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Hot rolling of large gears

Warmwalzen großmoduliger Stirnräder
: Landgrebe, Dirk; Sterzing, Andreas; Lahl, Mike; Druwe, Thomas; Taubert, Anne Manuela


OALib journal 4 (2017), No.2, Art. e3152, 13 pp.
ISSN: 2333-9705 (Print)
ISSN: 2333-9721 (Online)
Journal Article
Fraunhofer IWU ()
Zahnräder; Massivumformung; Warmwalzen; Verzahnungswalzen; gears; bulk metal forming; hot-rolling; gear rolling

Forming processes are generally characterized by a high degree of material utilization as well as short process times and, consequently, a decent economic efficiency. Furthermore, incremental forming enables the use of relatively low forming forces which results in a more compact design of the used machines. These conveniences are utilized in terms of roll forming with round tools to form gears and threads in a competitive way. Based on experiences gained over many years of researching rolling technologies, a cross-rolling process characterized by round tools with outer gearings was elaborated to realize a hot forming process of large gears at the Fraunhofer IWU. At actual project GEARFORM a scaled sun gear demonstrator from wind gear application could be realized by hot rolling technology. An optimized rolling time was achieved by 32.5 seconds.