Removal Mechanism of Abrasive Jet Polishing with a Novel Nozzle
Removal Mechanism of Abrasive Jet Polishing with a Novel Nozzle
复制标题
新型喷嘴磨料射流抛光的去除机理
DOI：
10.1088/1742-6596/2198/1/012025
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Yuan Q
中科院分区：
文献类型：
--
作者：
Yuan Q
针对硬脆零件表面抛光的高精度、低损伤要求，提出了一种新型喷嘴磨料射流抛光工艺。通过对喷嘴罩与工件相互作用区射流流动的数值模拟，研究了磨料射流抛光的去除机理。模拟结果表明，护罩使磨料射流的速度大大提高，射流方向基本平行于工件表面。通过这样的设计，磨料射流的法向力被最小化以减少工件表面的冲击损伤。此外，稳定的磨料射流确保了平滑的加工。对典型的硬脆材料石英玻璃零件进行了切削加工实验。实验结果表明，磨料射流抛光过程中，材料的去除主要依靠工件表面的剪切和刮擦，而不是机械冲击作用，这与模拟结果相一致。
In view of the high-precision and low-damage requirements for surface polishing of hard and brittle components, an abrasive jet polishing process using a novel nozzle with specifically designed shroud was proposed. The removal mechanism of abrasive jet polishing was investigated by simulating the jet flow in the interaction area of the nozzle shroud and workpiece. The simulation results indicate that the velocity of the abrasive jet increases greatly by the shroud and the direction of the jet is aligned almost parallel to the workpiece surface. With such a design, the normal force of the abrasive jet is minimized to reduce the impact damage of the workpiece surface. Further, the stabilized abrasive jet insures a smooth machining. The machining experiments were performed on the quartz glass component, a typical hard and brittle material. The results of the shrouded abrasive jet polishing experiments show that the material removal mainly relied on the shearing and scratching of the workpiece surface rather than the mechanical shock impacts, which is consistent with the simulation findings.