Study Of Residual Stresses And Surface Roughness In Cnc Milling Of Aisi 202 Steel

Abstract

In today’s manufacturing applications, it is seen that quality and productivity plays an
essential role. The basic aim for manufacturing field which is directly under the influence of quality. The
essential parameter of milling process is surface roughness. By improving surface roughness, the quality
of injected product such as cell phones, laptops, aerospace and automotive parts which depend on
finishing, is improved. In the case of residual stress on the machined surface, axial depth of cut has
major influence followed by feed rate and milling speed. The measurement of Residual stress in feed
direction by x- ray diffraction (XRD). RSM was applied to establish a quadratic relationship between
input and output parameters and then analysis of variance (ANOVA) was applied for the evaluation of
formula. RSM is also used for optimization of cutting parameters of minimum surface roughness. The
major objective in CNC milling operation, while the response parameters selected are surface roughness
and residual stress. Different cutting parameter which influence Residual stress and surface finish,
measured for the analysis on AISI 202 stainless steel with the use of Response Surface method (RSM).