Resumo

HERNANDEZ-GONZALEZ, Luis W.; DUMITRESCU, Luminita; QUESADA-ESTRADA, Ana M.  e  REYES-CAMARENO, Raúl. Cutting parameters determination in milling of AISI 1045 steel. Universidad y Sociedad [online]. 2020, vol.12, n.6, pp. 207-214.  Epub 02-Dez-2020. ISSN 2218-3620.

The selection of cutting parameters is a complex and important task. Carbon steels have a wide range of machinability, depending on their ductility and hardness. The literature review showed the surface roughness is one of the most studied variables, however, machined workpiece hardness has been poorly analyzed. Therefore, this paper aims to determine the best values of cutting speed and feed rate, with regards to surface roughness and Brinell hardness, in dry end milling of carbon steel with a high-speed steel cutting tool. The combination of signal to noise and analysis of variance were used in this investigation, besides, the model adequacy examination was carried out through residual analysis. The cutting speed, feed rate and regression model were statistically significant for hardness, also a moderate increase of it was found. On the other hand, feed rate was statistically significant factor for surface roughness and, its lowest value for the lower feed rate and the medium cutting speed was observed. Besides, the 75 % of the data values are less than or equal to 3,2 µm, therefore, the grinding operation could be avoided.

Palavras-chave : Milling; cutting parameters; plain carbon steel; surface roughness; hardness.

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