基于离散元法的激光粉末床熔融增材制造铝合金的粉末运动规律

IF 2.1 4区工程技术

Advances in Mechanical Engineering Pub Date : 2024-07-24 DOI:10.1177/16878132241264944

Pan Lu, Zhang Chen-lin, Liu Tong, Wang Liang, Zhang Heng-hua

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引用次数: 0

摘要

激光粉末床熔融（LPBF）是一种基于逐层铺粉的前景广阔的金属增材制造技术，粉末床的均匀性对成形质量有很大影响。通过离散元法和粉末铺展实验，研究了粉末铺展过程中粉末之间的相互作用和运动，包括粉末堵塞、反弹、飞溅、涡流和空粉区。此外，还探讨了五种撒粉方案，并设计了三夹板叶片单向往复的新工艺，将撒粉的运动状态从 "叶片推粉 "转变为 "叶片抱粉"。通过将刀片与工作平台之间的距离从 0 微米增加到 20 微米，基材上表面与工作平台之间的距离为 50 微米，粉末飞溅和空粉等缺陷减少了。通过采用三夹板刀片结构的单向往复式新工艺，实现了铝合金粉末的均匀粉床。

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Powder movement rules of laser powder bed fusion additive manufacturing aluminum alloy based on discrete element method

Laser Powder Bed Fusion (LPBF) is a promising metal additive manufacturing technology based on layer by layer powder spreading, and powder bed uniformity has a great influence on the forming quality. By Discrete Element Method and powder spreading experiment, the interaction and movement between powder were studied during powder spreading, including powder jamming, rebound, splash, eddy, and empty powder area. Additionally, five kinds of powder spreading schemes were explored, and the new process of one-way reciprocating with tri-splint blade was designed to change the motion state of powder spreading from “blade pushing powder” to “blade holding powder.” By increasing the distance between the blade and the working platform form 0 to 20 µm with the distance between the upper surface of the substrate and the working platform 50 µm, defects such as powder splash and empty powder decreased. And the uniform powder bed of aluminum alloy powder was achieved with the new process of one-way reciprocating with tri-splint blade structure.

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来源期刊

Advances in Mechanical Engineering Engineering-Mechanical Engineering

自引率

4.80%

发文量

353

期刊介绍： Advances in Mechanical Engineering (AIME) is a JCR Ranked, peer-reviewed, open access journal which publishes a wide range of original research and review articles. The journal Editorial Board welcomes manuscripts in both fundamental and applied research areas, and encourages submissions which contribute novel and innovative insights to the field of mechanical engineering