Vida y productividad de la herramienta de corte en el fresadode acabado del acero endurecido AISI D6

Abstract

Finish milling of hardened steels at high speed has been limited by premature tool wear and dynamic instability. During finish milling of inclined surfaces with ball end mill, high interruptions occur during cutting and dynamic phenomena different to those that occur during milling flat surfaces. In this work the influence of dynamic stability in efficiency and productivity of inclined surface finish milling in hardened steel AISI D6 with high speeds, was studied. The experiments were performed on a machining center MORI SEIKI SV40 with CNC control. They were used as well, interchangeable carbide tools and two tool holder, one of steel and the other of carbide. The evaluation of the dynamic stability was based on the analysis of the spectra frequency of cutting radial forces obtained through Fast Fourier Transform (FFT) and Root Main Square (RMS) of the signal in time domain. It was confirmed that in more stable processes, the volume of removed chip and the cut area by the tool are larger, resulting in an increase of the process productivity and obtaining besides an increase of the tool life and better results in the surface finish workpiece.