Strength Parameters of Hardening Cylindrical Workpieces by Tapered Roller

A theoretical study of the force parameters of the process of hardening a cylindrical part with a tapered roller by the method of surface plastic deformation (SPD) has been performed. Using an approximate model of propagation of plastic deformation, an engineering technique has been developed that allows one to set the process power modes taking into account the mutual influence of the required degree of material hardening and work hardening, as well as the geometrical parameters of the workpiece and the deforming roller. The force of deformation is determined taking into account the hardening of the material changing according to the power law and the surface area of the contact of the roller with the workpiece. The degree of material deformation and the force of deformation in the process of hardening are investigated depending on the depth of work hardening, the angle of inclination of the forming roll deforming roller and its diameter. The results of the theoretical study are in good agreement with the known experimental data and can be used in the development of technological operations for hardening machine parts by running in rollers.