Performance of Diamond and Silicon Carbide Wheels on Grinding of Bioceramic Material Under Minimum Quantity Lubrication Condition
Performance of Diamond and Silicon Carbide Wheels on Grinding of Bioceramic Material Under Minimum Quantity Lubrication Condition
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DOI：
10.1115/1.4037940
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发表时间：
2017-12
影响因子：
4
通讯作者：
P. Anand;N. Arunachalam;L. Vijayaraghavan
中科院分区：
文献类型：
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作者：
P. Anand;N. Arunachalam;L. Vijayaraghavan
烧结和预烧结氧化锆等先进陶瓷材料经常用于生物医学应用，其中需要微量润滑 (MQL) 辅助磨削来实现良好的表面光洁度，而不是传统的溢流冷却液。然而，冷却不足和砂轮堵塞是 MQL 磨削过程中存在的主要问题，这取决于工件材料的类型和所使用的砂轮。本研究旨在确定 MQL 条件下预烧结氧化锆砂轮在磨削力、比能、表面完整性和砂轮磨损方面的性能。在相同条件下使用碳化硅（SiC）和金刚石砂轮两种不同类型的砂轮进行了实验。结果表明，与传统的 SIC 砂轮相比，金刚石砂轮在 MQL 条件下提供了更好的表面光洁度并减小了切向力。这是由于金刚石砂轮中砂轮负载的减少。与传统SiC砂轮相比，金刚石砂轮的比能量降低，材料去除率更高。金刚石砂轮磨出的表面呈现出精细的磨痕，表面光洁度较好。计算得出的金刚石砂轮的 G 比百分比比 SiC 砂轮高 77%。这是由于颗粒的滑动和金刚石砂轮中较小的砂轮负载造成的。讨论了相应砂轮之间的成本差异，以提高磨削过程的生产率。
Advanced ceramic materials like sintered and presintered zirconia are frequently used in biomedical applications, where minimum quantity lubrication (MQL) assisted grinding is required to achieve a good surface finish instead of conventional flood coolant. However, insufficient cooling and wheel clogging are the major problems that exist in the MQL grinding process, which depends upon the type of work piece material and the grinding wheel being used. The present study is to determine the performance of the grinding wheels on presintered zirconia under MQL conditions in terms of grinding forces, specific energy, surface integrity, and wheel wear. Experiments are conducted with two different types of grinding wheels as silicon carbide (SiC) and diamond grinding wheels under the same condition. The results indicated that the diamond wheel provided a better surface finish and reduced tangential force under MQL condition, compared to the conventional SIC wheel. This was due to the reduction of wheel loading in the diamond grinding wheel. The specific energy of diamond grinding wheel was reduced with higher material removal rate compared to the conventional SiC wheel. The ground surfaces generated by the diamond grinding wheel showed fine grinding marks with better surface finish. The percentage of G-ratio calculated for the diamond wheel was higher than the SiC wheel by 77%. This was due to the sliding of the grains and less wheel loading in the diamond wheel. The cost difference between the corresponding wheels was discussed to improve the productivity of the grinding process.