本文選題：增材制造(AM)　切入點：球化效應　出處：《航空學報》2017年10期

【摘要】：增材制造(AM)技術(shù)對成型復雜結(jié)構(gòu)零件有顯著優(yōu)勢,但以選區(qū)激光熔融技術(shù)為代表的金屬增材制造技術(shù)固有的"粉末粘附"、"球化效應"所導致的毛糙表面,使零件難以滿足使用要求。采用混合粒徑磨料介質(zhì)對增材制造鋁合金格柵外表面及細小內(nèi)孔進行一體化拋光試驗研究。通過分析磨粒流加工過程各階段的微觀形貌和表面輪廓測量結(jié)果等來研究材料去除過程中零件表面形貌、材料去除和表面粗糙度變化。試驗結(jié)果表明,磨粒流加工方法能夠有效消除"球化效應"導致的零件表面的金屬球團簇聚集現(xiàn)象,并能夠?qū)υ霾闹圃旄駯帕慵獗砻婧蛢?nèi)孔實現(xiàn)有效的拋光,格柵表面粗糙度從初始的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.
【作者單位】： 大連理工大學精密與特種加工教育部重點實驗室;
【基金】：國家自然科學基金創(chuàng)新群體“精密制造理論與技術(shù)基礎研究”(51621064);國家自然科學基金面上項目(51475074) 中央高�；究蒲袠I(yè)務費專項資金(DUT15QY37) 裝備預研教育部聯(lián)合基金(6141A02022106)~~
【分類號】：TG580.692;V261
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本文編號：1706262