Effect of blade geometry on the powder spreading process in additive manufacturing  

作　　者：Deze Yang Xihua Chu Qipeng Liu 

机构地区：[1]School of Civil Engineering,Wuhan University,Wuhan,430072,China [2]Jiangxi Key Laboratory of Forming and Joining Technology for Aerospace Components,Nanchang Hangkong University,Nanchang,330063,China

出　　处：《Particuology》2024年第11期345-355,共11页颗粒学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(grant numbers 12172263,11772237).

摘　　要：In powder-bed-based additive manufacturing,the quality of the powder bed is closely related to the geometry of the blade used during the powder spreading process.In this study,the spreading process with the vertical blade,inclined blade,and round blade with different radii was performed by discrete element method to investigate the effects of blade geometry on powder spreading.The results show that at the same spreading parameters,the round blade caused the highest density than inclined blade and vertical blade.Increasing the round blade radius can improve the packing density of the powder bed,but it has little effect on the uniformity.The increase in packing density is related to the transitional smoothness of the blade surface at the entrance of the powder bed.The smoother the shape transition of the blade surface at the powder bed entrance,the powders enter the powder bed more gently,so more powders enter the powder bed,resulting in higher packing density.The results may provide suggestions for improving the laser melting process.

关 键 词：Additive manufacturing Powder spreading Blade geometry Discrete element method 

分 类 号：TB30[一般工业技术—材料科学与工程]