Efeitos dos parâmetros de corte na qualidade de peças usinadas pelo processo de torneamento

Abstract

A major concern for those working in the metal-mechanic sector, particularly manufacturing processes for mechanical machining, is the quality, productivity and cost. Know, however, that these variables are dependent on the cutting parameters (speed, feed and depth of cut). The purpose of this study is to investigate the influence of cutting parameters on the quality of the machined by turning process. For the analysis of quality of parts we chose to survey the parameter average roughness Ra and roundness errors of form and roundness. As part material worked with the aluminum alloy 6351-T6 to be a type of alloy widely used in the metal mechanic. The machining operation is the external longitudinal turning with and without the use of cutting fluid. The cutoff parameter analyzed was advancing, and indirectly greatness depth of cut, as this parameter directly influences the value of this magnitude and this, in turn, strength and vibration machining system: machine-piece tool. The results suggest that increasing the advancement involves increasing the roughness average Ra and hence the lower the surface quality of the machined part. The results also induce the understanding that the use of cutting fluid during machining tends to generate parts with better surface quality, while maintaining the values of roughness more stable. Finally, contacts that deviations from circularity and cylindricity presented by machined parts tend to be lower when machining with the use of cutting fluid