Determination of process limits for the reconditioning of worn-out gear wheels by precision postforming at elevated temperatures

在计划的项目中，应确定在高温下通过精密后成型在封闭模具中修复磨损齿轮的工艺限制。在创新工艺链上制造齿轮可以减少钢铁生产污染。磨损的齿轮应在其成熟后通过精密后成形和随后的硬精加工用于另一个生命周期。从钢材回收到齿轮回收的转变，可以替代消耗能源和资源的钢材生产以及原始锻造的各个工艺步骤。本研究项目的目的是确定磨损齿轮精密后成形的变形极限。对于这一点，在部署中发生故障的齿轮，如磨损，点蚀和齿断裂的原因将产生。随后，在高温下的精密后成形，在封闭的模具中进行的变形工艺参数的考虑。此外，磨损齿轮后成形前的材料流动和成形极限的非均匀加热的影响进行了检查。本课题是在面向工艺的基础研究的基础上，对废旧齿轮在闭式成形技术中能否回收再利用进行分析。

Within the planned project, the process limits for reconditioning of worn-out gears in a closed die by precision postforming at elevated temperatures shall be determined.A contribution to the reduction caused by the steel production pollution can be achieved in the manufacture of gears on an innovative process chain. Worn-out gears should be used after their maturity by precision postforming and a subsequent hard finishing for another life cycle. The change from steel recycling toward the gear recycling allows the substitution of energy- and resource-consuming production of steel and also the individual process steps of the raw forging.The aim of this research project is to determine deformation limits for precision postforming of worn-out gears. For this to occur in the deployment causes of failure of gears, such as wear, pitting and tooth fracture will be produced. Subsequently, the precision postforming at elevated temperatures in the closed die have to be carried out under consideration deformation process parameters. Furthermore, the influence of a non-homogeneous heating of the worn-out gears before the postforming on the flow of material and the forming limits are examined. This research project is to be analysed on the basis of process-oriented basic research, whether worn-out gears can be recycled in the closed die forming technology.