The effect of non-uniform insert pitch on noise generation during face milling operations
Mots-clés :
noise abatement, insert pitch, noise generation, face milling, cutters, noise reduction, engine mounting, transmission housing, AlRésumé
Très souvent, lors de l'usinage en plan de certaines pièces d'aluminium de faible épaisseur, un niveau de bruit excessif est constaté. Théoriquement, ce bruit peut être atténué par 1'utilization de fraises dont les couteaux sont répartis de manière non-uniforme sur la périphérie. La présente étude rend compte des résultats obtenus lors d'une série d'expérimentations menées afin de déterminer la capacité réductrice de bruit de quatre différentes fraises à répartition non-uniforme. Ces fraises ont été testées lors de l'usinage de la surface d'assemblage avec le moteur du carter d'une transmission. Ces expérimentations ont permis de constater que 1'utilization de fraises à répartition non-uniforme ne réduit pas forcément le bruit généré. Toutefois, on remarque que le caractère "gênant" due bruit est souvent atténué sensiblement. Ajoutons que l'étude a aussi porté sur les difficultés rencontrées lors de l'application des principes de conception de ces outils "silencieux" à l'usinage de pièces de géométrie complexe.
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