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。 The additive manufacturing (AM) technology has significant advantages for forming complex structural parts, but the inherent “powder adhesion”, “spheroidization effect” of the metal additive manufacturing technology represented by the selective laser melting technology Rough surface, the parts difficult to meet the requirements. The mixed particle size abrasive medium is used to conduct the integrated polishing experiment on the outer surface of the aluminum alloy grid and the small inner hole of the additive manufacturing. The surface morphology, material removal and surface roughness of the parts during the material removal process were studied by analyzing the microscopic morphology and the surface profile measurement results of the various stages of the abrasive particle flow machining process. The experimental results show that the abrasive flow machining method can effectively eliminate the metal ball clusters on the part surface caused by the “spheroidizing effect” and can effectively polish the outer surface and the inner hole of the additive manufacturing grille part, The grille surface roughness is reduced from the initial 14 μm to 1.8 μm.