ABSTRACT

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 μm to Ra 0.38 μm 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.

摘要

众所周知，难加工材料存在一些磨削问题，例如砂轮的附着力，磨削烧伤和较差的表面质量。在这项工作中，开发了一种基于液态防弹衣原理的新型研磨工具，该工具具有柔性复合材料，以改善研磨性能。在磨削过程中，研磨工具中的颗粒会产生“水团效应”，以高剪切力和低压方式去除工件表面的微凸。所制备的剪切增稠液（STF）和剪切增稠磨料液（STAF）的流变测量表明，所制备的STF和STAF具有优异的剪切增稠性能。另外，进行了研磨实验以研究新型研磨工具的性能。Inconel718工件的表面粗糙度在90分钟内从Ra 1.55μm降至Ra 0.38μm。完全消除了原始的预处理痕迹，并获得了更好的表面光洁度。研磨后，Inconel718的表面质量大大提高。实验结果证明了新型高剪切低压磨具的有效性。这项工作很有潜力为制造行业中难加工材料的磨削提供一种替代性的新型磨具。实验结果证明了新型高剪切低压磨具的有效性。这项工作很有潜力为制造行业中难加工材料的磨削提供一种替代性的新型磨具。实验结果证明了新型高剪切低压磨具的有效性。这项工作很有潜力为制造行业中难加工材料的磨削提供一种替代性的新型磨具。