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

【摘要】：增材制造(AM)技術(shù)對(duì)成型復(fù)雜結(jié)構(gòu)零件有顯著優(yōu)勢(shì),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(yīng)"所導(dǎo)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(duì)增材制造鋁合金格柵外表面及細(xì)小內(nèi)孔進(jìn)行一體化拋光試驗(yàn)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(cè)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(yàn)結(jié)果表明,磨粒流加工方法能夠有效消除"球化效應(yīng)"導(dǎo)致的零件表面的金屬球團(tuán)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(shí)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(xué)精密與特種加工教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金創(chuàng)新群體“精密制造理論與技術(shù)基礎(chǔ)研究”(51621064);國(guó)家自然科學(xué)基金面上項(xiàng)目(51475074) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金(DUT15QY37) 裝備預(yù)研教育部聯(lián)合基金(6141A02022106)~~
【分類號(hào)】：TG580.692;V261
，

本文編號(hào)：1706262