ИССЛЕДОВАНИЕ АДГЕЗИОННОЙ СОСТАВЛЯЮЩЕЙ КОЭФФИЦИЕНТА ТРЕНИЯ ИНДЕНТОРА ИНСТРУМЕНТА С ПОВЕРХНОСТЬЮ ДЕТАЛИ ПРИ ОБРАБОТКЕ МЕТОДАМИ ПОВЕРХНОСТНОГО ПЛАСТИЧЕСКОГО ДЕФОРМИРОВАНИЯ

Abstract

The paper presents the results of studying the parameters of the contact interaction between the tool indenter and the work surface of parts while machining by methods of surface plastic deformation by diamond smoothing and ball burnishing. Changes in the technological factors of diamond smoothing and burnishing under relatively equal machining conditions have different effects on the formation of the topography and parameters of the microprofile. This is due to the contact character of the indenter with the surface. When diamond smoothing, the indenter is rigidly fixed in the tool holder, whereas for ball burnishing the indenter rotates. Accordingly, sliding friction prevails for smoothing, and rolling friction prevails for burnishing. Friction forces in the contact area of the tool indenter with the surface of the part affect the processes. Friction coefficient depends on the deformation and adhesive components. The processes of plastic deformation of metal, the quality of the work surface and other machining parameters in the contact area of the indenter with the work surface are greatly influenced by the strength of the adhesive bond and the molecular component of the friction coefficient. The values of these factors are determined by the combination of materials of the contacting surfaces. This information is often not available in the reference and scientific sources, and theoretical calculations do not allow taking into account real machining factors. The paper presents the methodology and some results of studying the molecular component of the friction coefficient, the specific strength of the adhesive bond and the pressure coefficient in the contact area of the indenter with the surface during diamond smoothing and ball burnishing. The presented results give the scientific novelty of the paper.