Consideration of residual stress and geometry during heat treatment to decrease shaft bending
Article dans une revue avec comité de lecture
In automotive industry, heat treatment of components is implicitly related to distortion. This phenomenon is particularly obvious in the case of gearbox parts because of their typical geometry and precise requirements. Even if distortion can be anticipated to an extent by experience, it remains complex to comprehend. Scientific literature and industrial experience show that the whole manufacturing process chain has an influence on final heat treatment distortions. This paper presents an approach to estimate the influence of some factors on the distortion, based on the idea of a distortion potential taking into account not only geometry but also the manufacturing process history. Then the idea is developed through experiments on an industrial manufacturing process to understand the impact of residual stress due to machining on shaft bending and teeth distortion during heat treatment. Instead of being measured, residual stress is being neutralized. By comparing lots between each other, connections between gear teeth geometry and manufacturing steps before heat treatment are obtained. As a consequence, geometrical nonconformities roots can be determined more easily thanks to this diagnosis tool, and corrective actions can be applied. Secondly, the influence of product geometry on bending is experimentally considered. Moreover, metallurgical observations enable to explain the influence of workpieces geometry on shaft bending. Thanks to the obtained results, process and product recommendations to decrease shafts bending are proposed.
Fichier(s) constituant cette publication
Cette publication figure dans le(s) laboratoire(s) suivant(s)
Visualiser des documents liés par titre, auteur, créateur et sujet.
Communication avec acteHeat treatment is widely used in automotive industry to improve mechanical properties of workpieces. It also generates side effects such as geometrical distortions. Scientific literature and experience show that the ...
Modélisation pour évaluer l’efficacité d’une opération de forgeage : application aux machines pilotées en énergie Article dans une revue sans comité de lectureLes travaux présentés ici visent à modéliser le comportement dynamique des machines de forgeage, afin de considérer à terme, l’influence du comportement des machines sur le procédé. Pour se faire, l’étude se limite au cas ...
Communication avec acteDURAND, Camille; MULL, Jean Francois; BAUDOUIN, Cyrille; BIGOT, Régis (Association Française de Mécanique (AFM), 2019-09)The increasing use of superalloys in the forging industry induces the development of new manufacturing processes. These new processes are set up thanks to Finite Element simulation. But regarding the prediction of the ...
Communication avec acteFinite Element analyses are established in the metal forming industry, with the aim to fulfill three objectives: predict tooling lifetime, predict the energy required to obtain the desired part and predict the thermomechanical ...
Communication avec acteMULL, Jean-François; DURAND, Camille; BAUDOUIN, Cyrille; BIGOT, Régis; BORSENBERGER, Marc; BORSENBERGER, Marc (AIP Publishing, 2019-07)The increasing use of superalloys in the industry brings new issues to forging manufacturers concerning Finite Element analysis of the forming process. Once we consider high performing materials, significant differences ...