Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Influence of Deburring Methods in Micro Slots of Inconel 718
Submission Author:
Gabriel de Paiva Silva , GO
Co-Authors:
Gabriel de Paiva Silva, Marcio Bacci Da Silva, Déborah de Oliveira
Presenter: Gabriel de Paiva Silva
doi://10.26678/ABCM.COBEM2021.COB2021-0129
Abstract
In view of the increasing trends towards miniaturization of components, machining processes have been trying to attain higher levels of dimensional and geometric quality. Micromilling cannot be analyzed with the same theories applied in the macro-scale process, because the cutting edge radius of the tool is greater than the minimum chip thickness, characterizing the size effect. One of the main issues associated with the quality of surfaces obtained by micromilling is the presence of burrs. Inconel 718 is a nickel super-alloy commonly used in aggressive conditions, such as nuclear and aerospace industries, due to its outstanding mechanical properties. This material is well known for its low machinability and it is frequently reported to exhibit burrs when micromilled. Deburring techniques often performed in traditional milling cannot always be performed in micromilled surfaces, since they might affect the dimensional accuracy and possibly damage the piece. Therefore, this work aims to investigate the effectiveness of deburring operations on slots obtained by micromilling of Inconel 718. In order to reduce potential damage on the surface, the abrasive deburring method was selected. Four different abrasive grit sizes were employed so that their abilities of removing the burrs could be analyzed. It was possible to notice that the abrasive size did not had high influence in the deburring. The selected method was able to reduce the burr heights from 350 µm to 8 µm, approximately. The analysis of the deburred surfaces indicates that despite the high burr removal, there was no damage in the slot geometry nor in the sample surface. Therefore, the selected methodology proved to be suitable for deburring slots in flat surfaces.
Keywords
micro milling, Deburring methods, Inconel 718, surface quality
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