Influence of cutting parameters in face milling of nodular cast iron grade 500 using carbide tool affect the surface roughness and tool wear

摘要

The purpose of this research was to investigate the effect of main factors on the surface roughness in nodular cast iron FCD 500 face milling by carbide tool. The results obtained from the analysis which used in the automotive industry, manufacture of molds and other parts of the industries. The etching experiments using semi-automated milling machine Obraeci Strojie brand FGV 32 model. Concerned the material was nodular cast iron FCD 500 using inserts carbide tool. The factors study used a speed, feed rate and depth of cut. Preliminary experiments showed that the depth of cut does not affect the surface roughness fix depth of cut at 2 mm The experiment illustrated that the factor affecting surface roughness was feed rate and cutting speed with tendency for reduction of roughness value at lower feed rate and greater cutting speed, it was possible determine a facing condition by means of the equation Ra = 0.996-0.000597 speed+0.000485 feed rate. Leading this equation goes to use is in limitation speed 710-1,400 rpm at feed rate 224-450 mm/min. From the experiment is to confirm the result of a comparison between the equation and the action value. The result from the experiment of mean absolute percentage error of the equation of surface roughness is 3.90% which is less than the margin of error and is acceptable. Pattern of wear was similar to mechanical fatigue cracking. It may be due to the very tip of the cutting tool or an impact and flank wear as cutting tool materials resistant to wear less.