选择性激光熔化
可制造性设计
机械加工
机械工程
表面光洁度
过程(计算)
铣刀
工程制图
表面粗糙度
共形映射
材料科学
计算机科学
工程类
几何学
复合材料
数学
微观结构
操作系统
作者
David Sommer,Babette Götzendorfer,Cemal Esen,Ralf Hellmann
出处
期刊:Materials
[Multidisciplinary Digital Publishing Institute]
日期:2021-10-02
卷期号:14 (19): 5753-5753
被引量:26
摘要
We report on a comprehensive study to evaluate fundamental properties of a hybrid manufacturing approach, combining selective laser melting and high speed milling, and to characterize typical geometrical features and conclude on a catalogue of design rules. As for any additive manufacturing approach, the understanding of the machine properties and the process behaviour as well as such a selection guide is of upmost importance to foster the implementation of new machining concepts and support design engineers. Geometrical accuracy between digitally designed and physically realized parts made of maraging steel and dimensional limits are analyzed by stripe line projection. In particular, we identify design rules for numerous basic geometric elements like walls, cylinders, angles, inclinations, overhangs, notches, inner and outer radii of spheres, chamfers in build direction, and holes of different shape, respectively, as being manufactured by the hybrid approach and compare them to sole selective laser melting. While the cutting tool defines the manufacturability of, e.g., edges and corners, the milling itself improves the surface roughness to Ra < 2μm. Thus, the given advantages of this hybrid process, e.g., space-resolved and custom-designed roughness and the superior geometrical accuracy are evaluated. Finally, we exemplify the potential of this particular promising hybrid approach by demonstrating an injection mold with a conformal cooling for a charge socket for an electro mobile.
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