Development of novel high-shear and low-pressure grinding tool with flexible composite
Development of novel high-shear and low-pressure grinding tool with flexible composite
复制标题
新型柔性复合材料高剪切低压磨具的研制
DOI：
10.1080/10426914.2020.1843673
复制
发表时间：
2020-11-08
影响因子：
4.8
通讯作者：
Liu, Kui
中科院分区：
文献类型：
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作者：
Tian, Yebing;Li, Linguang;Liu, Kui
据了解，难加工材料的磨削加工存在砂轮粘附、磨削烧伤、表面质量差等问题。本工作基于液体防弹衣原理，采用柔性复合材料开发了一种新型磨具，以提高磨削性能。磨削时，磨具中的颗粒会产生“水簇效应”，以高剪切、低压的方式去除工件表面的微凸。对制备的剪切增稠液（STF）和剪切增稠研磨液（STAF）的流变测试表明，制备的STF和STAF具有优异的剪切增稠性能。此外，还进行了磨削实验以研究新型磨具的性能。 Inconel718工件的表面粗糙度在90分钟内从Ra 1.55μm下降到Ra 0.38μm。原有的预处理痕迹被完全消除，获得了更好的表面光洁度。 Inconel718磨削后表面质量得到很大提高。实验结果验证了新型高剪切低压磨具的有效性。这项工作很有可能为制造业中难加工材料的磨削提供一种替代的新型磨料工具。
It is known that there are some grinding issues for difficult-to-machine materials, such as adhesion of the grinding wheel, grinding burns, and poor surface quality. In this work, a novel abrasive tool which was based on the principle of liquid body armor was developed with flexible composite to improve the grinding performance. During grinding, particles in the abrasive tool will produce a "hydro-cluster effects" to remove the micro convex of the workpiece surface in a high-shear and low-pressure manner. Rheological measurement of prepared shear thickening fluid (STF) and shear thickening abrasive fluid (STAF) showed that the prepared STF and STAF possessed superior shear thickening properties. In addition, the grinding experiments were carried out to investigate the performance of the novel abrasive tool. Surface roughness of the Inconel718 workpiece decreased from Ra 1.55 mu m to Ra 0.38 mu m within 90 min. The original pretreatment marks were completely eliminated and the better surface finish was achieved. The surface quality of Inconel718 was greatly improved after grinding. Experimental results verified the effectiveness of the novel high-shear and low-pressure abrasive tool. This work is quite potential to provide an alternative new abrasive tool for the grinding of difficult-to-machine materials in manufacturing industries.