金属增材制造格栅零件磨粒流抛光

发布时间：2018-04-03 17:49

  本文选题：增材制造(AM)　切入点：球化效应　出处：《航空学报》2017年10期

【摘要】：增材制造(AM)技术对成型复杂结构零件有显著优势,但以选区激光熔融技术为代表的金属增材制造技术固有的"粉末粘附"、"球化效应"所导致的毛糙表面,使零件难以满足使用要求。采用混合粒径磨料介质对增材制造铝合金格栅外表面及细小内孔进行一体化抛光试验研究。通过分析磨粒流加工过程各阶段的微观形貌和表面轮廓测量结果等来研究材料去除过程中零件表面形貌、材料去除和表面粗糙度变化。试验结果表明,磨粒流加工方法能够有效消除"球化效应"导致的零件表面的金属球团簇聚集现象,并能够对增材制造格栅零件外表面和内孔实现有效的抛光,格栅表面粗糙度从初始的14μm降至1.8μm。
[Abstract]:Amm) technology has significant advantages in forming complex structural parts, but the rough surface caused by "powder adhesion" and "spheroidizing effect" is inherent in metal augmentation manufacturing technology represented by selective laser melting technology.Make it difficult for the parts to meet the requirements.An integrated polishing experiment was carried out on the external surface and fine inner hole of aluminum alloy grille with mixed particle size abrasive medium.The changes of surface morphology, material removal and surface roughness in the process of material removal were studied by analyzing the microscopic morphology and the results of surface profile measurement in various stages of abrasive flow machining process in order to study the change of surface morphology, material removal and surface roughness in the process of material removal.The experimental results show that the abrasive flow machining method can effectively eliminate the metal pellet aggregation on the surface of the parts caused by the "spheroidizing effect", and can effectively polishing the outer surface and the inner hole of the grille parts.The surface roughness of the grid is reduced from 14 渭 m to 1.8 渭 m.
【作者单位】： 大连理工大学精密与特种加工教育部重点实验室;
【基金】：国家自然科学基金创新群体“精密制造理论与技术基础研究”(51621064);国家自然科学基金面上项目(51475074) 中央高校基本科研业务费专项资金(DUT15QY37) 装备预研教育部联合基金(6141A02022106)~~
【分类号】：TG580.692;V261
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本文编号：1706262