Automatisierte Demontage von Schraubverbindungen für das Remanufacturing - Konzeption, Aufbau und Betrieb einer Demontagezelle

The 17 Sustainable Development Goals entail a paradigm shift in the industrial landscape towards a circular economy. Remanufacturing emerges as prominent application among the different strategies for environmental sustainability. Production technology holds a pivotal role to the successful implementation of this strategy. In the current state of the art, remanufacturing applications are often conducted manually in low-wage countries due to the challenges of automating the remanufacturing process chain. However, with an expected increase in remanufactured goods in future, driven by growing environmental awareness among consumers and legislative regulations, automation will become essential. The remanufacturing process chain includes disassembly into components, with the detaching of threaded connections being among the most frequent disassembly steps. Yet, the automation of disassembly is especially challenging
due to the wear and tear on products and connections at the end of their lifecycle. Processed parts and connections are of individual conditions when fed back to the remanufacturing process chain.
This work addresses the issue of process failures in the automated disassembly of threaded connections, which have been subject to wear and tear throughout their lifecycle. ... mehrA model-based evaluation of the connection’s state is used to predict the success of the disassembly process.
The approach to achieve this goal is based on four building blocks: (1) Process models for the automated disassembly of bolts are developed and enabled for application in automation technology by information representation techniques; (2) A disassembly cell
for the automated disassembly of supplementary motors in automobiles is systematically developed with special focus on robot tools; (3) A suitable control system is implemented, which uses the derived process models to increase the success rate of disassembly; (4) The validation of the approach is carried out through experimental test series.
Results include methods and models for the a priori evaluation of the success of disassembly of threaded connections, with the application of the approach proving to be promising. Vision-based methods for generating product and condition information are
successfully implemented. However, the detailing of the process models requires a large amount of sensor technology, and thus the models are simplified in appropriate aspects in this work.