Method and apparatus for backing the inside teeth of a...

B - Operations – Transporting – 21 – H

Patent

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B21H 5/02 (2006.01) B21K 1/30 (2006.01)

Patent

CA 2746785

A method for backing the inside teeth (2) of a sliding sleeve (3) produced by way of powder metallurgy for a manual transmission is described where the backings (1) of the teeth (4) forming the front-side pitches (9) are formed with the aid of a rolling tool (5) by back rolling accompanied by plastic deformation of material from the backing region. In order to prevent burr formation, it is proposed that the front-side tooth sections (8) delimited by the backings (1) are simultaneously calibrated whilst forming and/or calibrating the relevant pitches (9) with the aid of the rolling tool (5) for forming the backings (1).

L'invention concerne un procédé pour le renforcement de la denture intérieure (2) d'un manchon coulissant (3), fabriqué par métallurgie des poudres, pour une boîte de vitesses mécanique, les dépouilles (1) des dents (4) formant des faces inclinées (9) côté frontal, étant profilées, au moyen d'un outil de roulage (5), par galetage, avec refoulement de matériau plastique à partir de la zone de dépouille. En vue d'empêcher la formation de bavures, l'invention est caractérisée en ce qu'à l'aide de l'outil de roulage (5) pour le formage des dépouilles (1), les sections de denture (8) côté frontal, limitées par les dépouilles (1) sont en même temps calibrées avec profilage et/ou calibrage des faces inclinées correspondantes (9). L'invention concerne en outre un dispositif pour la mise en oeuvre de ce procédé.

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