[T7] AM Sinter Based Technologies

[16A-T7-13] Digital Twin of the Binder Jetting Manufacturing Route from Powder to Component

*Y. Deng¹, A. Kaletsch¹, C. Broeckmann¹ (1.RWTH Aachen University, Germany)

キーワード：Binder Jetting, Simulation, Digital twin

Binder jetting is ideally suited to produce individual components, as it offers the possibility to directly achieve highly complex geometries. To ensure the direct production of net-shape components without major machining post-processing requirements, numerical models across scales were developed in this study, to model and simulate each manufacturing step of the entire process chain. Using discrete element and finite element methods, the powder spreading process and the subsequent sintering process were simulated. By considering the influences of the density distribution in green bodies, gravity, and friction between the sintering substrate and the parts to be sintered, the sintering shrinkage and the final geometry could be predicted precisely. The results from simulation were validated with experimental data from both manufacturing steps. With the help of inverse optimization, the geometry of the green parts was optimized iteratively, which allows the net-shape components with the desired geometries being manufactured despite sintering distortion.