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在材料挤出-热解结-结过程中优化金属零件的扭曲:实验和数值研究
Xueying Wei1, Xujun Li2, Rüdiger Bähr1
1Institute of Manufacturing Technology and Quality Management, Otto-von-Guericke-University Magdeburg, Magdeburg, 39106, Germany.
Heliyon
|April 10, 2024
概括
优化金属增材制造 (AM) 部件的热解结-结至关重要. 这项研究使用了实验和CFD模拟来减少青铜/PLA零件的扭曲和孔隙,发现中等器在没有延长时间的情况下有效.
科学领域:
- 材料科学 材料科学 材料科学
- 增材制造 增材制造 增材制造
- 工艺工程是过程工程.
背景情况:
- 热解-合对于通过材料挤出基础增材制造 (AM) 制造的金属注塑成型 (MIM) 零件至关重要.
- 金属零件在解过程中经常遭受扭曲和多孔性,降低机械性能.
- 缓慢解减少了缺陷,但增加了处理时间.
研究的目的:
- 优化青铜/聚酸 (PLA) 部件的热解结-结工艺,以最大限度地减少扭曲和多孔性.
- 为了研究尺寸,加热速率和保持时间对零件质量的影响.
- 运用计算流体动力学 (CFD) 来理解解绑过程中的温度分布.
主要方法:
- 在小型,中型和大型中使用青铜/PLA丝进行了脱-烧结实验.
- 在热解过程中,不同的加热速率和保持时间.
- 利用CFD模拟来分析炉内不同尺寸的温度概况.
主要成果:
- 小显示出较高的初始孔隙性 (23%),可减少到12%,加热/持久时间延长.
- 中型达到约15%的孔隙度,没有进行扩大加工.
- 大型面临着达到目标温度的挑战,限制了孔径的减少.
结论:
- 将实验研究与CFD模拟相结合,提供了一种有前途的方法来提高热解结-结中的金属零件质量.
- 的选择和过程参数的优化对于减轻AM金属部件的缺陷至关重要.
- 中型是减少青铜/PLA零件的孔隙性的有效选择,而不会显著增加循环时间.
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