Design model for the knowledge-based adjustment of the edge zone and surface properties of additive-manufactured components for guided centrifugal finishing

用于基于知识调整增材制造部件边缘区域和表面特性的设计模型，用于引导离心精加工

• 批准号: 429960079
• 负责人: Professor Dr.-Ing. Thomas Bergs
• 金额: --
• 依托单位: Werkzeugmaschinenlabor - WZL
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/429960079?language=en
• 关键词: Design; model; knowledge; based; adjustment

The challenge facing civil aviation is to cope with increasing passenger volumes while simultaneously reducing pollutant emissions. Therefore, there is a high demand for innovative manufacturing technologies that make it possible to increase engine efficiency. Additive manufacturing makes it possible to achieve weight savings by optimizing the topology of components with complex geometries such as turbine blades. The additive production of turbine blades can thus save fuel and increase engine efficiency. Due to the high surface roughness and thermally influenced edge zone properties resulting from additive manufacturing, post-processing of the edge zone is often necessary. Guided centrifugal finishing offers the potential to evenly machine the surface of components with a complex geometry. The cause-effect relationships between the process input variables and the resulting edge zone and surface properties in guided centrifugal finishing have not yet been systematically investigated. A knowledge-based process design is therefore not yet possible.The goal of the research project is therefore a heuristic explanatory model which explains the influence of the edge zone and surface properties of additively manufactured components during guided centrifugal finishing as a function of the local contact conditions. The cause-effect relationships between the process input variables and the local contact conditions are identified. On the basis of the findings, a numerical model will be developed which represents the contact between the abrasive media and the workpiece. The numerical model enables the prediction of the resulting edge zone properties as a function of the local contact conditions. Subsequently, the cause-effect relationships between the local contact conditions and the edge zone and surface properties of additively manufactured components made of Inconel 718 are identified after guided centrifugal finishing. The results are combined in an explanatory model which explains the cause-effect relationships between the process input variables and the edge zone and surface properties for the guided centrifugal finishing.

民航面临的挑战是在应对不断增长的客运量的同时减少污染物排放。因此，对能够提高发动机效率的创新制造技术的需求很高。附加制造通过优化具有复杂几何形状的部件(如涡轮叶片)的拓扑结构，使其有可能实现重量减轻。因此，涡轮叶片的添加生产可以节省燃料，提高发动机效率。由于附加制造产生的高表面粗糙度和受热影响的边缘区域特性，边缘区域的后处理通常是必要的。导向离心式抛光提供了均匀加工具有复杂几何形状的部件表面的可能性。在导向离心式抛光中，工艺输入变量与所产生的边缘区域和表面特性之间的因果关系尚未被系统地研究。因此，基于知识的工艺设计是不可能的。因此，研究项目的目标是一个启发式的解释模型，该模型解释在导向离心精加工过程中作为局部接触条件的函数的添加制造部件的边缘区域和表面特性的影响。确定了过程输入变量与局部接触条件之间的因果关系。在此基础上，建立了磨料介质与工件接触的数值模型。该数值模型能够预测作为局部接触条件的函数的结果边缘区域特性。随后，确定了导引离心光整加工后的Inconel 718添加制造部件的局部接触条件与边缘区域和表面特性之间的因果关系。结果被结合在一个解释模型中，该模型解释了工艺输入变量与导向离心式抛光的边缘区域和表面特性之间的因果关系。