激光选区熔化波形进风道结构设计仿真及实验研究*

doi:10.16731/j.cnki.1671-3133.2024.05.018

现代制造工程 ›› 2024, Vol. 524 ›› Issue (5): 138-144.doi: 10.16731/j.cnki.1671-3133.2024.05.018

• 设备设计/诊断维修/再制造 • 上一篇下一篇

激光选区熔化波形进风道结构设计仿真及实验研究^*

刘森林^1,2, 邢飞^1,2, 卞宏友¹, 王海^1,2

1 沈阳工业大学机械工程学院,沈阳 110870;
2 南京中科煜宸激光技术有限公司,南京 210038

收稿日期:2023-08-02 出版日期:2024-05-18 发布日期:2024-05-30
作者简介:刘森林,硕士研究生,主要研究方向为增材制造。E-mail:liusenlin0912@163.com
基金资助:
^*国家重点研发计划项目(2022YFB4602402);国家科技重大专项项目(2019-VII-0004-0144)

Design simulation and experimental research on the structure of the waveform air inlet duct in selective laser melting

LIU Senlin^1,2, XING Fei^1,2, BIAN Hongyou¹, WANG Hai^1,2

1 College of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870,China;
2 Nanjing Zhongke Yuchen Laser Technology Co., Ltd., Nanjing 210038,China

Received:2023-08-02 Online:2024-05-18 Published:2024-05-30

摘要/Abstract

摘要： 在激光选区熔化增材制造设备中,风循环系统不仅起到防氧化的作用,更重要的是在成形区形成的风场可以将成形过程中金属粒子产生的黑烟、飞溅等工艺副产物带走,而这也对成形件的质量有着重要影响。基于目前南京中科煜宸RS450型激光选区熔化成形设备存在的金属粒子飞溅、黑烟残留问题,运用SolidWorks、AnsysFluent等软件对风道与整体成形仓成形区域的流道进行仿真模拟,再结合实际需求以及模拟效果提出波形进风道新型吹风结构并进行优化。通过仿真数据表明,成形过程中产生的飞溅、黑烟残留过多是由于成形区风场分布不均匀造成的。经过仿真优化,极大地改善了风场分布不均匀的情况,并通过实验予以验证。采用优化后的波形进风道结构进行试件的致密度实验,也得到极大改善。

关键词: 激光选区熔化, 风场, 波形进风道, 优化仿真

Abstract: In laser powder bed fusion additive manufacturing systems, the airflow circulation system serves not only as an oxygen barrier but also plays a crucial role in creating an airflow field within the build area. This airflow field primarily removes process by-products such as smoke and spatter, which are generated during the forming process and significantly impact the quality of the fabricated parts. Based on the issues of excessive spatter and residual smoke in the RS450 laser selective melting and forming equipment manufactured by Nanjing Zhongke Yuchen, simulation and modeling of the flow channels in the air duct and the overall build chamber were conducted using software tools such as SolidWorks and AnsysFluent. Subsequently, a novel waveform air inlet duct structure was proposed and optimized, taking into account practical requirements and simulation results. The simulation data indicated that the uneven distribution of the airflow field in the forming area was responsible for the excessive accumulation of smoke and spatter during the forming process. Through simulation-based optimization, significant improvements were achieved in the distribution of the airflow field, which were further validated through experimental verification. The use of the optimized structure in density experiments on test specimens also resulted in substantial enhancements.

Key words: Selective Laser Melting (SLM), airflow field, waveform air inlet duct, optimization simulation

中图分类号:

:TH16

刘森林, 邢飞, 卞宏友, 王海. 激光选区熔化波形进风道结构设计仿真及实验研究^*[J]. 现代制造工程, 2024, 524(5): 138-144.

LIU Senlin, XING Fei, BIAN Hongyou, WANG Hai. Design simulation and experimental research on the structure of the waveform air inlet duct in selective laser melting[J]. Modern Manufacturing Engineering, 2024, 524(5): 138-144.

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激光选区熔化波形进风道结构设计仿真及实验研究^*

Design simulation and experimental research on the structure of the waveform air inlet duct in selective laser melting

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