Critical thickness and dynamic stiffness for chatter avoidance in thin floors milling

Francisco Javier Campa (1) , Luis Norberto López de Lacalle (1) , Gorka Urbicain (1) , Aitzol Lamikiz (1) , Sébastien Seguy (2) , Lionel Arnaud (3)

1 ETSI - Escuela Técnica Superior de Ingenieria
2 ICA - Institut Clément Ader
3 LGP - Laboratoire Génie de Production

A common problem in the aeronautical industry is the chatter vibration due to the lack of dynamic stiffness in the milling of thin walls and thin floors. The present work proposes a method for chatter avoidance in the milling of flexible thin floors with a bull nose end mill. It allows the calculation of the thickness previous to finish milling or the minimum dynamic stiffness that the floor must have to avoid the chatter vibration appearance. To obtain these values, the stability model algorithm has been inverted to estimate the thickness or the dynamic stiffness required in a floor to allow a stable milling. This methodology has been validated satisfactorily in several experimental tests.

Mots clés: Thin parts milling; Stability lobes; Chatter

Domaines: Génie mécanique [physics.class-ph]

Francisco Javier Campa, Luis Norberto López de Lacalle, Gorka Urbicain, Aitzol Lamikiz, Sébastien Seguy, et al.. Critical thickness and dynamic stiffness for chatter avoidance in thin floors milling. Advanced Materials Research, 2011, 188, pp.116-121. ⟨10.4028/www.scientific.net/AMR.188.116⟩. ⟨hal-00783788⟩