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@article{faucris.219365499,
author = {Kleffel, Tobias and Frey, Philipp and Merklein, Marion and Drummer, Dietmar},
doi = {10.1515/polyeng-2019-0098},
faupublication = {yes},
journal = {Journal of Polymer Engineering},
peerreviewed = {Yes},
title = {{Analysis} of the formation of gap-based leakages in polymer-metal electronic systems with labyrinth seals},
year = {2019}
}
@inproceedings{faucris.234623105,
abstract = {An increasingly connected production in the sense of Industry 4.0 allows completely new possibilities in regard to improved and more efficient production and higher product quality. But a key factor to Industry 4.0 is a consistent data flow along the production chain. However, the exchange of data, especially between companies, still is a major obstacle to overcome in order to achieve the aforementioned advantages. Currently, there are increasing efforts to record and analyse data. But there is a lack of a holistic system to handle data, therefore commonly company databases or other inefficient methods are used. These solutions are limited with regard to data exchange since the ownership of data cannot be proven, production data has no unforgeable timestamp, which in turn hinders the generation of complete production history from the final product (e.g., car door) back to the semi-finished product (e.g., steel sheet). As a result, there is insufficient to no data exchange along the production chain. In order to solve these problems blockchain is a promising approach. At the Institute of Manufacturing Technology, an operational blockchain system was developed and implemented using standard production machines. With the combination of a quarto rolling mill and a 400t - press, representing the sheet metal supplier and a forming company, respectively, the typical process chain of sheet metal processing is represented, which allows the detailed investigation of the established blockchain in this field of application. Within this contribution, the conceptual approach of a blockchain system for forming technology will be presented. The nature and the classification of occurring data throughout the production chain will be addressed.},
author = {Frey, Philipp and Lechner, Michael and Bauer, T. and Shubina, Tatyana and Yassin, Antonia and Wituschek, Simon and Virkus, Maximilian and Merklein, Marion},
booktitle = {IOP Conference Series: Materials Science and Engineering},
date = {2019-06-03/2019-06-07},
doi = {10.1088/1757-899X/651/1/012046},
editor = {Ton van den Boogaard, Javad Hazrati, Nico Langerak},
faupublication = {yes},
note = {CRIS-Team Scopus Importer:2020-02-21},
peerreviewed = {unknown},
publisher = {Institute of Physics Publishing},
title = {{Blockchain} for forming technology - {Tamper}-proof exchange of production data},
venue = {Enschede},
volume = {651},
year = {2019}
}
@article{faucris.255617017,
abstract = {The ability to both track physical products and to gather a production data record are important elements of modern manufacturing processes and crucial requirements for an end-to-end digital production. This work presents a solution for both challenges based on the combination of two systems: While a blockchain-based data exchange platform ensures that the requirements towards networked processes are met, an optical technology for marker-free identification of component parts is used.},
author = {Lechner, Michael and Christ, T. and Frey, Philipp and Wituschek, Simon and Arzhanov, A. and Petrov, F. and Merklein, Marion},
doi = {10.37544/1436-4980-2020-10-60},
faupublication = {yes},
journal = {wt Werkstattstechnik - Online},
note = {CRIS-Team Scopus Importer:2021-04-19},
pages = {704-708},
peerreviewed = {Yes},
title = {{Blockchain} in sheet metal processing.},
volume = {110},
year = {2020}
}
@article{faucris.294576305,
abstract = {Modern industrial manufacturing processes have to meet ever-increasing requirements in terms of material and resource efficiency, quality and product variety. The cross-company consolidation of integrity-secured data is a prerequisite for the retrospective identification of quality problems, the documentation of compliance with standards and the allocation of resource consumption along the value chain. This paper uses the example of a material characterization process for hybrid lightweight construction processes to discuss how blockchain technology can be used to implement a tamper-proof storage concept.},
author = {Lechner, Michael and Frey, Philipp and Kreß, Maximilian and Christ, T. and Charlet, C. and Merklein, Marion},
doi = {10.37544/1436-4980-2021-11-12-88},
faupublication = {yes},
journal = {wt Werkstattstechnik - Online},
keywords = {Digitalisierung; Industrie 4.0; Werkstoffe},
note = {CRIS-Team Scopus Importer:2023-03-29},
pages = {857-862},
peerreviewed = {Yes},
title = {{Blockchain}-{Systeme} für den manipulationssicheren {Datenaustausch} in der industriellen {Fertigung}: {Distributed} {Ledgers} für den {Materialdatenaustausch}},
volume = {111},
year = {2021}
}
@article{faucris.269762945,
abstract = {The process chain for the manufacturing of sheet metal components in mass production includes various cutting and forming operations, which influence the resulting properties of the parts and therefore subsequent manufacturing steps, such as clamping and joining. It is shown that clamping of the components leads to superimposed residual stresses and geometry changes. Therefore, the part properties differ from the initial state of the semifinished products, which has to be considered in the design of clinched joints. This paper presents an approach for coupled determination of the properties of semifinished and finished parts during deep drawing and clamping as well as their effects on the joint quality during clinching. One method for the effective and efficient determination of the properties of semifinished products and components during production is using process data from the preceding manufacturing processes, which is concretely presented in this work. In addition to the interconnection of the entire production chain, it is necessary to define relevant process data for each individual manufacturing step and to correlate the data with the material properties reliably. Therefore, the cross-process interactions of different steps of the process chain for the manufacturing of sheet metal components and the effect of process variations on subsequent manufacturing steps are investigated. Consequently, the boundary conditions for a mechanical joining process based on data from preceding process steps can be predicted.
Within current production processes, weighing is almost exclusively performed as an end-of–line process to take the entire rotor assembly into account. However, concerning the production of drives with permanent magnets, particularly those with magnets integrated into the lamination stack (IPM-Drives), production steps leading to the rotor assembly already deliver prefabricated lamination modules that can be evaluated regarding their imbalance. By determining the imbalance of those modules and a varying rotational combination of a number of modules being needed to form a complete rotor assembly, balancing efforts are considered to be reduced significantly; resulting in a lighter rotor assembly due to thinner end caps on the rotor.
The presented Paper describes methods and strategies to evaluate the imbalance of single lamination stacks and their preferred orientation prior to their assembly onto the rotor shaft. Depending on the rotor topology (pole number, magnet count), restrictions regarding free rotation have to be considered. Additionally, known methods for balancing in single and double layers have to be practically analysed and compared for the balancing operation in focus.
Using pre-stacked laminations, the balancing operation is validated in practice to determine actual effects on the imbalance of a complete lamination stack. Using different combinations for aggregating single packages, the imbalance can be reduced by up to 30%.