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.

民航面临的挑战是应对增加乘客量，同时减少污染物的排放。因此，对创新制造技术的需求很高，这使提高发动机效率成为可能。增材制造可以通过优化具有复杂几何形状（例如涡轮叶片）组件的拓扑来实现体重节省。涡轮叶片的添加剂产生可以节省燃料并提高发动机效率。由于表面粗糙度高和由增材制造产生的热影响边缘区域，因此通常需要对边缘区域进行后处理。指导离心饰面具有复杂的几何形状的均匀机构表面的潜力。过程输入变量与所得边缘区域和表面性能之间的原因效应关系尚未系统地研究。因此，基于知识的过程设计是不可能的。因此，研究项目的目的是一种启发式解释模型，它解释了在指导离心饰面期间加上添加性制造组件的影响的影响，这是当地接触条件的函数。确定了过程输入变量与局部接触条件之间的原因效应关系。根据调查结果，将开发一个数值模型，代表磨料介质与工件之间的接触。数值模型可以预测所得的边缘区域属性作为局部接触条件的函数。随后，在引导离心术后，确定了局部接触条件与边缘区域和表面特性之间的原因效应关系。结果结合在解释模型中，该模型解释了过程输入变量与指导离心饰面的边缘区域和表面特性之间的原因效应关系。