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，其工业相关性日益增强。这主要归功于几何设计自由度和部件良好机械性能的结合。通过这种技术，还可以在组件中设置限定的孔隙率，从而使材料功能化。虽然残留粉末在加工过程中充当支撑结构，但在制造过程结束后必须手动去除，成本高昂。使用液态二氧化碳 (HDCO2) 进行高压喷射可以对各种材料进行干燥且无残留的加工。在 IWF，通过专门开发的测试装置，可以产生压力高达 3000 bar 的液态二氧化碳射流。液态二氧化碳射流在完全转变为气相之前可暂时用于工件和表面的加工。最近关于射流冲击力、射流速度和凹口几何形状的结果表明，该工艺适合清洁并具有工业应用的潜力。在本项目中，基于对SLM工艺参数对内部结构部件上粉末粘附形成的影响的研究，研究了HDCO2工艺在增材制造的内部结构部件后处理中的适用性。