Eventos Anais de eventos
COBEF 2021
11th Brazilian Congress on Manufacturing Engineering
Micromilling of Ti-6Al-4V samples printed by Selective Laser Melting (SLM)
Submission Author:
Maria Clara Coimbra Gonçalves , SP
Co-Authors:
Maria Clara Coimbra Gonçalves, Gilmar Batalha, Rodrigo Stoeterau, Marcello Mergulhão, Maurício David Martins das Neves
Presenter: Maria Clara Coimbra Gonçalves
doi://10.26678/ABCM.COBEF2021.COB21-0150
Abstract
3D printing process through Selective Laser Melting has gained attention in manufacturing near net shape components, due to less material consumption and its innovation potential in terms of capability of generating complex geometries. On the other hand, printing strategies leaves the SLM parts with a periodic waviness surface, related to the thickness of the fusion powder layer, and anisotropies regarding its printing direction. Although, for industrial application, some parts are required to have reference surfaces, dimensional and geometric tolerances, and/or specific roughness that are obtained by machining processes. However, the effect of waviness and anisotropy on the machinability, specifically on the micromachining process, are barely known. Therewith, the aim of this study is to analyze the effect of waviness and anisotropy over micromilling process outcomes for Ti-6Al-4V samples printed by SLM. On average, the results have shown that the anisotropy of the samples influences their machinability, with the cutting forces, roughness and burr formation higher in one direction. Moreover, experiments with smaller diameters tools and higher rotations provided the best results. Hence, the effect of anisotropy on the machinability of these parts can be highlighted, which can be used to increase efficiency and to reduce manufacturing costs.
Keywords
micromilling, Ti-6Al-4V, SLM, Additive manufacturing
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