Functionalization of parts by generating an internal structure using SLM and post-processing methods

通过使用 SLM 和后处理方法生成内部结构来实现零件的功能化

• 批准号: 426311977
• 负责人: Professor Dr.-Ing. Eckart Uhlmann
• 金额: --
• 依托单位: Fachgebiet Werkzeugmaschinen und Fertigungstechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/426311977?language=en
• 关键词: Functionalization; parts; generating; internal; structure

Selective Laser Melting (SLM) is an additive manufacturing technique with increasing industrial relevance. This is mainly due to the combination of geometric design freedom and good mechanical properties of the components. With this technique, it is also possible to set a defined porosity in the components and thus to functionalize the material. While the residual powder serves as a support structure during the process, it must be removed manually and costly after the manufacturing process. High-pressure blasting with liquid CO2 (HDCO2) enables a dry and residue-free processing of various materials. At the IWF, with a specially developed test-setup, a liquid CO2 jet with a pressure of up to 3000 bar can be generated. The liquid CO2 jet is temporarily usable for the machining of workpieces and surfaces before it passes completely into the gas phase. Recent results on jet impact forces, jet velocities and notch geometries show that the process is suitable for cleaning and offers potential for industrial application. In the present project, based on investigations on the influence of the SLM process parameters on the formation of powder adhesions on internally structured components, the applicability of the HDCO2 process for the post-processing of additively manufactured, internally structured components is investigated.

选择性激光熔化（SLM）是一种增材制造技术，其工业相关性不断增加。这主要是由于几何设计自由和组件的良好机械性能的结合。通过这种技术，还可以在组件中设置定义的孔隙率，从而使材料功能化。尽管残留粉末在此过程中充当支撑结构，但必须在制造过程后手动且昂贵。使用液体CO2（HDCO2）进行高压爆破，可以对各种材料进行干燥且无残留的加工。在IWF上，具有特殊开发的测试设置，可以产生液体二氧化碳射流，最多可产生3000杆的压力。液体二氧化碳射流暂时可用于工件和表面的加工，然后才能完全进入气相。关于喷气撞击力，喷气速度和缺口几何形状的最新结果表明，该过程适合清洁，并为工业应用提供了潜力。在本项目中，基于对SLM过程参数对粉末粘连形成对内部结构化组件的影响的研究，研究了HDCO2工艺在加上添加性制造的内部结构成分后处理的适用性。