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Systematic quantitative investigation of the unscrewing process with regard to breakaway torque

Mangold, Simon ORCID iD icon 1; Gerlitz, Eduard 1; Zimprich, Sebastian 2; Friedmann, Marco 1; Matthiesen, Sven 3; Fleischer, Jürgen 1
1 Institut für Produktionstechnik (WBK), Karlsruher Institut für Technologie (KIT)
2 Karlsruher Institut für Technologie (KIT)
3 Institut für Produktentwicklung (IPEK), Karlsruher Institut für Technologie (KIT)


Threaded connections make up the majority of separable connections used today. Their disassembly behaviour strongly depends on the conditions during the life-phase. With the trend towards circular economy, disassembly particularly for remanufacturing requires automation. For production systems this mandates a certain capability of adaptation towards different product conditions. In the regarded case of dismantling threaded connections, this is the automatic selection of appropriate robot tools. One important criterion for the tool-selection is the breakaway torque, which strongly depends on friction parameters within the threads and the head surface. Those are influenced by e.g. corrosion and head type. In this contribution, the results of a systematic experimental investigation of the breakaway torque of threaded connections is presented. The aim of the contribution is to determine the influence on the breakaway torque of typical factors appearing in automated disassembly systems. Therefore, a total of 90 experiments are conducted which include five factors: Nominal diameter; Screw head type; Corrosion; Plate material; Applied torque during assembly.

Verlagsausgabe §
DOI: 10.5445/IR/1000153466
Veröffentlicht am 05.12.2022
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Produktentwicklung (IPEK)
Institut für Produktionstechnik (WBK)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2022
Sprache Englisch
Identifikator ISSN: 2210-464X, 2210-4690
KITopen-ID: 1000153466
Erschienen in Journal of Remanufacturing
Verlag Springer
Band 13
Seiten 53-66
Vorab online veröffentlicht am 02.12.2022
Schlagwörter Remanufacturing, Disassembly, Threaded connections, Recycling
Nachgewiesen in Dimensions
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