研究目的
回顾金属激光粉末床熔融(LPBF)技术的新工业进展,并探讨LPBF打印机的最新创新与未来发展方向。
研究成果
当前研究表明,激光粉末床熔融(LPBF)打印机的最新创新和未来发展方向主要集中于提升零件质量和加工速度。超短脉冲激光具有约30微米的低聚焦直径及小直径范围内的高聚焦强度,可产生101?瓦/平方米的表面能量密度,从而实现贵金属的高分辨率加工并提高尺寸精度。为提升加工速度,新一代LPBF设备的主要创新包括:闭环控制粉末处理、自动粉末筛分、可更换原料仓、双轴铺粉、多层同步打印以及多粉末料斗技术??焖偌す饣鼓芩醵檀涫奔洌馐切滦蚅PBF金属打印机的另一项改进。
研究不足
该论文未明确提及局限性,而是聚焦于LPBF技术的进展与未来方向。
该论文是一篇技术综述,探讨了来自11家不同制造商的最新激光粉末床熔融(LPBF)设备及其规格参数。文中将这些设备分为研发型(小型机)、中型机(适用于研究与小规模生产)以及重型工业机型。基于2019年在德国法兰克福举办的FormNext展会上的最新展示,本综述对金属LPBF技术的近期改进与技术要点进行了介绍和比较,涵盖激光功率、扫描速度、层厚、搭接间距、构建尺寸、粉末处理系统及设备尺寸等不同技术参数的对比分析。
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