Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
INFLUENCE OF CUTTING PARAMETERS IN SURFACE ROUGHNESS AND BURR FORMATION DURING HYBRID MANUFACTURING OF 316L STAINLESS STEEL
Submission Author:
Ed Claudio Bordinassi , SP
Co-Authors:
Bianca Tarasco, Gabriel Castanheira, Raphael Costa, Vanessa Seriacopi, Adalto de Farias, GUILHERME LEBRAO, Gilmar Batalha, Ed Claudio Bordinassi
Presenter: Vanessa Seriacopi
doi://10.26678/ABCM.COBEM2021.COB2021-0123
Abstract
Additive manufacturing is growing up in recent years, mainly for small pieces, complex geometries and materials as titanium alloys and stainless steels used in medicine applications. The surface roughness in additive manufacturing is pronounced and, for some applications, another process must be used to finish the surface pieces, and in this case the hybrid manufacturing is an alternative. The objective of this paper was to analyze the influence of laser power (used in the additive manufacturing) and cutting parameters (in milling), in the surface roughness and burr formation during hybrid manufacturing. AISI 316L stainless steel pieces were manufactured using the direct metal laser sintering (DMLS) technique with laser powers of 160 and 190 W. A factorial experimental design was applied and 32 parts were manufactured, varying the cutting parameters for both laser powers: feed rate, cutting speed, cutting depth and use of fluid. Characterizations were performed to measure the average roughness, using a portable rugosimeter, the height of the burr, using a profile projector. The data of the surface roughness and burr measurements were statistically analyzed in the Minitab software, generating graphs of the main effects and interactions, which made possible the evaluation of the influence of each parameter of the hybrid manufacture in the surface finishing. The cutting depth was the parameter that most impacted the average roughness of the pieces, its increase generated higher roughness values. In addition, the following interactions consisted in the factors with the highest influence on the roughness of the parts, respectively: (i) the cutting depth with the laser power; (ii) the cutting depth with the presence or absence of fluid; and (iii) the cutting speed with the feed rate. In turn, the feed rate was the parameter that most affected the burr formation, its increase raised the burr heights. The terms with the highest influence on burr formation were, respectively, the feed rate, the interaction of feed rate with cutting depth and the interaction between all parameters, except the cutting speed. It was found that different laser power parameters in additive manufacturing influenced the surface finish.
Keywords
Additive manufacturing, Hybrid Manufacturing, burr, surface roughness
