“Incremental Casting”: Support Material and Close-Loop Control of Layer Height for Direct Metal Printing with Aluminium

“增量铸造”：铝直接金属打印的支撑材料和层高闭环控制

• 批准号: 420547518
• 负责人: Professor Dr. Tim C. Lüth
• 金额: --
• 依托单位: Institut für Materials Resource Management
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/420547518?language=en
• 关键词: Incremental; Casting; Support; Material; Close

As part of the previous project, water-soluble salt support structures for the droplet-based additive manufacturing of metals could be produced for the first time. In addition, the implementation of a height sensor and coupling with the printing parameters created the basis for geometry deviation compensation. The support structures were initially monolithic. However, due to the low thermal conductivity and high solidification shrinkage of salts, the height of salt support structures is limited. The use of salts only as a thin release layer minimizes the influence of the thermophysical properties of the salt on the process. In this project continuation, a process for the fabrication of the release support structures will be developed, thermally simulated and characterized. The generation of different droplet sizes allows the targeted variation of the droplet size within a component. In this way, either geometric details can be better reproduced or the printing speed can be optimized. To investigate this approach, strategies for G-code generation will be developed and suitable test specimens will be characterized.

作为先前项目的一部分，可以首次生产用于基于液滴的金属增材制造的水溶性盐支撑结构。此外，高度传感器的实现及其与打印参数的耦合为几何偏差补偿奠定了基础。支撑结构最初是整体的。然而，由于盐的导热系数低、凝固收缩率高，盐支撑结构的高度受到限制。盐仅作为薄释放层使用，可将盐的热物理性质对工艺的影响降至最低。在这个项目的延续中，释放支撑结构的制造过程将被开发，热模拟和表征。不同液滴尺寸的产生允许在组件内有针对性地改变液滴尺寸。这样，要么可以更好地再现几何细节，要么可以优化打印速度。为了研究这种方法，将开发g代码生成策略，并对合适的测试样本进行表征。