Modelling the dependence between regular reliefs ridges height and the ball burnishing regime’s parameters for 2024 aluminum alloy processed by using CNC-lathe machine

Abstract

New approach for obtaining regular reliefs onto cylindrical and tapered surfaces, by using ball burnishing process, performed on CNC-lathe machine having C-axis installed, is presented. It allows to simplify the burnishing tool and to perform the burnishing operation on the same lathe machine as previous cutting operations. The equations for the points coordinates calculation of the needed complex ball tool trajectory are shown. For their approbation, and in order to obtain a stochastic model which established the relation between the ball burnishing regime parameters (deforming force F, and feedrate f) and resulting height (Rz) of regular reliefs cells boundary ridges, an experimental investigation is carried out, using 2024-T3 aluminum alloy, and the methodology of the rotatable experimental plans. The corresponding response surface of the model is given and discussed. Conclusions about the advantages and disadvantages of the approach are given, and also for the suitable application of the obtained stochastic model.