Erarbeitung und Qualifizierung einer Wärmebehandlungsstrategie zur Stoffflusssteuerung in der Blechmassivumformung

Description

Mobility has always been a fundamental human desire and a driver of prosperity and progress. Due to current developments, this is increasingly becoming the focus of social change. As a result, there is a contradictory requirement for components in the drivetrain to be lighter and at the same time more durable, bringing established manufacturing techniques to their limits. The new process class of Sheet-Bulk Metal Forming can extend the process limits by combining the advantages of both processes. The material flow control was identified as a major challenge in an associated orbital forming process. The use of aluminum alloys and their strength-related characteristics in particular requires suitable measures for a material flow control, such as local short-term heat treatment. However, a holistic investigation of the cause-effect relationships in the three-dimensional stress and strain state of Sheet-Bulk Metal Forming is still missing. Therefore, the aim of this work is to develop and qualify a heat-treatment strategy for controlling the material flow in Sheet-Bulk Metal Forming processes by means of a local gradation of the mechanical properties of precipitation-hardenable aluminum alloys. On the basis of a stress and material flow-based process model and a holistic characterization of the mechanical properties, the material flow control is evaluated and transferred to an industrial relevant demonstrator geometry.