Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Cutting Speed: Effect on Cutting Forces and Process Damping in Milling of 7050 T7451 Aluminum
Submission Author:
Rafael Mundim , SP
Co-Authors:
Anderson Vicente Borille, Rafael Mundim
Presenter: Rafael Mundim
doi://10.26678/ABCM.COBEM2017.COB17-0525
Abstract
It is often found in literature that high speed cutting (HSC) offers benefits related to reduction in cutting forces. However, no data regarding the dynamic cutting behavior is provided, thus not allowing for assertive conclusions to be made on the actual benefits of reduction of cutting forces. This experimental study investigated the effect of cutting speed on cutting forces and damping in milling of an aluminum alloy (AA 7050 T7451) over a range that covers both conventional and HSC cutting speeds. For this, a typical setup adopted when milling these alloys was used, consisting of a 16000 RPM CNC machine tool and a cutter with a diameter large enough to allow for cutting speeds as high as 2500 m/min. Experimental data consisted of on-line force measurements, tap testing and subsequent chip type and form analysis. Findings indicate that the dynamic behavior of the fixture system may have a more significant effect on the cutting process than any reduction in cutting forces expected at high speeds. Additionally, results indicate that as long as the cutting process is dynamically stable, any influence of reduction of amplitude of cutting forces may be imperceptible under usual production scenarios.
Keywords
HSC, milling, aluminum, cutting stability, cutting force
