表时间：
2020-05
影响因子：
2.4
通讯作者：
Wensen Guo;Weiwei Shi;S. Hu;Hong-qun Tang
中科院分区：
文献类型：
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作者：
Wensen Guo;Weiwei Shi;S. Hu;Hong-qun Tang
碳化硅（SiC）陶瓷作为一种超硬非金属材料，在钻孔过程中会引起严重的刀具磨损。为了保证加工质量，钻头必须在失效前提前更换，得不到有效利用，造成严重浪费。针对高硬度非金属材料钻削过程中由刀具磨损决定的刀具可靠性问题，提出了一种基于刀具退化增量分布和伽马过程建模的烧结金刚石钻头加工SiC陶瓷的可靠性分析方法，并基于贝叶斯理论建立了刀具退化增量可靠性模型。采用烧结金刚石钻头进行烧结SiC陶瓷钻削实验，获得退化增量数据。通过可靠性模型偏差率来检验模型的准确性，表明考虑个体差异的可靠性模型更加准确。该研究可为提高非金属脆性材料加工刀具的可靠性提供理论模型和分析方法。
Silicon carbide (SiC) ceramics, as a superhard nonmetallic material, would induce severe tool wear during drilling. To ensure the quality of processing, the drill bits must be replaced in advance before failure, which leads to serious waste without effective usage. Aiming at the tool reliability problem determined by the tool wear during drilling of the high hardness nonmetallic materials, this article proposed a reliability analysis method of sintered diamond drill bit for machining SiC ceramics based on the distribution of tool degradation increment and the modeling of gamma process, and a tool reliability model of degradation increment was established based on the Bayesian theory. The drilling experiment of sintered SiC ceramics was carried out by sintering diamond drill bit to obtain the degradation increment data. The accuracy of the model was tested by the reliability model deviation rate, which indicated that the reliability model with considering individual differences was more accurate. This research can provide a theoretical model and analytical method for improving the reliability of the nonmetallic brittle material processing tools.