Contribution à la caractérisation des moyens de mise en forme : application aux presses à vis
Communication avec acte
The metal forming industry uses more and more numerical simulation, and especially the Finite Element software Forge®, with the aim to fulfill 3 main objectives: predict tooling lifetime, predict the amount of energy required to obtain the part desired and predict the thermomechanical path leading to the optimal final microstructure. Currently, numerical simulations allow good predictions regarding forging operations with currently used material, like steel. But to remain competitive forging industries cannot work only with steel, and have to innovate by developing new forging process for high performance material. But concerning the forging operations of these new high performing material, significant difference are observed between numerical and experimental results. In particular regarding the prediction of energy required to correctly forge a part. This study aims at understanding this disparity between numerical and experimental results, in the special case of screw presses. For that, the first step describes the functioning of screw presses but also the screw presses model implemented into the Forge software. Experimental results of upsetting tests in 2 different conditions have then been compared to results obtained numerically by simulating the corresponding forging tests. Significant differences are observed, and the necessity to define a stiffness coefficient for the press is highlighted. Two methods have been carried out to determine the stiffness of the press, a theoretical one and an experimental one. Concerning the experimental one, external tools of acquisition like a rapid camera and a 3D tracking points system have been used to analyze the press behavior during blows. Finally, stiffness values obtained with the two different methods are compared.
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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 ...
Communication avec acteDURAND, Camille; FREUND, Ludovic; BAUDOUIN, Cyrille; BIGOT, Régis; GUÉRIN, Jean-Dominique (University of Liege, 2021-04)Nowadays, numerical simulations are more and more used in forging industry, and their predictability is validated through a comparison with experiments. But sometimes simulations and experiments provide significantly ...