Towards microstructure control in forging and rolling: combining AI with process models for closed-loop property control

at - Automatisierungstechnik, vol. 72, pp. 980–991

Abstract

Abstract Metal forming processes like open-die forging or hot rolling are well-established for the production of key components in various industries. Nevertheless, the control of the final microstructure and hence mechanical properties is not yet common. To achieve this, the authors propose and discuss a control concept based on reinforcement learning, fast process models (FPM) and an “operator in the loop” approach. The concept is explained and tested using deviating initial ingot temperatures as idealized process disruptions. RL algorithms are trained for both processes and transferred into the controllers that are connected to a simulative environment based on FPM. Within this framework, the online adaption is possible in ∼2 s in rolling and 4–6 s in forging. This highlights the concepts suitability to be used for property control in hot metal forming.

Authors 3

1. Niklas Reinisch corresponding Aachen Institute of Metal Forming

   RWTH Aachen University

   Affiliation as printed

   Institute of Metal Forming, RWTH Aachen University , Intzestraße 10, 52072 Aachen , Germany

2. Christian Idzik Aachen Institute of Metal Forming

   RWTH Aachen University

   Affiliation as printed

   Institute of Metal Forming, RWTH Aachen University , Intzestraße 10, 52072 Aachen , Germany

3. David Benjamin Bailly Aachen Institute of Metal Forming

   RWTH Aachen University

   Affiliation as printed

   Institute of Metal Forming, RWTH Aachen University , Intzestraße 10, 52072 Aachen , Germany