DYNAMICAL ANALYSIS OF AN END MILLING PROCESS

Anna Carla Araujo (1) , Pedro Manuel Lopes Calas Pacheco (1) , Marcelo Amorim Savi (2)

1 CEFET/RJ - Centro Federal de Educação Tecnológica Celso Suckow da Fonseca [Rio de Janeiro]
2 UFRJ - Universidade Federal do Rio de Janeiro [Brasil] = Federal University of Rio de Janeiro [Brazil] = Université fédérale de Rio de Janeiro [Brésil]

The cutting processes include different manufacturing procedures as milling, turning and drilling. In all of these processes, the machine tool vibration plays an important role concerning the cutting characteristics. Therefore, its correct understanding is essential in order to improve the workpiece surface quality and avoid tool breakage. Chatter and squeal are some undesirable phenomena related to an improper functioning. This article analyses the nonlinear dynamics associated with the end milling tool and its vibration relative to the work piece considering a nonsmooth two-degree of freedom system. End milling process is of concern assuming different machining characteristics. In this work, the cutting force is considered as a composition of contact/non-contact of the tool and the workpiece with stick-slip behavior guided by friction force and the prescribed velocity of the tool holder. Numerical simulations are carried out showing some situations related to proper and improper functioning during the cutting process.

Mots clés: End milling; force prediction; nonlinear dynamics; nonsmooth systems; chatter; machining

Domaines: Mécanique [physics.med-ph]

Anna Carla Araujo, Pedro Manuel Lopes Calas Pacheco, Marcelo Amorim Savi. DYNAMICAL ANALYSIS OF AN END MILLING PROCESS. 20th International Congress of Mechanical Engineering, 2009, Gramado, Brazil. ⟨hal-03212844⟩