Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
A TWO-STEP APPROACH TO MILLING THIN WALLS ENCOMPASSING CONSTANT CUTTING FORCE AND PASSIVE DAMPING
Submission Author:
Rafael Mundim , SP
Co-Authors:
Rafael Mundim, Anderson Vicente Borille
Presenter: Rafael Mundim
doi://10.26678/ABCM.COBEM2017.COB17-0848
Abstract
Milling of thin walls is a challenge that is usually overcome by means of restricting product geometry in a way that allows for parts to be machined with strategies that are similar to those used for conventional rigid parts. This results in heavier parts and therefore less efficient structures, which puts forward an opportunity for improvement in finding new methods to produce lighter and more flexible components. Usual strategies suggested in literature are based on alternating the sides of the wall being machined in a way that the structure is kept as rigid as possible during the process. This work proposes a strategy for machining thin walls that takes advantage of the possibility of producing constant cutting forces in milling by means of specific cutting depths and helical cutters. In order to compensate for the low damping of these walls, a passive damping method is also proposed which, when combined to the constant cutting force approach, allows for machining time to be reduced when compared to usual strategies. The procedure is described and two different test conditions are conducted to investigate the actual performance of the proposed strategy. Results indicate that the strategy is feasible and is able to produce parts with acceptable roughness and dimensional deviations, when applications in aircraft components are considered.
Keywords
milling, aluminum, thin wall, constant cutting force, strategy
