Descripción del proyecto
Tratamiento de superficies con láser para ranuras dentadas
Las ranuras dentadas empleadas en aplicaciones de índice de derivación ultraalto pueden obtener unas calidades superficiales sin parangón al combinar procesos láser y de deposición física en fase vapor. El equipo de CROSSONT, financiado con fondos europeos, desarrollará métodos de tratamiento de superficies con láser para ranuras dentadas capaces de reducir el riesgo de desgaste y limitar la fricción en las conexiones de las ranuras entre el eje y el engranaje. En el proyecto se empleará una combinación de materiales de recubrimiento y endurecimiento local con láser. Además, se estudiarán superficies de acero para engranajes texturizadas con láser, cuya producción sigue siendo un método innovador. En CROSSONT se empleará un plan de análisis estadístico para identificar los métodos más eficientes y examinar su combinación. Los métodos se evaluarán en un nuevo banco de pruebas en bucle apta para ranuras dentadas.
Objetivo
The main goal of the project CROSSONT is to provide surface treatment methods for crowned splines which are able to fulfil the requirement of reducing the risk of wear and minimizing the friction in the spline connections between shaft and gear. It is the consortium's firm conviction that outstanding surface properties for crowned splines in UHBR applications can be generated with a combination of laser and physical-vapour-deposition (PVD) processes. Modelling of the crowned spline will be conducted to predict its behaviour. In combination with the coatings, laser local hardening is to be used, and, on the other hand, laser textured gear steel surfaces are to be considered. The latter are becoming more and more important due to their tribological properties. It is mandatory that the results of the project are low in maintenance, highly reliable and allow long life time. The proposed laser based surface treatments technologies are laser local hardening, laser microstructuring and laser nanostructuring. Additionally, multi-layered coatings will be investigated in terms of PVD and in specific by reactive magnetron sputtering. These systems may be doped with silver in order to control heat balance or to introduce a wear indicator as a smart coating. The most effective methods will be identified by using a statistical test plan, which will also investigate the combination of such methods. While PVD is able to realise thin hard coatings to protect the surface from wear, the named laser processes can either reduce wear (e.g. laser hardening) and/or reduce the coefficient of friction (e.g. micro-/nanotextures). In general, laser local hardening can be considered as an almost established process, while laser texturing is still an innovative approach to further improve the surface properties of crowned splines. The most promising methods will be applied to full scale splines and evaluated in dynamic fatigue testing. The findings are summarized in a technical recommendation.
Ámbito científico
Programa(s)
Régimen de financiación
RIA - Research and Innovation actionCoordinador
52062 Aachen
Alemania