Effect of process parameters on surface roughness and amplitude of vibration in micro milling of AISI 304 steel, International

Micromilling is one of the important machining processes used to make complex shapes with required surface quality. The micro milling is carried out with mill cutters which are having diameter less than 1mm at high spindle rotational speeds. Aim of the present study to investigate effect of process parameter such as spindle rotational speed, feed and depth of cut on amplitude of cutter vibration and surface roughness
for micromilling of AISI 304 steel. As per full factorial design of experiments, 27 experiments were conducted on ASIS 304 at dif erent levels of process parameters. A Laser Doppler Vibrometer was used for on-line measurement of cutter vibration in the
form of acousto optic emission signals. The signals were processed using Fast Fourier transformer to read the amplitude directly. In addition to that, surface roughness was
also measured for all the experiments. The experimental results were analysed using analysis of variance technique to identify significant parameters. Interaction effect of process parameters on the amplitude of cutter vibration and the surface roughness
was also studied