Gas Field Simulation and Flow Channel Structure Optimization of SLM

被引：5

作者：

Liang P. ^{[1
]}

Tang Q. ^{[1
]}

Yu Z. ^{[2
]}

Feng Q. ^{[1
]}

Liu W. ^{[1
]}

机构：

[1] State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing

[2] Avic Chengdu Aircraft Industial(Group) Co., Ltd., Chengdu

来源：

Zhongguo Jixie Gongcheng/China Mechanical Engineering | 2019年 / 30卷 / 07期

关键词：

Black smoke; Computational fluid dynamics(CFD); Flow field analysis; Inert protective gas; Selective laser melting(SLM);

D O I：

10.3969/j.issn.1004-132X.2019.07.015

中图分类号：

学科分类号：

摘要：

Aiming at the black smoke residue phenomenon during SLM processes, the gas field in the cross sections of inert gas supply channels and the black smoke generation zones in the forming chambers of a SLM system called E-Plus-M250 were simulated using ANSYS ICEM CFD and ANSYS FLUENT. The structures of the inert gas supply channels were optimized based on the simulation results. The simulation results show that the residual black smoke on the powder beds of the forming chambers is caused by the uneven distribution of the gas field in the laser scanning areas. Based on the simulation results and through sever improvements to the structures of the gas supply channels, the standard deviation of the air velocity distribution at the air inlet cross sections is reduced from 0.472 7 to 0.182 1, which is in good agreement with the flow fields of the forming chambers. The experiments verify the effectiveness of the optimization scheme, which means that the optimized flow channel has the capability of removing the black smoke more effectively when the metal powder is melted in the forming chambers. © 2019, China Mechanical Engineering Magazine Office. All right reserved.

引用

页码：858 / 863

页数：5

共 9 条

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