[Oral Presentation]金属粉末熔融过程中表面粗糙度对铺粉性能的影响研究

Organized By

Hohai University

Monash University

Co-organized by

Southeast University

Jiangxi University of Science and Technology

Northeast University

DUT-BSU Scientific Research and Innovation Center

Suzhou University of Science and Technology

State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment

Sponsoring agency

KELI SDEM Software (Dalian) Co., Ltd.

Sugon Smart Computing Information Technology Co., Ltd.

Beijing Paratera Technology Co., Ltd.

Simpop Information Technology Co., Ltd.

Important Dates

Conference Announcement

December 2023, release First Round Announcement
Abstract Submission Deadline
March 31^th, 2024
Paper Submission Deadline
April 30^th, 2024
Registration
From January 1^st, 2024
Conference Schedule
May 31^st (Friday), 2024 On-Site Registration
June 1^st to 3^rd, 2024 Conference

金属粉末熔融过程中表面粗糙度对铺粉性能的影响研究

ID：174 Submission ID：264 View Protection：ATTENDEE Updated Time：2024-04-30 09:41:07 Hits：594 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

Session：[No Session] » [No Session Block]

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Abstract

激光粉末床熔融技术是基于离散堆积原理，选用激光按三维CAD模型逐层扫描金属粉末，将粉末逐层熔化并固化，最终获得模型所设计的金属零件。在3D打印中，铺粉过程极其重要，粉末床的致密度和表面粗糙度能显著影响打印部件的质量和精度。影响粉末床质量的因素有铺粉工具的几何形状、操作参数以及基底表面粗糙度。在实际打印过程中可能出现的飞溅或参数设置不当等问题会导致基底表面粗糙，形成孔隙、裂纹或翘曲等缺陷。本文根据激光扫描方向与铺粉方向的夹角构造了几种不同角度的粗糙表面基底，采用离散单元法定量分析了粗糙基底表面与颗粒之间的相互作用，并从微观层面上分析不同粗糙度下颗粒的动力学行为。结果表明，粗糙度大的基底表面上的粉堆产生强力链数量多于粗糙度较小和光滑的基底；随着基底表面粗糙度的增加，粉末覆盖性变差，堆积密度减小；粉末覆盖面积和粉床的堆积密度随着铺粉速度的增大而减小。

Keywords

颗粒材料，离散单元法，激光粉末床熔融技术，铺粉

Speaker

吴亚萍

江西理工大学南昌校区

Submission Author

吴亚萍江西理工大学南昌校区

周宗彦江西理工大学

Sponsored By

Hohai University

Panel of Computational Mechanics on Granular Materials, Working Party of Computational Mechanics, Chinese Society of Theoretical and Applied Mechanics

Jiangsu Society of Theoretical and Applied Mechanics