Constrained abrasive jet polishing with a tangentially aligned nozzle shroud
Constrained abrasive jet polishing with a tangentially aligned nozzle shroud
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DOI：
10.1007/s00170-022-08988-6
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发表时间：
2021-11
期刊：
影响因子：
--
通讯作者：
Q. Yuan;Xun Chen;Donghui Wen
中科院分区：
文献类型：
--
作者：
Q. Yuan;Xun Chen;Donghui Wen
为了提高硬脆零件的表面抛光质量和效率，提出了一种具有特殊设计的护罩的新型磨料射流抛光喷嘴。通过对喷嘴与工件相互作用区射流流动的数值模拟，研究了该喷嘴下磨料射流的去除机理。模拟结果表明，护罩的存在大大提高了磨料射流的速度，使射流方向接近平行于工件表面，从而减小了对工件表面的冲击损伤。对石英玻璃这一典型硬脆材料进行了约束磨料射流抛光（CAJP）实验，结果表明，材料去除主要依靠工件表面的剪切和刮擦，而不是机械冲击，这与模拟结果一致。
In order to improve surface polishing quality and efficiency for hard and brittle components, a novel nozzle with specifically designed shroud was proposed for an abrasive jet polishing process. The removal mechanism of the abrasive jet under such a nozzle was investigated by simulating the jet flow in the interaction area of the nozzle shroud and workpiece. The simulation results show that the speed of the abrasive jet increases greatly by the shroud and the direction of the jet is aligned near parallel to the workpiece surface to minimize impact damage to workpiece surface. The constrained abrasive jet polishing (CAJP) experiments were conducted on the quartz glass component, a typical hard and brittle material, showing 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.