Influence of Curvature and Cross-sectional Shape of Cylindrical Surface Formed by Turning on Its Roughness

The cross-sectional curvature and shape (inner and outer) of a cylindrical surface formed by turning have an effect on the roughness parameter—the arithmetic mean deviation of the Ra profile. The main regularities in this influence are analyzed in this article. The authors investigated specially designed test specimens using their own method, which excludes the influence of other parameters on the roughness forming process. The diameters of the cylindrical surfaces of test specimens were selected taking into account the spindle rotation speed of the lathe. As a result, these surfaces were machined at practically the same cutting speed when performing the final processing step. The Grebbs criterion was used to evaluate the uniformity of surface roughness obtained experimentally.