The Flat Surfaces Local Loading Feed Impact on the Surface Layer Stress State

Abstract

AbstractThere is a wide range of machine parts that have flat working surfaces with high requirements for surface quality and operational properties. In the flat surface hardening by surface plastic deformation (SPD), the feed direction usually depends on the milling table path. Using the ANSYS software package, the surface layer stress–strain state was determined when changing the feed direction and cross-feed value at local loading of a flat surface. The feed-induced active stress distribution analysis showed that maximum active and residual stresses increase after the second pass regardless of the feed value and direction. It is worth noting that the smaller the working tool cross-feed, the higher are the maximum active and residual compressive stresses. When feed changes from 1 to 0.5 mm/pass (or mm/double pass), the maximum active stress increases by 5–15%, and the residual stress intensity increases by 8–20%. The presented results of loading process simulation with different patterns of the deforming tool movement show the possibility of increasing of the part stressed state intensity during SPD processing.KeywordsSurface plastic deformationFeedStress stateDeforming toolLocal loading