INFLUENCE OF DIFFERENT CUTTER HELIX ANGLE AND CUTTING CONDITION ON SURFACE ROUGHNESS DURING END-MILLING OF C45 STEEL

This experimental study investigated the effects of milling conditions on the finished surface roughness. With four controllable factors-three levels (cutting velocity, feedrate, radial depth of cut, and cutter helix angle), the nineteen experiments were performed with performance measurements of surface roughness. By ANOVA analysis, the effect of cutting conditions on the surface roughness were analyzed and modeled. The most suitable regression of surface roughness was a quadratic regression with the confidence level is more than 97%, and this model was successfully verified by experimental results with very promising results. Besides, by using ANOVA method, the optimization process of surface roughness was performed. The optimum value of surface roughness is 0.2259 μm that was obtained at cutting velocity of 143.4904 m/min, a feedrate of 0.01 mm/flute, at a radial depth of cut of 0.1 mm, and a cutter helix angle of 45o. The approach method of the present study can be applied in industrial machining to improve the surface quality in finished face milling the C45 Steel