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

民航面临的挑战是在应对不断增加的客运量的同时减少污染物的排放。因此，对能够提高发动机效率的创新制造技术的需求很高。增材制造可以通过优化具有复杂几何形状的部件（如涡轮叶片）的拓扑结构来实现减重。因此，涡轮叶片的添加剂生产可以节省燃料并提高发动机效率。由于增材制造产生的高表面粗糙度和受热影响的边缘区特性，通常需要对边缘区进行后处理。导向离心精加工提供了潜在的均匀加工具有复杂几何形状的部件表面。在导向离心精加工中，工艺输入变量与产生的边缘区和表面特性之间的因果关系尚未得到系统的研究。因此，基于知识的流程设计还不可能实现。因此，研究项目的目标是建立一个启发式解释模型，该模型解释了在导向离心精加工过程中，增材制造部件的边缘区域和表面特性对局部接触条件的影响。确定了工艺输入变量与局部接触条件之间的因果关系。在研究结果的基础上，将建立一个代表磨料介质和工件之间接触的数值模型。数值模型能够预测作为局部接触条件函数的边缘区特性。在此基础上，确定了导流离心精加工后增材制造的因科耐尔718零件的局部接触条件与边缘区域和表面性能之间的因果关系。结果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精加工的边缘区域和表面特性之间的因果关系。

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.