[Oral Presentation]面向SLM成形的金刚石复合材料的铺粉动力学研究

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

面向SLM成形的金刚石复合材料的铺粉动力学研究

ID：277 Submission ID：14 View Protection：ATTENDEE Updated Time：2024-04-30 10:49:20 Hits：606 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

选区激光熔化(Selective Laser Melting，SLM)技术在金刚石工具领域的应用，为结构功能一体化的金属基金刚石复合材料的集成制造提供了一种新的方法。然而，粉床中金刚石颗粒分布不均匀、堆积密度松散容易导致金刚石工具性能变差。本文建立了金刚石/CuSn复合粉体的离散元模型，用于模拟刮刀铺粉过程。研究了金刚石粉体物性参数和铺粉工艺参数对粉床质量和颗粒动力学的影响。结果表明，粗金刚石颗粒表现出小的速度和强的力链，而细CuSn颗粒接触力链较弱速度较大。说明形状不规则的金刚石颗粒由于摩擦力和机械锁紧力较大，扩散能力和铺展性较差，造成了金刚石颗粒偏析。因此，通过减小金刚石颗粒的体积分数和粒度，可以提高粉床的堆积密度和均匀性。此外，通过增加铺粉层厚和降低刮刀平移速度会减弱金刚石颗粒的剪切膨胀和堵塞，从而改善粉床质量。研究结果对SLM成形金属基金刚石复合材料铺粉工艺的优化具有一定的指导意义。

Keywords

激光选区熔化；金刚石复合粉体；铺粉工艺；离散元模拟

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