Volume 39, Number 2, April 2021
|Page(s)||334 - 340|
|Published online||09 June 2021|
Study on high quality surface finishing technology of pre-spinning nozzle in additive manufacturing
School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
2 AECC Shanghai Commercial Aviation Engine Manufacturing Co., Ltd, Shanghai 200241, China
Through the simulation of abrasive flow in the inner cavity of the superalloy pre-spinning nozzle made by additive manufacturing, the special abrasive polishing tool is optimized and the surface polishing technology of the inner cavity of typical structure test pieceis studied. Through comparison of the surface morphology before and after polishing, it can be concluded that the abrasive flow has a considerable removal effect on the powder sticking effect, spheroidizing effect, step effect, slag hanging phenomenon and residual support on the surface of parts, but it has a limited effect on the surface pit of the substrate. After polishing, the surface roughness of the inner cavity of parts decreasea from Ra 3.1397 μm to Ra 0.5805 μm, and the surface roughness of blade position decreases from Ra 4.8473 μm to Ra 0.3606 μm. Through the range analysis, it is found that the effect intensity of the processing parameters on the surface roughness of the parts is in order of the processing time, processing pressure and abrasive particle size.
通过进行增材制造高温合金预旋喷嘴内腔磨料流动仿真研究，优化了磨粒流抛光专用工装，开展了增材制造预旋喷嘴典型结构试验件内腔磨粒流表面光整工艺研究。通过抛光前后表面形貌对比，认为磨粒流对增材制造零件表面粘粉效应、球化效应、阶梯效应、挂渣现象以及残留支撑均有较好的去除作用，但是对基体表面凹坑内的光整效果有限，抛光后零件表面粗糙度由Ra3.139 7 μm降至Ra0.580 5 μm，叶片表面粗糙度由Ra4.847 3 μm降至Ra0.360 6 μm。通过极差分析，发现工艺参数对零件表面粗糙度的影响效果强度依次为加工时间、加工压力、磨粒粒径。
Key words: additive manufacturing / pre-spinning nozzle / abrasive flow / numerical simulation / surface quality
关键字 : 增材制造 / 预旋喷嘴 / 磨粒流 / 数值模拟 / 表面质量
© 2021 Journal of Northwestern Polytechnical University. All rights reserved.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.