METHOD FOR PRODUCING HOLLOW FORGED PARTS AND PARTS THUS OBTAINED

The invention relates to a method for producing hollow forged parts, that comprises the following steps: making a core of a lost material having a shape corresponding to the internal shape of the part to be obtained except for deformation during forging, positioning the core in a foundry mould, cast...

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Bibliographic Details
Main Authors PUGNET, MIKAEL, MULLER, HERVE, DEGUY, FRANCOIS
Format Patent
LanguageEnglish
French
Published 23.04.2009
Subjects
CASTING
FORGE FURNACES
FORGING
FOUNDRY MOULDING
HAMMERING
MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
POWDER METALLURGY
PRESSING METAL
PUNCHING METAL
RIVETING
TRANSPORTING
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Summary:The invention relates to a method for producing hollow forged parts, that comprises the following steps: making a core of a lost material having a shape corresponding to the internal shape of the part to be obtained except for deformation during forging, positioning the core in a foundry mould, casting a metal around the core so as to completely surround the core in order to obtain a preform (18), sealing the preform (18) so that the core is completely isolated relative to the outside, forging the preform (18) in order to obtain the part having the desired shape, and decore the core of the part in order to obtain the hollow forged part. L'invention concerne un procédé de fabrication de pièces forgées creuses, qui comporte les étapes suivantes : réalisation d'un noyau en matériau perdu dont la forme correspond à la forme intérieure de la pièce à obtenir, à la déformation près subie lors du forgeage, positionnement du noyau dans un moule de fonderie, moulage d'un métal autour du noyau pour envelopper complètement le noyau en vue d'obtenir une ébauche (18), étancher l'ébauche (18) de sorte que le noyau se trouve complètement isolé vis-à-vis de l'extérieur, forgeage de l'ébauche (18) afin d'obtenir la pièce à la forme souhaitée, et débourrage du noyau de la pièce pour obtenir la pièce forgée creuse.
Bibliography:Application Number: WO2008FR51720