Application de la théorie des lobes de stabilité au fraisage de parois minces

作者: Gilles Dessein , Lionel Arnaud

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摘要: L'optimisation des conditions de coupe en fraisage UTGV necessite l'utilisation d'une approche vibratoire pour eviter une deterioration rapide l'outil et la broche, ainsi qu'une perte qualite d'etat surface. Nous proposons transposition methode lobes stabilite au cas du parois minces, proche contexte fabrication aeronautique. A l'issue modelisation comportement dynamique pale efforts profil, nous decrivons les zones d'instabilite d'usinage. Une validation experimentale permet mettre evidence preciser transition – instabilite puis correler avec nos resultats theoriques. Le profil experimental est ensuite compare un issu numerique incorporant le talonnage. La comparaison essais d'usinage ou talonnage controle quantifier son role. L'objectif ces travaux oriente vers definition methodologie determination optimale configuration industrielle.

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