Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Analysis of the influence of cutting edge preparation in gun drill wear in deep drilling of AISI 4144M
Submission Author:
Milton Polli , PR
Co-Authors:
Lucas Campos, Renan Curce, Marlon José Cardoso, Moises Santana, Milton Polli
Presenter: Milton Polli
doi://10.26678/ABCM.COBEM2017.COB17-5919
Abstract
Methods of cutting edge preparation have been increasingly developed by the industry due to the provided benefits, like increasing tool life and consequently reducing costs. The technique of these methods is highly complex and there is relatively limited scientific data available about it. This paper evaluates the viability of using gun drills prepared through the automatic honing process of drag finishing, in which a machine is used for the cutting edge preparation, replacing the manual brushing process to prepare tools with rounded edges for deep drilling of SAE 4144M steel. Scanning electron microscope and EDS analysis were used to reveal the wear mechanisms. Local chemical composition of worn surfaces was detected by means of energy spectroscopy system (EDS). The results show that automatic honing process leads to a uniform cutting edge with a greater cutting edge radius when compared to the manual process. Gun drills prepared through the automatic honing process of drag finishing can achieve higher tool life due to the elimination of defects and irregularities of the cutting edge.
Keywords
gun drill, Honing, Drilling
