Manufacture of defined residual stresses in friction assisted spinning and flow-forming

在摩擦辅助旋压和滚压成型中制造确定的残余应力

• 批准号: 410908773
• 负责人: Professor Dr.-Ing. Werner Homberg
• 金额: --
• 依托单位: Lehrstuhl für Umformende und Spanende Fertigungstechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/410908773?language=en
• 关键词: Manufacture; defined; residual; stresses; friction

The aim of the project is to expand the friction spinning process based on fundamental investigations concerning the manufacture of high-performance components for aviation and aerospace engineering with defined residual stress states. The locally adapted residual stress distributions generated in this way are to bring about an improvement in the quality and functionality of the parts, such as by allowing failure to be delayed or triggered in a defined manner, for example. The overall objective is therefore the adjustment of defined residual stress distributions over the entire and load-relevant area of the components to improve its quality and functionality. The research hypothesis being pursued is that residual stress distributions can be adjusted accurately, reproducibly and efficiently over the entire area of the components formed by friction-spinning of tubes, in particular by applying a model-based process control and that the constructive adaptation of the friction-spinning tool system and the associated expansion of the process parameter range and the spectrum of process strategies will create further possibilities for residual stress adjustments. The model-based process control adapted to the newly emerging process parameters is also intended to use the efficient and near-process 3D-DIC hole-drilling method. Furthermore, theoretical and numerical modelling of the residual stress generation in the friction spinning process is intended to replace the empirical modelling and will enable an even more efficient online control of the process. Finally, the manufactured components are to prove an improvement of the fatigue strength or the targeted failure under defined loading situations.

该项目的目的是扩大摩擦旋压工艺的基础上，有关制造高性能部件的航空和航天工程与定义的残余应力状态的基础研究。以这种方式产生的局部适应的残余应力分布将带来部件的质量和功能的改善，例如通过允许以限定的方式延迟或触发故障。因此，总体目标是调整部件的整个和负载相关区域上的定义的残余应力分布，以提高其质量和功能。所追求的研究假设是，可以在通过管的摩擦旋压形成的部件的整个区域上精确地、可再现地和有效地调节残余应力分布，特别是通过应用基于模型的过程控制，旋压工具系统以及工艺参数范围和工艺策略范围的相关扩展将创造更多的可能性用于残余应力调整。基于模型的过程控制适应于新出现的工艺参数，也打算使用有效的和近过程的3D-DIC钻孔方法。此外，在摩擦纺纱过程中的残余应力产生的理论和数值模拟的目的是取代经验建模，并将使一个更有效的在线控制的过程。最后，所制造的部件应证明在规定的载荷情况下疲劳强度或目标失效的改善。