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Influence de la position de l'outil sur le comportement dynamique en fraisage de parois minces

Published online by Cambridge University Press:  28 September 2005

Vincent Thevenot
Affiliation:
Turbomeca, ENIT 47, avenue d'Azereix, BP 1629, 65000 Tarbes Cedex, France
Lionel Arnaud
Affiliation:
Laboratoire Génie de Production, École Nationale d'Ingénieurs de Tarbes, ENIT, 47 avenue d'Azereix, BP 1629, 65000 Tarbes Cedex, France
Gilles Dessein
Affiliation:
Laboratoire Génie de Production, École Nationale d'Ingénieurs de Tarbes, ENIT, 47 avenue d'Azereix, BP 1629, 65000 Tarbes Cedex, France
Gilles Cazenave-Larroche
Affiliation:
Turbomeca, avenue Szydlowski, 64511 Bordes Cedex, France
Corresponding
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Abstract

Les problèmes vibratoires rencontrés lors de l'usinage en contournage de parois minces affectent la qualité de la pièce finie et dans une moindre mesure, la durée de vie de l'outil et de la broche. C'est pourquoi il est nécessaire de pouvoir limiter ces problèmes par un choix approprié des conditions de coupe. La théorie des lobes de stabilité permet de choisir les conditions de coupe adéquates en fonction du comportement dynamique de la pièce ou de l'outil. Nous introduisons ici les variations de comportement dynamique dues à la position de l'outil, dans le but d'obtenir des conditions de coupe optimales tout le long de l'usinage. Cette généralisation du tracé classique des lobes de stabilité nous conduit à représenter les lobes en trois dimensions. Ces résultats théoriques sont comparés à des usinages expérimentaux de pièces minces, en avalant.

Type
Research Article
Copyright
© AFM, EDP Sciences, 2005

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References

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